Mikhailova,V.N. et al., Journal of Organic Chemistry USSR (English Translation), 1970, vol. 6, p. 1263 - 1268
作者:Mikhailova,V.N. et al.
DOI:——
日期:——
Reactions of lithiated (E)-3-halo-1-phenylsulfonylprop-1-enes and (Z)-1-halo-3-phenylsulfonylprop-1-enes with aldehydes
作者:Eva T. Gallagher、David H. Grayson
DOI:10.1039/b300925b
日期:2003.4.14
(E)-3-Chloro-1-phenylsulfonylprop-1-ene and its iodo- and bromo- analogues, (Z)-1-iodo-3-phenylsulfonylprop-1-ene and (Z)-1-bromo-3-phenylsulfonylprop-1-ene, have each been successfully converted into lithiated carbanions which react regioselectively with aromatic aldehydes to give γ-alkylated products whose nature depends upon the halogen substituent: the chloro-sulfones yield (2Z)-1-aryl-2-chloro-4-phenylsulfonylbut-2-en-1-ols but the bromo- and iodo-derivatives behave differently, yielding (1E)-trans-4-aryl-3,4-epoxy-1-phenylsulfonylbut-1-enes. In sharp contrast, the same lithiated sulfones react with aliphatic aldehydes to give anti-configured β-hydroxysulfones which are formed via diastereoselective α-alkylation reactions.