Lithium Hydroxide → (R)-2-(4-amino-3-methyl-5-nitro-phenyl)-1-carboxy-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Participants

Reaction Steps

A solution of 120 mg (5.0 mmol) LiOH in 5 mL water was metered into a solution of 1.0 g (1.8 mmol) (R)-2-(4-amino-3-methyl-5-nitro-phenyl)-1-methoxy-carbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate in 10 mL THF, the reaction solution was stirred for 4 h at RT and then evaporated down i.vac. The residue was combined with 30 mL water, washed with 30 mL diethyl ether, acidified with 4 M HCl while cooling with an ice bath and stirred for 30 min at RT. The precipitate was filtered off, washed with water and dried.

Provenance & Evidence