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Application of 60166-43-0, New Advances in Chemical Research in 2021. The appropriate choice of redox mediator can avoid electrode passivation and overpotential, which strongly inhibit the efficient activation of substrates in electrolysis. 60166-43-0, name is 1,4-Dimethyl-1H-1,2,3-triazole, molecular formula is C4H7N3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, below Introduce a new synthetic route.
In a pressure vessel equipped with a magnetic stirring bar was added 3-bromo-7- chloro-5-((4,4-difluorocyclohexyl)(phenyl)methyl)-5H-pyrrolo[2,3-b:4,5-b’]dipyridine (240 mg, 0.489 mmol), l ,4-dimethyl-lH-l ,2,3-triazole (52.2 mg, 0.538 mmol) and DMF (5 mL). Tetramethylammonium acetate (98 mg, 0.734 mmol) and PdCl2(dppf)-CH2Cl2 adduct (28.0 mg, 0.034 mmol) was added. Argon was bubbled into the mixture with sonication for 5 min, then the vessel was capped, placed into a preheated aluminum block set at 100C and was stirred for 16 h. Solids were filtered, and the filtrate was purified by preparative HPLC (20-100% B; B solvent 90% MeCN/0.1% TFA water, Phenomenex LUNA C18 30xl00mm, 10 micron, 30 mL/min flow rate, 254nm UV; Rt = 1 1.6 min.). Like fractions were concentrated and re-purified by preparative HPLC: Column: Waters XBridge C 18, 19 x 200 mm, 5-mupiiota particles; Mobile Phase A: 5 :95 methanol: water with lOmM NH40Ac; Mobile Phase B: 95:5 methanol: water with lOmM NFLtOAc; Gradient: 40-80% B over 15 min, then a 5-min hold at 100% B; Flow: 20 mL/min. Fractions containing the desired product were combined and dried via centrifugal evaporation to give 18 mg of a mixture of enantiomers. This material was subject to a chiral purification: Chiral SFC conditions: Chiralcel OJ-H preparative column, 30 x 250mm, 5muiotaeta; Mobile Phase: 15% methanol in CO2, 150 bar; Temp: 35C; Flow rate: 70.0 mL/min. for 25 min. ; UV monitored at 254nm; Injection: 0.25ml of ~9 mg/mL solution in MeOH (18 mg purified by stacked injection); Rt = isomer A: 13.8 min. ; isomer B: 18.3 min. Fractions containing the desired products were combined and dried via evaporation to give 6.9 mg (2%) of the isomer A with an average purity by LC/MS analysis was >99%. Fractions containing the desired products were combined and dried via evaporation to give 7.5 mg (3%) of the isomer B with an average purity by LC/MS analysis was >99%. Isomer A: Two analytical LC/MS injections were used to determine the final purity. Injection 1 conditions: Column: Waters BEH C18, 2.0 x 50 mm, 1.7muetaiota particles; Mobile Phase A: 5:95 ACN:water with 10 mM NlrUOAc; Mobile Phase B: 95:5 ACN:water with 10 mM NH4OAc; Temperature: 50C; Gradient: 0%B, 0-100% B over 3 min, then a 0.5-min hold at 100% B; Flow: 1 mL/min; Detection: UV at 220 nm. Rt = 1.76 min.; LC/MS (M+H) = 568.7. Injection 2 conditions: Column: Waters BEH C18, 2.0 x 50 mm, 1.7-muetaiota particles; Mobile Phase A: 5:95 methanol: water with 10 mM NFL Ac; Mobile Phase B: 95:5 methanol: water with 10 mM NFL Ac; Temperature: 50C; Gradient: 0%B, 0-100% B over 3 min, then a 0.5-min hold at 100% B; Flow: 0.5 mL/min; Detection: UV at 220 nm. Rt= 2.77 min.; LC/MS (M+H) = 568.7. Isomer B: Two analytical LC/MS injections were used to determine the final purity. Injection 1 conditions: Column: Waters BEH C18, 2.0 x 50 mm, 1.7mupiiota particles; Mobile Phase A: 5:95 ACN:water with 10 mM NH4OAc; Mobile Phase B: 95:5 ACN:water with 10 mM MLtOAc; Temperature: 50C; Gradient: 0%B, 0-100% B over 3 min, then a 0.5-min hold at 100% B; Flow: 1 mL/min; Detection: UV at 220 nm. Rt= 1.86 min.; LC/MS (M+H) = 568.7. Injection 2 conditions: Column: Waters BEH C18, 2.0 x 50 mm, 1.7-mupiiota particles; Mobile Phase A: 5:95 methanol: water with 10 mM MLtOAc; Mobile Phase B: 95:5 methanol: water with 10 mM MLtOAc; Temperature: 50C; Gradient: 0%B, 0-100% B over 3 min, then a 0.5-min hold at 100% B; Flow: 0.5 mL/min; Detection: UV at 220 nm. Rt= 2.73 min.; LC/MS (M+H) = 568.7. NMR (500MHz, DMSO-c e) delta 8.82 (d, J=8.1 Hz, 1H), 8.67 (s, 1H), 8.54 (br. s., 1H), 7.73 (d, J=8.1 Hz, 3H), 7.32 (t, J=7.5 Hz, 2H), 7.25 (t, J=7.3 Hz, 1H), 6.09 (br. s., 1H), 4.36 (s, 3H), 4.02 (s, 3H), 3.52 (br. s., 1H), 2.30 (s, 3H), 2.07 (br. s., 1H), 1.92 (d, J=7.3 Hz, 1H), 1.82 (br. s., 1H), 1.73 (br. s., 1H), 1.66 (br. s., 1H), 1.45 (d, J=12.1 Hz, 1H), 1.37 (br. s., 1H), 1.30 (d, J=11.7 Hz, 1H). LC/MS (M+H) = 568.2; HPLC conditions: Rt= 0.93 min. (Column: Waters Aquity BEH C18 2.1 X 50 mm 1.7u; Mobile Phase A: water with 0.05% TFA; Mobile Phase B: ACN with 0.05% TFA; Temperature: 40C; Gradient: 2-98% B over 1.5 min; Flow: 0.8 mL/min).
In the meantime we’ve collected together some recent articles in this area about 60166-43-0 to whet your appetite. Happy reading!
Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; NORRIS, Derek J.; VACCARO, Wayne; DEBENEDETTO, Mikkel V.; DEGNAN, Andrew P.; DELUCCA, George V.; DESKUS, Jeffrey A.; HAN, Wen-Ching; KUMI, Godwin Kwame; SCHMITZ, William D.; STARRETT, John E., JR.; HILL, Matthew D.; HUANG, Hong; (563 pag.)WO2016/183118; (2016); A1;,
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics