Category: indole-building-block

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1008-07-7,7-Chloro-1H-indole-3-carbaldehyde,as a common compound, the synthetic route is as follows.

A suspension of sodium hydride (557 mg, 60% dispersion in mineral oil, 13.9 mmol) in anhydrous THF (25 mL) was treated dropwise with a solution of 7-chloro-1 H-ndoe-3- carbaldehyde (1 .00 g, 5.57 mmol) dissolved in anhydrous THF (5 mL) at 23 C and stirred at 23 C for 15 min. The mixture was treated with Mel (0.45 mL, 7.24 mmol), stirred at 23 C for 1 h and treated with MeOH (10 mL). The solvent was evaporated, the residue was dissolved in water (50 mL), acidified with 1 M HCI to pH 2 and extracted with CH2CI2 (3 x 30 mL). The combined organic layers were dried over anhydrous MgS04, filtered and evaporated. Column chromatography (S1O2; EtOAc/Heptane 30:70 -> 50:50) of the crude gave 7-Chloro-1 -methyl-1 A indole-S-carbaldehyde (800 mg, 74%) as a yellow solid.H NMR (400 MHz, Chloroform-d1 delta = 9.91 (s, 1 H, CHO), 8.18 (dd, J= 7.8, 1.2 Hz, 1 H, H-Ar), 7.54 (s, 1 H, H-Ar), 7.22 (dd, J= 7.7, 1 .2 Hz, 1 H, H-Ar), 7.16 – 7.12 (m, 1 H, H-Ar), 4.14 (s, 3H, CH3) ppm.MS (ESI+, H20/MeCN) /z {%): 194.2 (100, [M + H]+)., 1008-07-7

1008-07-7 7-Chloro-1H-indole-3-carbaldehyde 643958, aindole-building-block compound, is more and more widely used in various fields.

Reference：
Patent; EUROPEAN MOLECULAR BIOLOGY LABORATORY; WILL, David William; REID, George; CHARAPITSA, Iryna; LEWIS, Joe; (138 pag.)WO2018/229197; (2018); A1;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.6127-17-9,6-Chloro-2-methyl-1H-indole,as a common compound, the synthetic route is as follows.

6127-17-9, To a stirred solution of compound 6 (900 mg, 5.45 mmol) in CH2C12 (60 mL) under inert atmosphere was added NCS (750 mg, 5.45 mmol) at 0 C. The reaction mixture was warmed to RT and stirred for 1 h. Then compound 7 (1 g, 5.45 mmol) was added to the reaction mixture at RT, and the reaction mixture was stirred for 16 h. The reaction progress was monitored by TLC; after reaction completion, the reaction mixture was diluted with water (50 mL) and extracted with CH2C12 (2 x 50 mL). The combined organic extracts were washed with water (50 mL), brine solution (50 mL), dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude material. The crude material was purified through silica gel flash column chromatography using 15% EtOAc/ hexanes to afford compound 8 (700 mg, 37%) as colorless oil. 1H NMR (500 MHz, CDC13): oe 8.30- 8.28 (m, 1H), 7.78 (s, 1H), 7.72 (d, J 8.0 Hz, 1H), 7.40 (d, J 8.0 Hz, 1H), 7.34-7.33 (m, 1H), 7.20 (t, J= 8.0 Hz, 1H), 7.12-6.98 (m, 2H), 4.33-4.28 (m, 2H), 2.53 (s, 3H), 1.37 (t, J= 6.00 Hz, 3H); LCMS: 88.9%; (M-H) Found=344.2; (column: X Bridge C-18, 50 x 3.0 mm, 3.5 jim); RT 4.51 mm. 5 mM NH4OAc: ACN; 0.8 mL/min).

6127-17-9 6-Chloro-2-methyl-1H-indole 271553, aindole-building-block compound, is more and more widely used in various fields.

Reference：
Patent; PHARMAKEA, INC.; HUTCHINSON, John, Howard; LONERGAN, David; HUANG, Fei; ROWBOTTOM, Martin; CALDERON, Imelda; WO2015/48301; (2015); A1;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.31241-19-7,5-Methoxy-2,3,3-trimethyl-3H-indole,as a common compound, the synthetic route is as follows.,31241-19-7

General procedure: 2,3,3-Trimethylindolenine (1 g, 12.56 mmol), acetonitrile (50 mL),and methyl idodide (0.94 mL, 15.072 mmol) were refluxed at 80 C for 7 h. The resulting pink precipitate was filtered and washed with ice-cooled chloroform. Yield: 37%.

