Day: October 27, 2021

Name: (E)-2-Methylbut-2-enoic acid. In 2020 FOOD ADDIT CONTAM A published article about MASS-SPECTROMETRY; ECHIUM-VULGARE; N-OXIDES; CYNOGLOSSUM-OFFICINALE; VENOOCCLUSIVE DISEASE; METABOLIC-ACTIVATION; MEDICINAL-PLANTS; RISK-ASSESSMENT; IDENTIFICATION; BIOSYNTHESIS in [Maedge, Inga; Gehling, Matthias; Schoene, Cindy; These, Anja] German Fed Inst Risk Assessment, Dept Safety Food Chain, Max Dohrn Str 8-10, D-10589 Berlin, Germany; [Maedge, Inga; Winterhalter, Peter] Tech Univ Carolo Wilhelmina Braunschweig, Inst Food Chem, Braunschweig, Germany in 2020, Cited 64. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1.

Pyrrolizidine alkaloids (PAs) and their corresponding N-oxides (PANOs) have been determined in food and feed at levels relevant for consumer health. More than 660 different PAs have been detected, but few are available as reference substances for analytical demands. In the context of the European legislation on maximum levels of PAs in food products, a defined analytical scope of 21 PAs for determination has been suggested. An expansion of the scope from 21 to 35 PAs, including 14 structural isomers, is currently under discussion. In the present study, a target screening method was established for a comprehensive characterisation of PA profiles of the species Echium vulgare, Heliotropium europaeum, Cynoglossum officinale and Symphytum spp. to assess whether an expansion of the analytical scope is required to quantitatively cover the total PA contents of Boraginaceae species. The scope of the method comprised known and unknown PAs previously screened and confirmed in the respective plant extracts. A total of 176 PAs and PANOs were detected. The toxic 1,2-unsaturated PAs represent the predominant PA type with about 98% of the mean total content. This PA profiling demonstrates that an expansion of the scope from 21 to 35 PAs is required to adequately cover the mean total PA contents of Cynoglossum officinale and H. europaeum, whereas in the case of Symphytum spp. and Echium vulgare an expansion would not be necessary.

Name: (E)-2-Methylbut-2-enoic acid. About (E)-2-Methylbut-2-enoic acid, If you have any questions, you can contact Madge, I; Gehling, M; Schone, C; Winterhalter, P; These, A or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Recently I am researching about TERMINATED COPOLYSILOXANES; THERMAL-DEGRADATION; CRYSTALLIZATION; POLYDIMETHYLSILOXANE; POLYSILOXANES; KINETICS; SYSTEM, Saw an article supported by the NSFCNational Natural Science Foundation of China (NSFC) [21871157, 21704048, 21434008]; Major Program of Shandong Province Natural Science Foundation [ZR2017ZB0105]; Shandong Province Natural Science FoundationNatural Science Foundation of Shandong Province [ZR2017PB008, ZR2018JL007]; Taishan Scholars Program [tsqn20161031]. Quality Control of Benzyl Alcohol. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Shi, JF; Zhao, N; Xia, S; Liu, SF; Li, ZB. The CAS is 100-51-6. Through research, I have a further understanding and discovery of Benzyl Alcohol

Polysiloxanes containing phenyl functional groups are a class of promising polymer materials with enhanced low-temperature flexibility, high-temperature stability and great damping properties. In this context, organic cyclic trimeric phosphazene bases (CTPBs) have been proved to be highly efficient for the ring-opening polymerization (ROP) of octamethylcyclotetrasiloxane (D4) and the copolymerization of D4 with octaphenylcyclotetrasiloxane (P4) under mild conditions. The polymerizations are fast and the resulting polymers have high molecular weights (Mn up to 1353 kg mol-1). The molecular structures of the obtained copolysiloxanes were characterized by 1H NMR and 29Si NMR, which demonstrate that as high as 64 mol% diphenyl siloxane units can be incorporated within the copolysiloxane chain. Remarkably, copolysiloxanes with different contents of the diphenyl siloxane group are found free of T-branches and Q-branches based on the 29Si NMR analysis, indicating a good controlled ROP by the current organocatalytic system. DSC analysis shows no crystallization exotherm or melting endotherm in the range of -70 degrees C to 50 degrees C for all the copolysiloxanes, confirming that incorporation of diphenyl groups successfully suppresses the undesirable crystallization of polydimethylsiloxane. Moreover, the thermal stability of copolysiloxanes was evaluated by TGA, showing dramatically enhanced thermal stability with the increment of the diphenyl siloxane content.

