m-Chloroperbenzoic acid → 5-(2-chlorophenyl)-1,2,3,6,7,9-hexahydro-3-hydroxy-1-(2-phenylethyl)-8H-pyrido[4',3':4,5]thieno[2,3-e]-1,4-diazepine-2-one

Participants

Reaction Steps

t-butyl 5-(2-chlorophenyl)-1,2,3,6,7,9-hexahydro-2-oxo-1-(2-phenylethyl)-8H-pyrido[4′,3′:4.5]thieno[2,3-e]-1,4-diazepine-8-carboxylate (22 g, 41 mmol) is dissolved a 23° C. in 1,2-chloro ethane (320 ml). Meta-chloroperoxybenzoic acid at 85% (21.6 g, 0.1 mol) is added. Agitation is carried out for 24 hours at 23° C. then a solution of 5N sodium hydroxide (400 ml) is added. After decanting, the organic phase is washed with water, dried over magnesium sulphate, filtered and concentrated with a rotary evaporator. After purification by chromatography on a silica column (eluent: ethyl acetate-heptane: 50-50 to 80-20), the fractions containing only the product ae evaporated. The solid obtained is agitated in a mixture of solvents: isopropyl ether-isopentane (20-80). After filtration on frit and washing with isopentane, the desired product is obtained in the form of a white powder (5.9 g, 26%).

Provenance & Evidence