3-(3,4-Difluoro-phenoxy)-hexahydro-pyrrolo[3,2-b]pyrrole-1,4-dicarboxylic acid 4-benzyl ester 1-tert-butyl ester → 3-(3,4-Difluoro-phenoxy)-hexahydro-pyrrolo[3,2-b]pyrrole-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

A mixture of compound 21 (3.8 g, 8.0 mmol) and 10% Pd-on-carbon (wet, 500 mg) in MeOH/EtOAc (1:1, 100 mL) was pressurized to 50 PSI H2 and shaken for 3 h using a Parr apparatus. The reaction mixture was filtered through a pad of celite and the solids were washed with EtOAc. The clarified filtrate was concentrated in vacuo to give 22 (2.8 g, 100%). The crude product was used without further purification. Mass spectrum, m/z [341.1] (M+H)+.

Provenance & Evidence