Category: indole-building-block

Zhou, Zijun; Li, Yanjun; Gong, Lei; Meggers, Eric published the artcile< Enantioselective 2-Alkylation of 3-Substituted Indoles with Dual Chiral Lewis Acid/Hydrogen-Bond-Mediated Catalyst>, Application In Synthesis of 4771-48-6, the main research area is enantioselective alkylation indole unsaturated acylimidazole chiral cyclometalated iridium complex; bifunctional chiral Lewis acid hydrogen bond mediated alkylation catalyst; pyrroloindole preparation.

A chiral-at-metal bis-cyclometalated iridium complex combines electrophile activation via metal coordination with nucleophile activation through hydrogen bond formation [e.g., indole I + acylimidazole II → III (89% conversion, 98% ee (S)) in presence of Δ-Ir complex IV.BARF]. This new bifunctional chiral Lewis acid/hydrogen-bond-mediated catalyst permits the challenging enantioselective 2-alkylation of 3-substituted indoles with α,β-unsaturated 2-acylimidazoles in up to 99% yield and with up to 98% enantiomeric excess at a catalyst loading of 2 mol %. As an application, the straightforward synthesis of a chiral pyrrolo[1,2-a]indole is demonstrated.

Organic Letters published new progress about Alkylation catalysts, stereoselective. 4771-48-6 belongs to class indole-building-block, and the molecular formula is C10H9NO, Application In Synthesis of 4771-48-6.

Referemce:
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

Huang, Yong; Song, Liangliang; Gong, Lei; Meggers, Eric published the artcile< Asymmetric Synthesis of Hydrocarbazoles Catalyzed by an Octahedral Chiral-at-Rhodium Lewis Acid>, Application In Synthesis of 4771-48-6, the main research area is hydrocarbazole enantioselective synthesis regioselective synthesis; vinylindole carboxylic ester substituted unsaturated acyl imidazole; Diels Alder reaction chiral Rh complex catalyst; Diels-Alder; asymmetric catalysis; chiral-at-metal; hydrocarbazoles; rhodium.

A bis-cyclometalated chiral-at-metal rhodium complex catalyzes the Diels-Alder reaction between N-Boc-protected 3-vinylindoles (Boc=tert-butyloxycarbonyl) and β-carboxylic ester-substituted α,β-unsaturated 2-acyl imidazoles with good-to-excellent regioselectivity (up to 99:1) and excellent diastereoselectivity (>50:1 d.r.) as well as enantioselectivity (92-99 % ee), e. g., I, under optimized conditions. The rhodium catalyst serves as a chiral Lewis acid to activate the 2-acyl imidazole dienophile by two-point binding and overrules the preferred regioselectivity of the uncatalyzed reaction.

Chemistry – An Asian Journal published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 4771-48-6 belongs to class indole-building-block, and the molecular formula is C10H9NO, Application In Synthesis of 4771-48-6.

Referemce:
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

Erdemir, Serkan published the artcile< Fluorometric dual sensing of Hg2+ and Al3+ by novel triphenylamine appended rhodamine derivative in aqueous media>, Application of C30H36N4O2, the main research area is triphenylamine appended rhodamine derivative mercury detection density functional theory.

Triphenylamine appended rhodamine (named probe TR) was built as a selective fluorescent probe for Al3+ and Hg2+ ions through different sensing mechanisms. TR demonstrated a distinct fluorescence enhancing at 501 and 580 nm towards Al3+ and Hg2+ ions due to the “”PET-off”” (Photoinduced electron transfer-off) and “”FRET-on”” (Fluorescence resonance energy transfer-on) processes, resp. The binding modes between TR with Al3+ and Hg2+ were found to be 1:1 by job plot anal. The limits of detection of TR for sensing Al3+ and Hg2+ are down to 71.8 nM and 0.48 μM, resp. At the same time, the complexation details between the probe TR with Al3+ and Hg2+ ions were investigated by FTIR, 1HNMR experiments and DFT calculations Moreover, simple test papers coated probe TR were successively developed for the rapid monitoring of Al3+ and Hg2+ ions.

Sensors and Actuators, B: Chemical published new progress about Density functional theory. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Application of C30H36N4O2.

Referemce:
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

Kleinmans, Roman; Pinkert, Tobias; Dutta, Subhabrata; Paulisch, Tiffany O.; Keum, Hyeyun; Daniliuc, Constantin G.; Glorius, Frank published the artcile< Intermolecular [2π+2σ]-photocycloaddition enabled by triplet energy transfer>, COA of Formula: C9H6FNO2, the main research area is bicyclohexane preparation thioxanthone catalyst diastereoselective regioselective; coumarin flavone indole bicyclobutane intermol photocycloaddition.