As the paragraph descriping shows that 31241-19-7 is playing an increasingly important role.

Reference：
Article; Kim, Bo Hyung; Park, Se Woong; Lee, Donghyun; Kwon, I. I. Keun; Kim, Jae Pil; Bulletin of the Korean Chemical Society; vol. 35; 8; (2014); p. 2453 – 2459;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.434958-85-7,N-Boc-5-Hydroxyindole,as a common compound, the synthetic route is as follows.,434958-85-7

General procedure: A suspension of bismacycle tosylate 1-OTs (1.0 equiv.; initial concentration = 0.05 M),K2CO3 (1.2 equiv.) and arylboronic acid (1.1 equiv.) in toluene/water (99:1,v/v) was stirred at 60 C for 2 h. After cooling to room temperature, substrates(naphthols, 0.90 equiv.; phenols, 3.0 equiv.) and mCPBA (titrated; 1.5 equiv.) were added. The reaction was stirred for 10 min at room temperature and then methanol (2 ml) was added. The mixture was diluted with diethyl ether and washed witha saturated aqueous solution of KHCO3. The organic phase was separated, dried (MgSO4), filtered and concentrated in vacuo before purification by flash column chromatography on silica gel. Following isolation of the desired arylation product, bismacycle acetate 1-OAc can be recovered by flushing the column with diethyl ether to remove organic impurities before elution with 2% acetic acid in methanol.

434958-85-7 N-Boc-5-Hydroxyindole 22596220, aindole-building-block compound, is more and more widely used in various fields.

Reference：
Article; Ball, Liam T.; Jurrat, Mark; Lewis, William; Maggi, Lorenzo; Nature Chemistry; vol. 12; 3; (2020); p. 260 – 269;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.16732-69-7,Ethyl 7-bromo-1H-indole-2-carboxylate,as a common compound, the synthetic route is as follows.

General procedure: A mixture of lactam(1.0 eq),bromide(2.0 eq),Cul(0.5 eq),(trans)-1,2-N,Ndimethylaminocyclohexane(1.0 eq),and K2C03(2.5 eq) in toluene(1 mL) was sparged withArgas for 5 min. The reaction mixture was sealed and heated to 110 C for 18 h. Same workup and purification protocols described in general coupling procedure A were followed toobtaine a desire product., 16732-69-7

16732-69-7 Ethyl 7-bromo-1H-indole-2-carboxylate 7017885, aindole-building-block compound, is more and more widely used in various fields.

Reference：
Patent; VANDERBILT UNIVERSITY; LEE, Taekyu; TARR, James, C.; JEON, Kyuok; SALOVICH, James, M.; SHAW, Subrata; VEERASAMY, Nagarathanam; KIM, Kwangho; CHRISTOV, Plamen, P.; OLEJNICZAK, Edward, T.; ZHAO, Bin; FESIK, Stephen, W.; BIAN, Zhiguo; (526 pag.)WO2017/152076; (2017); A1;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.90924-06-4,1-Methyl-4-indolecarboxylic Acid,as a common compound, the synthetic route is as follows.

90924-06-4, To a stirred SOLUTION OF 4- [ (Z)- (4-BROMOPHENYL) (ethoxyimino) methyl]-1- (4-methyl-4- piperidinyl) piperidine (50 mg, 0.12 MMOL), 1-METHYL-1 H-indole-4-carboxylic acid (23 mg, 0.13 MMOL), and Et3N (24.3 mg, 0.24 MMOL) in DMF (2 mL), HATU (60.8 mg, 0.16 MMOL) was added at room temperature. After 16 h the mixture was poured into ice water (10 mL), and extracted with CH2CI2 (3X10 mL). The organic phase was dried over NA2SO4, and concentrated in vacuo. Purification by preparative TLC afforded title compound as a light YELLOW OIL. H NMR (CDCl3, 400MHz) 8 0.93 (s, 3H), 1.2 (t, 3H), 1.24-2. 2 (m, 11 H), 2.34-2. 46 (m, 1H), 2.76-2. 9 (m, 1 H), 2.9- 3.1 (m, 1H), 3.1-3. 3 (m, 1 H), 3.3-3. 7 (m, 2H), 3.78-3. 84 (s, 3H), 4.02-4. 18 (q, 2H), 6.4-6. 6 (m, 1H), 7.08-7. 14 (m, 4H), 7.19-7. 25 (m, 1H), 7.32-7. 36 (m, 1H), 7.48-7. 56 (m, 2H).

