HCID 54283837, compound → HCID 54018756, compound

Participants

Reaction Steps

A solution of 250 mg (0.44 mmol) (R)-1-[[4-[2-[(R)-2-tert-butoxycarbonyl-pyrrolidin-1-yl]-2-oxo-ethoxy]-2-methoxy-phenoxy]-acetyl]-pyrrolidine-2- carboxylic acid tert-butyl ester in 4 ml trifluoroacetic acid was stirred for 3 h at room temperature. The solvent was removed in vacuo and the residue suspended in 10 ml ether. The resulting suspension was stirred overnight. Filtration and drying gave 188 mg (94%) of the title compound as a white powder. MS m/e (%): 473 (M+Na+, 45), 468 (M+NH4+, 24), 451 (M+H+, 100).

Provenance & Evidence