The scope and limitation of the [1,4]-SPh shift in the synthesis of allylic alcohols†
作者:Varinder K. Aggarwal、Jason Eames、Maria A. de las Heras、Sara McIntyre、Stuart Warren
DOI:10.1039/b005349j
日期:——
Treatment of a series of 4-phenylsulfanyl-1,3-diols with toluene-p-sulfonyl chloride in pyridine gives stereospecifically substituted allylicalcohols in near quantitative yield via a [1,4]-SPh shift. We comment on the structural variation at both the migration origin and terminus on the outcome of the title reaction and define its limits.
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.