Tin-Pummerer Rearrangement in the Synthesis of O,S-Acetal Derivatives.
摘要:
alpha-Thioalkyl esters and carbonates have been prepared by a tin-Pummerer rearrangement in reactions of alpha-stannylated sulfoxides with acid chlorides or chloroformates, respectively. Acid chlorides have a higher reactivity than chloroformates in this reaction.
Neighbouring group effects in a Pummerer-type rearrangement: A facile entry into 3,1-benzoxathiins
作者:Ian D. Kersey、Colin W.G. Fishwick、John B.C. Findlay、Peter Ward
DOI:10.1016/0040-4020(95)00315-y
日期:1995.6
Arylmethyl sulphoxides treated with trialkylsilyl halide and base undergo a Pummerer-type rearrangement to give α-siloxy and α-chlorosulphides. However, the presence of an ortho hydroxymethyl group results in the exclusive and efficient formation of the α-chlorosulphides, presumably mediated via an intramolecular attack to yield an alkoxysulphonium salt. These 2-(hydroxymethyl)aryl chloromethylsulphides
The chemistry of O-silylated ketene acetal; Pummerer rearrangement of sulfoxides into α-siloxysulfides
作者:Y. Kita、H. Yasuda、O. Tamura、F. Itoh、Y. Tamura
DOI:10.1016/s0040-4039(01)91232-8
日期:1984.1
Treatment of sulfoxides with ketene silyl acetal in anhydrous acetonitrile in the presence of a catalytic amount of zinc iodide causes a Pummerer rearrangement to give α-siloxysulfides under extremely mild conditions.