For more than one century, photochem. [2+2]-cycloadditions have been used by synthetic chemists to make cyclobutanes, four-membered carbon-based rings. In this reaction, typically two olefin subunits (two π-electrons per olefin) cyclize to form two new C-C σ-bonds. Although the development of photochem. [2+2]-cycloadditions has made enormous progress within the last century, research has been focused on such [2π+2π]-systems, in which two π-bonds are converted into two new σ-bonds. Here an intermol. [2+2]-photocycloaddition that uses bicyclo[1.1.0]butanes as 2σ-electron reactants was reported. This strain-release-driven [2π+2σ]-photocycloaddition reaction was realized by visible-light-mediated triplet energy transfer catalysis. A simple, modular and diastereoselective synthesis of bicyclo[2.1.1]hexanes from heterocyclic olefin coupling partners, namely coumarins, flavones and indoles, is disclosed. Given the increasing importance of bicyclo[2.1.1]hexanes as bioisosteres-groups that convey similar biol. properties to those they replace-in pharmaceutical research and considering their limited access, there remains a need for new synthetic methodologies. Applying this strategy enabled to extend the intermol. [2+2]-photocycloadditions to σ-bonds and provides previously inaccessible structural motifs.

Nature (London, United Kingdom) published new progress about [2+2] Cycloaddition reaction, stereoselective (regioselective, photochem.). 399-76-8 belongs to class indole-building-block, and the molecular formula is C9H6FNO2, COA of Formula: C9H6FNO2.

Referemce:
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

Fang, Fang; Zheng, Haolin; Mao, Guojiang; Chen, Shanping; Deng, Guo-Jun published the artcile< Metal- and Solvent-Free Synthesis of Tetrahydrobenzo[c]carbazolones through NaI-Catalyzed Formal [4+2] Annulation>, Application In Synthesis of 93247-78-0, the main research area is indolyl cyclohexanone unsaturated compound sodium iodide catalyst regioselective cycloaddition; tetrahydrobenzocarbazolone preparation.

A novel strategy for the preparation of functional carbazoles through NaI-catalyzed formal [4+2] annulation of 2-(indol-3-yl)cyclohexanones and alkynes/alkenes was developed. The present approach started from easily available raw materials and provided a variety of tetrahydrobenzo[c]carbazolones in satisfactory yields under metal- and solvent-free conditions. The products could be further transformed into structurally valuable carbazole-based conjugated derivatives

Journal of Organic Chemistry published new progress about [4+2] Cycloaddition reaction (regioselective). 93247-78-0 belongs to class indole-building-block, and the molecular formula is C10H9NO2, Application In Synthesis of 93247-78-0.

Referemce:
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

Pipattanawarothai, Athit; Trakulsujaritchok, Thanida published the artcile< Hybrid polymeric chemosensor bearing rhodamine derivative prepared by sol-gel technique for selective detection of Fe3+ ion>, Recommanded Product: 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one, the main research area is hybrid polymeric chemosensor rhodamine B derivative functionalized; ferric ion detection colorimetry.

To develop a reusable and selective colorimetric chemosensor for visual detection of ferric ion, a new rhodamine-based chelator (RB-UTES) was prepared The structural constitution and sensing property of RB-UTES were examined The chelator was sensitive and selective for recognition of ferric ion and could be covalently attached to poly(vinyl alc.) through siloxane linkage formed by the sol-gel reaction. The physicochem. properties and sensing behavior of the functional chemosensor films were studied. By simply soaking in aqueous media, the free-standing sensor film exhibited high selectivity and sensitivity to ferric ion and permitted the convenient detection by naked eye with prominent development of pink color throughout the film. The sensor film could return to its original color by washing with 0.1M ethylenediamine allowing repeated cycles of detection. The combination of its anal. performance, simplicity of operation as well as reusability made this functional sensor promising for the use in aqueous solutions and real samples.

Dyes and Pigments published new progress about Colorimetry. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Recommanded Product: 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one.

Referemce:
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

Pu, Xingwen; Zhang, Mangang; Lan, Jingbo; Chen, Shuyou; Liu, Zheng; Liang, Wenbo; Yang, Yudong; Zhang, Min; You, Jingsong published the artcile< Tandem Rh(III)-Catalyzed C-H Heteroarylation of Indolyl Ketones and Cu(II)-Promoted Intramolecular Cyclization: One-Pot Access to Blue-Emitting Phenanthrone-Type Polyheterocycles>, Synthetic Route of 93247-78-0, the main research area is indolyl ketone rhodium copper catalyst tandem heteroarylation cyclization; phenanthrone type polyheterocycle one pot preparation blue emission.

Disclosed herein is a highly efficient one-pot synthetic strategy to phenanthrone-type polyheterocycles via tandem rhodium(III)-catalyzed ortho-C-H heteroarylation of indolyl ketones and copper(II)-promoted intramol. cyclization. This protocol enables a library of blue-emitting fluorophores with high quantum yields and narrow full widths at half-maximum to be rapidly built from readily available substrates, among of which 6,6,7,9,12-pentamethyl-6,12-dihydro-5H-benzofuro[2,3-a]carbazol-5-one exhibits pure blue emission with Commission Internationale de I’Eclairage coordinates of (0.15, 0.09) and a high quantum yield of 85% in CH2Cl2 solution

Organic Letters published new progress about C-H bond activation. 93247-78-0 belongs to class indole-building-block, and the molecular formula is C10H9NO2, Synthetic Route of 93247-78-0.

