Enantioselective total syntheses of (−)-clasto-lactacystin β-lactone and 7-epi-(−)-clasto-lactacystin β-lactone
作者:Christopher J. Hayes、Alexandra E. Sherlock、Matthew D. Selby
DOI:10.1039/b516311k
日期:——
An alkylidene carbene 1,5-CH insertion has been used as a key step in an efficient enantioselective total synthesis of (-)-clasto-lactacystin beta-lactone, and its C7-epimer. An additional noteworthy feature of the synthesis is the use of a novel oxidative deprotection procedure, utilizing DMDO, for the conversion of a late-stage benzylidene acetal into a primary alcohol and a secondary benzoate ester
亚烷基卡宾1,5-CH插入已被用作(-)-clato-lactacystinβ-内酯及其C7-顶基的有效对映选择性全合成的关键步骤。合成的另一个值得注意的特征是使用新颖的氧化脱保护程序,利用DMDO,将后期的亚苄基乙缩醛转化为伯醇和仲苯甲酸酯。