Quality Control of Benzyl Alcohol. About Benzyl Alcohol, If you have any questions, you can contact Shi, JF; Zhao, N; Xia, S; Liu, SF; Li, ZB or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Effects of time and temperature during melanging on the volatile profile of dark chocolate WOS:000571915100043 published article about CHEMICAL-COMPOSITION; MILK CHOCOLATE; COCOA; AROMA; FLAVOR; FERMENTATION; CHEMISTRY; PROTEIN; MASS in [Clark, Caitlin; Miller, Jeffrey; Stone, Martha] Colorado State Univ, Dept Food Sci & Human Nutr, Ft Collins, CO 80523 USA; [Clark, Caitlin; Miller, Jeffrey] Nuance Chocolate, Ft Collins, CO USA; [Bettenhausen, Harmonie M.; Heuberger, Adam L.] Colorado State Univ, Dept Hort Sci & Landscape Architecture, Ft Collins, CO 80523 USA; [Yao, Linxing] Colorado State Univ, Prote & Metabol Facil, Ft Collins, CO 80523 USA in 2020.0, Cited 52.0. The Name is Benzyl Alcohol. Through research, I have a further understanding and discovery of 100-51-6. Product Details of 100-51-6

Chocolate made from small-batch production is known for distinct sensory properties that differentiate its products from large-scale production. Specifically, small-batch processing includes a melanging step, a chocolate refining (a process involving time and temperature to refine texture and flavor) process that occurs in a stone wet-grinder. Chocolatiers understand that melanging is essential to flavor and overall quality, however the influence of melanging on the aroma chemistry of the finished chocolate is anecdotal and largely uncharacterized. Here, we evaluated the effects of time and temperature of melanging on the volatile chemistry of the finished chocolate. Specifically, chocolate aroma was profiled using HS/SPME-GC-MS for three different time and temperature combinations. A total of 88 compounds were annotated by mass spectrometry and included a diverse set of chemical classes such as pyrazines, aldehydes, terpenes, alcohols, esters, and ketones. Analysis of variance (ANOVA), principal component analysis (PCA), and partial least squares analysis (PLS) revealed that the overall aroma profile was influenced by the type of melanging, and time had a greater effect than temperature. Example compounds affected by time include 2-methylpropanal, dimethyl sulfide, and benzaldehyde. Particle size was also measured for each sample. Majority particle size was found to be below 25 microns generally at all time points beyond 8 h. Analysis showed significant p-values for the temperature variable for several compounds, but significant p-values for the time variable were apparent for a greater number of compounds. For compounds which showed dependency on both time and temperature, the p-value for the time variable was much smaller in most cases. Both PCA and OPLS analyses suggested the same trends. These data support that time is a critical factor in determining the aroma chemistry of chocolate and affects a diverse set of known flavor active compounds.

Product Details of 100-51-6. About Benzyl Alcohol, If you have any questions, you can contact Clark, C; Bettenhausen, HM; Heuberger, AL; Miller, J; Yao, LX; Stone, M or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Pacheco, BS; Da Silva, CC; Da Rosa, BN; Mariotti, KC; Nicolodi, C; Poletti, T; Segatto, NV; Collares, T; Seixas, FK; Paniz, O; Carreno, NLV; Pereira, CMP in SPRINGER INTERNATIONAL PUBLISHING AG published article about in [Pacheco, Bruna S.; Da Silva, Caroline C.; Da Rosa, Bruno N.; Nicolodi, Caroline; Poletti, Tais; Pereira, Claudio M. P.] Univ Fed Pelotas, Lab Lipid & Bioorgan, Bioforens Res Grp, BR-96001970 Pelotas, RS, Brazil; [Mariotti, Kristiane C.] Brazilian Fed Police, Biometr Grp, BR-90610093 Porto Alegre, RS, Brazil; [Segatto, Natalia, V; Collares, Tiago; Seixas, Fabiana K.] Univ Fed Pelotas, Postgrad Program Biotechnol, Res Grp Cellular & Mol Oncol, BR-96001970 Pelotas, RS, Brazil; [Paniz, Oscar; Vilarreal Carreno, Neftali Lenin] Univ Fed Pelotas, Technol Dev Ctr, Mat Sci & Engn, BR-96010000 Pelotas, RS, Brazil in 2021, Cited 30. Safety of 4-Methoxybenzaldehyde. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5

