1,2-Dichloroethane → methyl 2-bromo-8-chloro-7-methoxy-5H-pyrido[3,2-b]indole-4-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

1,2-Dichloroethane (0.1 mL) was added to a mixture of methyl 3-azido-6-bromo-2-(3-chloro-4-methoxyphenyl)isonicotinate (56 mg, 0.14 mmol), rhodium octanoate dimer (11 mg, 0.014 mmol) and crushed 4 A° molecular sieves (56 mg) in a microwave vial. The vial was sealed and heated at 60° C. overnight. The reaction was diluted with dichloromethane, filtered, and the solvents removed from the filtrate. Radial silica gel chromatography (step gradient with hexane containing 50 to 100% methylene chloride) of the residue afforded methyl 2-bromo-8-chloro-7-methoxy-5H-pyrido[3,2-b]indole-4-carboxylate (29 mg). MS (ESI) m/z 370.9 (M+H). 1H NMR (CDCl3) δ ppm 9.51 (1H, br. s.), 8.31 (1H, s), 7.89 (1H, s), 6.99 (1H, s), 4.05 (3H, s), 4.01 (3H, s).

Herkunft & Nachweise