90924-06-4 1-Methyl-4-indolecarboxylic Acid 14987287, aindole-building-block compound, is more and more widely used in various fields.

Reference：
Patent; SCHERING AKTIENGESELLSCHAFT; WO2004/113323; (2004); A1;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2795-41-7,6-Fluoroindole-3-carboxaldehyde,as a common compound, the synthetic route is as follows.

General procedure: The van Leusen reaction was conducted as describedpreviously [37]. Aromatic aldehyde (3 mmol) was mixed withamine (15 mmol) in 20 mL of dry methanol. The reaction mixturewas left overnight to complete imine formation, although thisprocess can be monitored by this layer chromatography (TLC) (SiO2/CHCl3). Anhydrous K2CO3 (3 mmol) and TosMIC (tosylmethylisocyanide,3 mmol) were subsequently added. The mixture was stirredfor an additional 8 h, diluted with 50 mL of H2O, and extractedthree times with 20 mL of ethyl acetate. The combined extractswere washed twice with 20 mL of H2O, and once with 20 mL ofbrine, treated with anhydrous magnesium sulfate and evaporated.The final products were purified either by trituration under a 2:1hexane:isopropanol mixture, or chromatography on a short silicagelbed. The unreacted aldehydes were eluted with ethyl acetate orchloroform, and a mixture of AcOEt:MeOH or CHCl3:MeOH wasthen applied to elute the product.

2795-41-7, As the paragraph descriping shows that 2795-41-7 is playing an increasingly important role.

Reference：
Article; Hogendorf, Adam S.; Hogendorf, Agata; Popio?ek-Barczyk, Katarzyna; Ciechanowska, Agata; Mika, Joanna; Sata?a, Grzegorz; Walczak, Maria; Latacz, Gniewomir; Handzlik, Jadwiga; Kie?-Kononowicz, Katarzyna; Ponimaskin, Evgeni; Schade, Sophie; Zeug, Andre; Bijata, Monika; Kubicki, Maciej; Kurczab, Rafa?; Lenda, Tomasz; Staro?, Jakub; Bugno, Ryszard; Duszy?ska, Beata; Pilarski, Bogus?aw; Bojarski, Andrzej J.; European Journal of Medicinal Chemistry; vol. 170; (2019); p. 261 – 275;,
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

399-51-9, 6-Fluoro-1H-indole is a indole-building-block compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Trifluoroacetic anhydride (9.009 ml, 64.8 mmol, 2.2 equiv.) was added drop wise to a stirring solution of 6-fluoroindole (4.000 g, 29.6 mmol, 1.0 equiv.) in DMF (25 mL) at 0C (external ice bath temperature). After 3 hours in the ice bath the mixture was quenched with 40 mL of 2N sodium carbonate. The precipitate was collected by filtration and washed with water. The solid was taken up in 4M NaOH (50 mL) and refluxed for 4 hours. The reaction mixture was cooled to room temperature and poured into 50 mL of water. The mixture was cooled in an ice bath and slowly brought to pH 3 with 6N HCl. The precipitate which formed was collected by filtration, washed with water and dried under vacuum to give an off -white solid (3.5 g, 66%). 1H NMR (DMSO-d6, 300 MHz): 12.03 (bs, 1H), 11.87 (s, 1H), 7.99-7.92(m, 2H), 7.23 (dd, J=9.9 & 2.4 Hz, 1Eta),7.03-6.97 (m, 1H)., 399-51-9