Fingerprint development is one of the most useful techniques in forensic investigation. The powder method is widely used, as it consists of a non-destructive testing. However, some of the powders commonly used are toxic and dangerous to human health. In this sense, monofunctional analogues of curcumin (3a-e) are proposed as novel coloring powders for the development of latent fingerprints. Granulometric and scanning electron microscopy analysis were performed for a better understanding of the interaction between developers and substrates. The best results for the development of fingerprints were obtained with compound (1E,4E)-1,5-di-p-tolylpenta-1,4-dien-3-one (3b). Development with this compound was specific and allowed detection both from male and female donors. Also, in an in vitro experiment, compound 3b presented low cytotoxicity in a mammalian cell line. Based on that, a novel alternative for latent fingerprint developers was proposed.

About 4-Methoxybenzaldehyde, If you have any questions, you can contact Pacheco, BS; Da Silva, CC; Da Rosa, BN; Mariotti, KC; Nicolodi, C; Poletti, T; Segatto, NV; Collares, T; Seixas, FK; Paniz, O; Carreno, NLV; Pereira, CMP or concate me.. Safety of 4-Methoxybenzaldehyde

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Traceless selenocarboxylates for the one-pot synthesis of amides and derivatives WOS:000604923900010 published article about BOND FORMATION; CARBOXYLIC-ACIDS; EFFICIENT AMIDATION; STAUDINGER LIGATION; PRACTICAL SYNTHESIS; SECONDARY AMIDES; AMINO-ACIDS; THIO ACIDS; AZIDES; PEPTIDE in [Silva, Luana; Rosario, Alisson R.; Machado, Bianca M.; Ludtke, Diogo S.] Univ Fed Rio Grande do Sul, Inst Quim, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS, Brazil in 2021, Cited 75. Application In Synthesis of (E)-2-Methylbut-2-enoic acid. The Name is (E)-2-Methylbut-2-enoic acid. Through research, I have a further understanding and discovery of 80-59-1

We have recently reported a one-pot procedure for glycosyl amides synthesis using selenocarboxylate as traceless reagent. Herein, we present a further application of selenocarboxylate-azide reaction for amide bond formation on a broader range of substrates, including heterocyclic systems and fatty acid. This method proved to be highly efficient for the synthesis of primary and secondary amides, sulfonamides, imides, phosphoramide and also carbamate. (C) 2020 Elsevier Ltd. All rights reserved.

Application In Synthesis of (E)-2-Methylbut-2-enoic acid. About (E)-2-Methylbut-2-enoic acid, If you have any questions, you can contact Silva, L; Rosario, AR; Machado, BM; Ludtke, DS or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Quality Control of m-Methoxyphenol. Utsumi, T; Noda, K; Kawauchi, D; Ueda, H; Tokuyama, H in [Utsumi, Tatsuki; Noda, Kenta; Kawauchi, Daichi; Ueda, Hirofumi; Tokuyama, Hidetoshi] Tohoku Univ, Grad Sch Pharmaceut Sci, Aoba Ku, Aoba 6-3 Aramaki, Sendai, Miyagi 9808578, Japan published Nitrile Synthesis by Aerobic Oxidation of Primary Amines and in situ Generated Imines from Aldehydes and Ammonium Salt with Grubbs Catalyst in 2020, Cited 64. The Name is m-Methoxyphenol. Through research, I have a further understanding and discovery of 150-19-6.

Herein, a Grubbs-catalyzed route for the synthesis of nitriles via the aerobic oxidation of primary amines is reported. This reaction accommodates a variety of substrates, including simple primary amines, sterically hindered beta,beta-disubstituted amines, allylamine, benzylamines, and alpha-amino esters. Reaction compatibility with various functionalities is also noted, particularly with alkenes, alkynes, halogens, esters, silyl ethers, and free hydroxyl groups. The nitriles were also synthesized via the oxidation of imines generated from aldehydes and NH4OAc in situ.

