作者:Alan P. Marchand、V. Satish Kumar、H. K. Hariprakasha
DOI:10.1021/jo001611c
日期:2001.3.1
oxygen without concomitant rearrangement are delineated. A key step in the first of these methods employs m-CPBA promoted "double Criegee rearrangement", which was used to convert pentacyclo[6.3.0.0(2,6).0(3,10).0(5,9)]undecan-4-one diethyl acetal (11) into 7,9-dioxapentacyclo-[8.3.0.0(2,6).0(3,12).0(5,11)]tridecan-8-one (12). Subsequently, 12 was converted into 4-oxapentacyclo[6.3.0.0(2,6).0(3,10).0(5,9)]undecane
五环[6.3.0.0(2,6).0(3,10).0(5,9)] undecan-4-one(1)的m-CPBA促进的Baeyer-Villiger氧化,在93中提供相应的内酯2 % 让。氢化铝锂可促进在BF(3).OEt(2)试剂存在下进行的内酯2、6和9的还原,分别提供相应的笼型醚,即4,7和10。描绘了两种可被醚氧取代笼状C = O基团而无伴随重排的方法。这些方法中的第一个关键步骤是使用m-CPBA促进的“双重Criegee重排”,该转换用于转换五环[6.3.0.0(2,6).0(3,10).0(5,9)]将十一烷-4-一二乙缩醛(11)转变成7,9-二氧杂戊环-[8.3.0.0(2,6).0(3,12).0(5,11)]三苯甲酰胺-8-一(12)。随后,将12转化为4-氧杂五环[6.3.0.0(2,6).0(3,10).0(5,9)]十一烷(14)通过两步还原-脱水反应序列。第二种方