Different pi -deficient arylsulfonyl groups have been studied as candidates
for the stabilization of a-sulfonyl esters. The 3,5-bis(trifluoromethyl)ph
enylsulfonyl group has been shown to be the best substituent for the stereo
selective synthesis of E-aconitates by a dialkylation-dehydrosulfinylation
integrated process under PTC conditions using K2CO3 as base. (C) 2001 Elsev
ier Science Ltd. All rights reserved.