Stereochemically controlled synthesis of 1,8-dioxaspiro[4.5]decanes and 1-oxa-8-thiaspiro[4.5]decanes by phenylsulfanyl migration
作者:Jason Eames、David J. Fox、Maria A. de las Heras、Stuart Warren
DOI:10.1039/b001893g
日期:——
Single enantiomers and diastereoisomers of 2- and 3-alkyl-3-phenylsulfanyl-1,8-dioxa- and 1-oxa-8-thiaspiro[4.5]decanes can be prepared in good yield by acid-catalysed phenylsulfanyl (PhS-) migration. Either the syn- or anti-stereochemistry can be controlled by aldol reactions or by reduction of hydroxy-ketones.
可以通过酸催化以高收率制备2-和3-烷基-3-苯基硫烷基-1,8-二氧杂-和1-氧杂-8-硫杂螺[4.5]癸烷的单一对映异构体和非对映异构体 苯硫基(PhS-)迁移。无论是顺式-或反-立体化学可以通过羟醛缩合反应或由控制减少 羟基酮。