作者:Jhillu Yadav、Eedubilli Srinivas、Chinta Suresh Kumar、Ahmad Al Khazim Al Ghamdi
DOI:10.1055/s-0031-1290155
日期:2012.2
The asymmetric total synthesis of both enantiomers of (+)- and (-)-vittatalactone has been achieved using a desymmetrization strategy to create three methyl chiral centers. The key steps in these total syntheses are Myers asymmetric alkylation, copper-catalyzed alkylation, 2,2,6,6-tetramethyl-1-piperidinyloxyl-(diacetoxyiodo)benzene [TEMPO-PhI(OAc2)] promoted oxidation and p-toluenesulfonyl chloride
(+)-和(-)-五内酯的两种对映异构体的不对称全合成已使用去对称化策略创建了三个甲基手性中心。这些全部合成过程中的关键步骤是Myers不对称烷基化,铜催化的烷基化,2,2,6,6-四甲基-1-哌啶基氧基-(二乙酰氧基碘)苯[TEMPO-PhI(OAc 2)]促进的氧化和对甲苯磺酰基氯化物介导的内酯化作用。使用线性合成序列以良好的总收率获得产物。 季戊内酯-脱对称-Myers不对称烷基化-铜催化烷基化-内酯化