Stereoselective synthesis of (4S,5R,6S)-4-(5,6-epoxy-6-phenyl)-γ-lactone
摘要:
A short (7 steps) and efficient (45% overall yield) synthesis of (4S,5R,6S)-4-(5,6-epoxy-6-phenyl)-gamma-lactone, a versatile intermediate toward possible HIV-1 protease inhibitors, is described. Two examples of trans-alpha-benzylation of the lactonic ring followed by a regioselective opening of the epoxide (with thiopropanamide) as well as an opening of the lactone ring with L-valine (2-methoxy-ethyl)-amide are also given. Copyright (C) 1996 Elsevier Science Ltd
Stereoselective synthesis of (4S,5R,6S)-4-(5,6-epoxy-6-phenyl)-γ-lactone
摘要:
A short (7 steps) and efficient (45% overall yield) synthesis of (4S,5R,6S)-4-(5,6-epoxy-6-phenyl)-gamma-lactone, a versatile intermediate toward possible HIV-1 protease inhibitors, is described. Two examples of trans-alpha-benzylation of the lactonic ring followed by a regioselective opening of the epoxide (with thiopropanamide) as well as an opening of the lactone ring with L-valine (2-methoxy-ethyl)-amide are also given. Copyright (C) 1996 Elsevier Science Ltd
multicomponent reaction that generates functionalized 1,4-dicarbonyl motifs via formal hydrocarbonylation of activated alkynes with propargylamines and water under metal-free conditions. This novel synthesis method utilizes propargylamines and water as carbonyl and proton precursors in which propargylamines are activated in situ by alkynes for α-C(sp3)–H activation and C–N bond cleavage. This method