A new strategy for the transformation of terminalalkynes to branched allylic sulfones was developed. Using a Rh(I)/DPEphos/benzoic acid catalyst system, terminalalkynes react with sulfonyl hydrazides to produce branched allylic sulfones with good to excellent yields and selectivities in general.
Dramatic solvent effects and stereospecificity in allylic sulphinate–sulphone rearrangements
作者:Kunio Hiroi、Ryuichi Kitayama、Shuko Sato
DOI:10.1039/c39830001470
日期:——
Dramaticsolventeffects were observed in the thermolysis of allyl sulphinates; heating of chiral trans- and cis-allyl sulphinates (S)-(–)-(1a–g) in N,N-dimethylformamide at 90–120 °C provided chiral sulphones (2a–d) in good yields with very high stereospecificity.