(S)-3-(tert-Butoxycarbonylamino)-1-(4-vinyl-5-isoquinolinesulfonyl)pyrrolidine → (S)-3-(tert-Butoxycarbonylamino)-1-(4-ethyl-5-isoquinolinesulfonyl)pyrrolidine

Participants

Reaction Steps

A solution of Intermediate 6a (120 mg) obtained in Example 9-1, Step A in ethanol (2 ml) was added with 10% palladium/activated carbon (90 mg, Wako Pure Chemical Industries), and the mixture was stirred at room temperature for 72 hours under a hydrogen gas atmosphere. The atmosphere was replaced with nitrogen gas, and then the insoluble solids were removed by filtration through Celite. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (n-hexane:ethyl acetate=2:1) to obtain the title compound (195 mg).

Provenance & Evidence