An efficient route to functionalized dienes for decalin synthesis
作者:John W. Benbow、Reeti Katoch、Bonnie L. Martinez、Steven B. Shetzline
DOI:10.1016/s0040-4039(97)00823-x
日期:1997.6
Reaction of the trimethylsilyl (TMS) enol ethers 6 derived from the conjugate addition of organo-copper reagents to 3,4-dimethylcyclopentenone with dimethyl dioxirane (DMDO) leads to α-hydroxy ketones 7 with predominantly the syn-methyl orientation. Exposure of these systems to methanolic leadtetraacetate (Pb(OAc)4) delivers aldehydic esters 8 which are homologated to the desired E-dienes 9 using