摘要:
An efficient synthesis of the HIV-1 protease inhibitor LB71350 (1) is described. High diastereoselective epoxidation of the cis-allylic carbamate fragment of (5S)-[N-(benzyloxycarbonyl)-amino]-N-[2-methyl-(1R)-[(phenyl)carbonyl]-propyl]-6-phenylhex- (Z)-enamide (16) and one-pot preparation of N-[(1-methylethoxy)carbonyl]-3-(methylsulfonyl)-L-valine (4) are the key features of the synthesis.