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