About m-Methoxyphenol, If you have any questions, you can contact Utsumi, T; Noda, K; Kawauchi, D; Ueda, H; Tokuyama, H or concate me.. Quality Control of m-Methoxyphenol

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Authors Washio, A; Hosaka, M; Uemura, N; Yoshida, Y; Mino, T; Kasashima, Y; Sakamoto, M in AMER CHEMICAL SOC published article about CHIRAL-SYMMETRY BREAKING; CRYSTALLIZATION; TRANSFORMATION; EMERGENCE in [Washio, Aoi; Hosaka, Momoka; Uemura, Naohiro; Yoshida, Yasushi; Mino, Takashi; Sakamoto, Masami] Chiba Univ, Grad Sch Engn, Dept Appl Chem & Biotechnol, Chiba 2638522, Japan; [Yoshida, Yasushi; Mino, Takashi; Sakamoto, Masami] Chiba Univ, Mol Chiral Res Ctr, Chiba 2638522, Japan; [Kasashima, Yoshio] Chiba Inst Technol, Educ Ctr, Fac Creat Engineeing, Chiba 2750023, Japan in 2021, Cited 37. HPLC of Formula: C8H8O2. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5

The highly enantioselective synthesis of p-anisoin was achieved via the benzoin condensation of a prochiral p-anisaldehyde using achiral NHC catalysts such as vitamin B1. In this reaction, p-anisoin crystallized as a conglomerate, and the deracemization of racemic p-anisoin under basic conditions was efficiently performed by Viedma ripening. Although the handedness of the enantioselective crystallization could not be controlled by spontaneous crystallization, it could be controlled by the coexistence of a catalytic amount of optically active valine. It was clarified that this is due to the asymmetric transformation of p-anisoin with enantiomeric valine in the mother liquor.

HPLC of Formula: C8H8O2. About 4-Methoxybenzaldehyde, If you have any questions, you can contact Washio, A; Hosaka, M; Uemura, N; Yoshida, Y; Mino, T; Kasashima, Y; Sakamoto, M or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Recently I am researching about ASYMMETRIC TRANSFER HYDROGENATION; ENANTIOSELECTIVE TRANSFER HYDROGENATION; NICKEL-COMPLEXES; IRON CATALYSTS; COBALT; RUTHENIUM; REDUCTION; EFFICIENT; LIGANDS; BONDS, Saw an article supported by the Nazarbayev University via NU-ORAU grant [2016023]; Nazarbayev University via FDCRG grant [240919FD3911]. Formula: C7H6O2. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Segizbayev, M; Oztopcu, O; Hayrapetyan, D; Shakhman, D; Lyssenko, KA; Khalimon, AY. The CAS is 100-83-4. Through research, I have a further understanding and discovery of 3-Hydroxybenzaldehyde

The aminophosphinite pincer complex (POCNH)NiBr was found to effectively catalyze the transfer hydrogenation of aldehydes and ketones with 2-propanol and (KOBu)-Bu-t as a base, presenting a rare example of bifunctional nickel transfer hydrogenation catalysts. The transfer hydrogenation of aldehydes and ketones was found to be selective, tolerating a wide range of other functional groups, including those prone to reduction, such as esters, amides, alkenes, pyridines, and nitriles. The reactions were suggested to proceed via the metal-ligand cooperative mechanism with an intermediacy of an amido (POCN)Ni-II species.

About 3-Hydroxybenzaldehyde, If you have any questions, you can contact Segizbayev, M; Oztopcu, O; Hayrapetyan, D; Shakhman, D; Lyssenko, KA; Khalimon, AY or concate me.. Formula: C7H6O2

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Safety of 3,4-Dimethoxybenzaldehyde. I found the field of Biochemistry & Molecular Biology; Chemistry very interesting. Saw the article 3,7-bis-benzylidene hydrazide ciprofloxacin derivatives as promising antiproliferative dual TOP I & TOP II isomerases inhibitors published in 2021, Reprint Addresses Abdel-Aziz, M (corresponding author), Menia Univ, Fac Pharm, Dept Med Chem, Al Minya 61519, Egypt.; Abuo-Rahma, GEDA (corresponding author), Deraya Univ, Fac Pharm, Dept Pharmaceut Chem, New Minia, Minia, Egypt.. The CAS is 120-14-9. Through research, I have a further understanding and discovery of 3,4-Dimethoxybenzaldehyde.

