(S)-alpha-(1-hydroxyalkyl)vinyl sulfoxides (S)-5 with alkyl radicals and tributyltin hydride gave the addition-hydrogenation products with high diastereoselectivity, whereas the reaction with (R)-alpha-(1-hydroxyalkyl)vinyl sulfoxides (R)-5 resulted in complete recovery of the starting sulfoxides. Stereoselective intramolecular hydrogen bonding between the hydroxy group and the diastereotopic sulfonyl oxygen led to high
Synthesis of allylic sulphides and selenides by lewis acid mediated displacement reactions of sulphones
作者:Nigel S. Simpkins
DOI:10.1016/s0040-4039(00)82455-7
日期:——
Allylic sulphides or selenides are produced by reaction of appropriate α-sulphonyl sulphides or selenides with allyltrimethylsilane in the presence of EtAlCl2.