The stereospecific synthesis ofcis andtrans 1-oxabicyclo[4,4,0]decanes and 9-methoxycarbonyl-1-oxabicyclo[4,3,0]nonanes
作者:D. Neville Jones、M. Akram Khan、Sohail M. Mirza
DOI:10.1016/s0040-4020(99)00532-3
日期:1999.8
The allylic sulphoxides1b and1e reacted with 1-pyrrolidinylcyclohexene and 2-ethoxycarbonyl cyclopentanone to yield the 2-substituted keto-sulphoxides10 and14 respectively, which on reduction followed by oxidation yielded in each case a mixture ofcis andtrans sulphones that were separated by column chromatography. Base induced cyclisation followed by reductive desulphurisation of the cyclised sulphones