Ethyl 3-[1-benzyloxy-3-(isoamyloxycarbonyl)cyclobutan-3-yl]-4-nitrobutanoate → 4-[1-Benzyloxy-3-(isoamyloxycarbonyl)cyclobutan-3-yl]-2-pyrrolidone

Participants

Reaction Conditions

Reaction Steps

A 11.45 g (25.26 mmol) portion of crude ethyl 3-[1-benzyloxy-3-(isoamyloxycarbonyl)cyclobutan-3-yl]-4-nitrobutanoate was dissolved in 200 ml of ethanol to which was subsequently added 10 ml of Raney nickel under an atmosphere of nitrogen. After replacing nitrogen with hydrogen, this was stirred at 50° C. for 5 hours under an atmosphere of hydrogen. After cooling in an ice bath, the reaction solution was filtered through celite and then the solvent was evaporated under a reduced pressure to give 6.51 g (19.5 mmol) of the title compound. The thus obtained compound was used in the following reaction without purification.

Provenance & Evidence