A quantitative structure–reactivity relationship in decarboxylative Claisen rearrangement reactions of allylic tosylmalonate esters
作者:Donald Craig、Nikolay K. Slavov
DOI:10.1039/b812306c
日期:——
First-order rate constants have been determined for the decarboxylative Claisen rearrangement reactions at 293 K of substituted methyl (E)-3-phenyl-2-propenyl 2-tosylmalonate esters, which show a linear free-energy relationship indicative of the development of positive charge on the benzylic position in the sigmatropicrearrangementtransition-state.
A [3,3]-sigmatropic process catalysed by acetate. The decarboxylative Claisen rearrangement
作者:Damien Bourgeois、Donald Craig、Fabienne Grellepois、David M. Mountford、Alan J.W. Stewart
DOI:10.1016/j.tet.2005.09.073
日期:2006.1
Allylic tosylacetates and tosylmalonates undergo acetate-catalysed decarboxylative Claisen rearrangement in the presence of N,O-bis(trimethylsilyl)acetamide. The homoallylic sulfones formed in these transformations correspond to the products of regiospecific allylation of sulfone-stabilised carbanions. A mechanistic rationale is proposed. (c) 2005 Elsevier Ltd. All rights reserved.