Water → 2,3,4,5-tetrahydro-5-methyl-2-[(4-methyloxazol-5-yl)methyl]-1H-pyrido[4,3-b]indol-1-one

Participants

Reaction Steps

Sodium hydride (60% dispersion in oil; 600 mg) was added to a stirred suspension of 2,3,4,5-tetrahydro-5-methyl-1H-pyrido[4,3-b]indol-1-one (1.5 g) in dry DME (150 ml) and then the mixture was stirred at 60° for 5 h under nitrogen. 5-Chloromethyl-4-methyloxazole (1.2 g) was added and the mixture was stirred overnight. A further quantity of sodium hydride (60% dispersion in oil; 600 mg) was added and the mixture was stirred at 60° for 4 h, then cautiously treated with water (100 ml). The mixture was extracted with dichloromethane containing methanol (ca. 1%) (3×100 ml) and the combined extracts were evaporated. The residue was purified by FCC eluting with System A (100:8:1) to give the title compound (300 mg) as a solid, t.l.c. (System A, 100:8:1) Rf 0.4.

Provenance & Evidence