反应详情

To a suspension of (E)-(S)-5-biphenyl-4-yl-4-tert-butoxycarbonylamino-2-methylpent-2-enoic acid 3(ii-b) (10 g, 26.2 mmol) and triethylamine (3.6 ml, 26.2 mmol) in isopropyl acetate is added palladium on carbon (1 g, 10% loading). Hydrogen atmosphere is then applied for 5 h. Upon filtering off the catalyst, the solvent is removed in vacuo to give the title compound {3(i-d): 3(i-c) 80:20 ratio; 3(i-d): 3(i-c) 99.9:0.1 ratio upon recrystallization; as determined by HPLC analysis}.

1. filtrationUpon filtering off the catalyst
2. customthe solvent is removed in vacuo