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- Thermal rearrangement of 3-allyloxy-1,2-benzisothiazole 1,1-dioxides: an unusual inversion of products of sigmatropic [3,3]-shift to give the [1,3]-IsomersPublication . Cristiano, Maria Lurdes Santos; Brigas, Amadeu; Johnstone, Robert A. W.; Loureiro, Rui M. S.; Pena, Paula C. A.3-Allyloxy-1,2-benzisothiazole 1,1-dioxides isomerize thermally to give [3,3]- and [1,3]-products 6 of sigmatropic shift, of which the former reacts further to give solely the [1,3]-isomer.