The synthetic route of 399-51-9 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; BUCK INSTITUTE FOR RESEARCH ON AGING; JOHN, Varghese; BREDESEN, Dale, E.; SPILMAN, Patricia, R.; JAGODZINSKA, Barbara; (85 pag.)WO2017/197177; (2017); A1;,
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

5192-03-0, 1H-Indol-5-amine is a indole-building-block compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

DMSO (10 L, 11 kg), 2-amino-3,5-dibromopyrazine (1) (4.5 kg, 17.8 mol, 1 eq.), 5- amino indole (2) (3.06 kg, 23.15 mol, 1.3 eq.) and triethylamine (7.4 L, 5.4 kg, 53.36 mol, 3 eq.) were charged to a reactor. The reaction mixture was heated to 95C while agitated. After 12 hours, the heating was discontinued and the conversion was 88% of 2-amino-3,5-dibromopyrazine. The reaction was heated again to 95C and agitated for an additional 2.5 hours. There was no improvement in conversion. The reaction mixture was agitated at ambient temperature overnight. Triethylamine (3.5 kg) was removed under vacuum and the remaining reaction mixture was transferred to a stainless steel container from which it was charged into another reactor. Subsequently, 8.4 kg of 50% acetic acid (aq.) was introduced over a period of 20 minutes under agitation, followed by purified water (61 L) charged over a period time of 60 minutes. The slurry was then filtered and the isolated material was washed with 2 x 20 L of 1 % acetic acid (aq.). The isolated 3-bromo-N-3-(1H-indol-5-yl)-pyrazine-2,3-diamine) (3) was transferred to a drying cabinet and dried to invariable weight at 40±3C, (19 hours), to afford 4.36 kg, 14.34 mol, 81 % yield, with a purity of 96% by HPLC. The reaction temperature in the batch record was set to be 130-135C. However, at 95C the reaction mixture was at reflux., 5192-03-0

As the paragraph descriping shows that 5192-03-0 is playing an increasingly important role.

Reference：
Patent; AKINION PHARMACEUTICALS AB; LEHMANN, Fredrik; BREMBERG, Ulf; SOeLVER, Ellen; ERIKSSON BAJTNER, Johan; THORNQVIST OLTNER, Viveca; WO2013/89636; (2013); A1;,
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

434958-85-7, N-Boc-5-Hydroxyindole is a indole-building-block compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

1-(tert-Butoxycarbonyl)-5-hydroxyindole (2.33 g, 10.0 mmol) and triphenylphosphine (5.25 g, 20.0 mmol) were dissolved in toluene (46.0 mL), and the solution was added with glycidol (1.32 mL, 20.0 mmol) and 40% DEAD-toluene solution (9.10 mL, 20 mmol) at room temperature, followed by stirring at 80C for 4 hours. The solvent was evaporated under reduced pressure and the residue was purified by flash column chromatography (hexane/ethyl acetate=4/1). A crude product (1.28 g) of 1-(tert-butoxycarbonyl)-5-hydroxyindole (1.28 g) was obtained. The obtained crude product was dissolved in N,N-dimethylacetoamide (20.0 mL), and the solution was added with 2- (ethylamino) ethanol (8.60 mL, 87.8 mmol), followed by stirring at 80C for 4 hours. The reaction mixture was added with water and extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by flash column chromatography (chloroform/methanol =9/1) to obtain 1-(tert-butoxycarbonyl)-5-{3-[N-ethyl(2-hydroxyethyl)amino]-2-hy droxypropoxy}indole (1.53 g, 40%). ESI-MS m/z: 379 [M+H]+; 1H-NMR (CDCl3)delta(ppm): 1.07 (t, J = 7.2 Hz, 3H), 1.66 (s, 9H), 2.61-2.80 (m, 6H), 3.61-3.68 (m, 2H), 3.99-4.14 (m, 3H), 6.48 (d, J = 3.9 Hz, 1H), 6.94 (dd, J = 2.6, 8.7 Hz, 1H), 7.04 (d, J = 2.6 Hz, 1H), 7.56 (d, J = 3.9 Hz, 1H), 8.01 (d, J = 8.7 Hz, 1H).

434958-85-7, The synthetic route of 434958-85-7 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Kyowa Hakko Kirin Co., Ltd.; EP2108642; (2009); A1;,
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