Referemce:
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

Kong, Lingkai; Tian, Wenyue; Liu, Zhiyan; Xu, Ting; Wen, Haoyue; Chen, Zihan; Gao, Jin; Bai, Li-Ping published the artcile< TfOH-Catalyzed Cascade C-H/N-H Chemo-/Regioselective Annulation of Indole-2-carboxamides with Benzoquinones for the Construction of Anticancer Tetracyclic Indolo[2,3-c]quinolinones>, Reference of 399-76-8, the main research area is indoloquinolinone preparation antitumor human; indole carboxamide benzoquinone cyclization trifluoromethanesulfonic acid.

An efficient TfOH-catalyzed cascade C-H/N-H annulation of indole-2-carboxamides with benzoquinones has been developed for the synthesis of tetracyclic indolo[2,3-c]quinolinones. This reaction exhibits excellent chemo-/regioselectivity, achieving functionalization of the C-3 of indole and N-H of the amide moiety to form the new C-C and C-N bonds. Various expected products were synthesized from readily available starting materials in good to high yields with a wide substrate scope and good functional group tolerance. Among all synthetic products, I showed the most potent cytotoxicity toward the 4T1 cancer cell line with an IC50 value of 0.62 +/- 0.05μM. In vivo study demonstrated that I remarkably suppressed 4T1 xenograft tumor growth without body weight loss.

Journal of Organic Chemistry published new progress about Antitumor agents. 399-76-8 belongs to class indole-building-block, and the molecular formula is C9H6FNO2, Reference of 399-76-8.

Referemce:
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

Pedrazzani, Riccardo; Pinosa, Emanuele; Bertuzzi, Giulio; Monari, Magda; Lauzon, Samuel; Ollevier, Thierry; Bandini, Marco published the artcile< Convenient synthesis of tricyclic N(1)-C(2)-fused oxazino-indolones via [Au(I)] catalyzed hydrocarboxylation of allenes>, Electric Literature of 93247-78-0, the main research area is oxazinoindolone preparation; allenyl indole carboxylic acid hydrocarboxylation gold catalyst.

A new [Au(I)] catalyzed intramol. hydrocarboxylation of allenes was presented as a valuable synthetic route to oxazino[4,3-a]indolones I [R = H, Me, c-hexyl; R1 = H, 8-Me, 8-F, etc.]. The use of 3,5-(CF3)2-C6H3-ImPyAuSbF6 as the optimal catalyst (5 mol%) was necessary to guarantee (i) wide tolerance of functional groups, (ii) mild reaction conditions (r.t., 16 h), and (iii) high yields (up to 90%). Preliminary attempts toward an enantioselective version (81 : 19 er) were also documented by means of a new family of chiral C1-sym. ImPyAuCl complexes.

Chemical Communications (Cambridge, United Kingdom) published new progress about Carboxylation. 93247-78-0 belongs to class indole-building-block, and the molecular formula is C10H9NO2, Electric Literature of 93247-78-0.

Referemce:
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

Forster, Michael; Liang, Xiaojun Julia; Schroeder, Martin; Gerstenecker, Stefan; Chaikuad, Apirat; Knapp, Stefan; Laufer, Stefan; Gehringer, Matthias published the artcile< Discovery of a novel class of covalent dual inhibitors targeting the protein kinases BMX and BTK>, Application In Synthesis of 101083-92-5, the main research area is phenyl pyrrolopyridine prepare kinase inhibitor mol docking SAR; Bruton’s tyrosine kinase; Janus kinase 3; bone marrow tyrosine kinase on chromosome X; chemical probes; covalent inhibitors; tyrosine kinases.

Here a novel class of dual BMX/BTK inhibitors, which were designed from irreversible inhibitors of Janus kinase (JAK) 3 targeting a cysteine located within the solvent-exposed front region of the ATP binding pocket was presented. Structure-guided design exploiting the differences in the gatekeeper residues enabled the achievement of high selectivity over JAK3 and certain other kinases harboring a sterically demanding residue at this position. The most active compounds inhibited BMX and BTK with apparent IC50 values in the single digit nanomolar range or below showing moderate selectivity within the TEC family and potent cellular target engagement. These compounds represent an important first step towards selective chem. probes for the protein kinase BMX.

International Journal of Molecular Sciences published new progress about Acid chlorides Role: RCT (Reactant), RACT (Reactant or Reagent). 101083-92-5 belongs to class indole-building-block, and the molecular formula is C7H5N3O2, Application In Synthesis of 101083-92-5.

Referemce:
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