We report herein design and synthesis of a new series of 3,7-bis-benzylidenes of ciprofloxacin. Most of the target compounds revealed good cytotoxic activity; the most potent 4e and 4i achieved strong broad spectrum antiproliferative activity with comparable activity to Doxorubicin with IC50 (M-mu) of 1.21 +/- 0.02, 0.87 +/- 0.04, 1.21 +/- 0.02; 0.41 +/- 0.02, 0.57 +/- 0.06, 1.31 +/- 0.04 and 1.26 +/- 0.01, 1.79 +/- 0.04, 0.63 +/- 0.01 against leukemia cancer cell line HL-60 (TB), colon cancer cell line HCT-116 and breast cancer cell line MCF7, respectively. Moreover, the most potent derivative 4i induced apoptosis at G2/M phase Investigating the mechanism of action of compounds 4e, 4 h and 4i exhibited promising dual TOP I alpha and TOP IIB % inhibition comparable to Camptothecin and Etoposide; respectively. Docking of 4e, 4 h and 4i into the active site of topo I and II proteins compared to Camptothein and Etoposide revealed acceptable binding score and augmented enzyme assay data. Hence, 4e and 4i are promising targeted antiproliferative dual acting TOP I alpha TOP IIB inhibitors that require further optimization.

Safety of 3,4-Dimethoxybenzaldehyde. About 3,4-Dimethoxybenzaldehyde, If you have any questions, you can contact Samir, M; Ramadan, M; Abdelrahman, MH; Abdelbaset, MS; Abourehab, MAS; Abdel-Aziz, M; Abuo-Rahma, GEDA or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

An article Polyfluoroaromatic stavudine (d4T) ProTides exhibit enhanced anti-HIV activity WOS:000497964000013 published article about DERIVATIVES; NUCLEOSIDE; PHOSPHATE in [Kandil, Sahar; Chapman, Fiona M.; Westwell, Andrew D.; McGuigan, Christopher] Cardiff Univ, Sch Pharm & Pharmaceut Sci, King Edward VII Ave, Cardiff CF10 3NB, S Glam, Wales; [Pannecouque, Christophe] Katholieke Univ Leuven, Rega Inst Med Res, Lab Virol & Chemotherapy, Minderbroedersstr 10, B-3000 Leuven, Belgium in 2019, Cited 17. The Name is 3-(Trifluoromethyl)phenol. Through research, I have a further understanding and discovery of 98-17-9. Recommanded Product: 98-17-9

Human Immunodeficiency Virus (HIV) damages the immune system and leads to the life-threatening acquired immunodeficiency syndrome (AIDS). Despite the advances in the field of antiretroviral treatment, HIV remains a major public health challenge. Nucleosides represent a prominent chemotherapeutic class for treating viruses, however their cellular uptake, kinase-mediated activation and catabolism are limiting factors. Herein, we report the synthesis and in vitro evaluation of stavudine (d4T) ProTides containing polyfluorinated aryl groups against two strains; HIV-1 (IIIB) and HIV-2 (ROD). ProTide 5d containing a meta-substituted pentafluorosulfanyl (3-SF5) aryl group showed superior antiviral activity over the parent d4T and the nonfluorinated analogue 5a. ProTide 5d has low nano-molar antiviral activity; (IC50=30 nM, HIV-1) and (IC50=36 nM, HIV-2) which is over tenfold more potent than d4T. Interestingly, ProTide 5d showed a significantly high selectivity indices with SI=1753 (HIV-1) and 1461 (HIV-2) which is more than twice that of the d4T. All ProTides were screened in wild type as well as thymidine kinase deficient (TK-) cells. Enzymatic activation of ProTide 5d using carboxypeptidase Y enzyme and monitored using both P-31 and F-19 NMR is presented.

Recommanded Product: 98-17-9. About 3-(Trifluoromethyl)phenol, If you have any questions, you can contact Kandil, S; Pannecouque, C; Chapman, FM; Westwell, AD; McGuigan, C or concate me.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles