作者:Kaoru Fuji、Yoshihide Usami、Yoshimitsu Kiryu、Manabu Node
DOI:10.1055/s-1992-26246
日期:——
The reaction of 4-lithio-2,2-dimethyl-1,3-oxathiane 3,3-dioxide with various electrophiles is presented. Acylation of the anion provided labile 4-acyl-2, 2-dimethyl-1,3-oxathiane 3,3-dioxides which underwent desulfonation with silica gel to produce γ-hydroxy ketones with three carbon unit elongation. Thus, 4-lithio-2,2-dimethyl-1,3-oxathiane 3,3-dioxide was shown to be a useful synthetic equivalent of a γ-hydroxypropyl anion. Methyl esters proved to be the best acylating agents in this reaction. Synthetic utility of this carbon chain elongation was illustrated by the syntheses of dl-lanceol and dl-dihydrojasmone.
4-锂-2,2-二甲基-1,3-噁硫烷-3,3-二氧化物与各种电亲体的反应结果被呈现。对阴离子的酰化提供了不稳定的4-酰基-2,2-二甲基-1,3-噁硫烷-3,3-二氧化物,这些化合物与硅胶脱磺反应,生成了具有三个碳单位延长的γ-羟基酮。因此,4-锂-2,2-二甲基-1,3-噁硫烷-3,3-二氧化物被证明是一种有用的γ-羟基丙基阴离子的合成等价物。甲基酯在这个反应中被证明是最佳的酰化试剂。这种碳链延长的合成实用性通过合成dl-兰索尔和dl-二氢茉莉酮得到了说明。