REVERSE-COPE-CYCLIZATIONS OF THIAHYDROXYLAMINES DERIVED FROM THE ADDITION OF ALLYLIC THIOLS TO NITRONES - SYNTHESES OF 1,3-THIAZOLIDINE-N-OXIDES AND 1,5,2-OXATHIAZINANES
Mp. Coogan et al., REVERSE-COPE-CYCLIZATIONS OF THIAHYDROXYLAMINES DERIVED FROM THE ADDITION OF ALLYLIC THIOLS TO NITRONES - SYNTHESES OF 1,3-THIAZOLIDINE-N-OXIDES AND 1,5,2-OXATHIAZINANES, Tetrahedron letters, 38(49), 1997, pp. 8549-8552
Allylthiols 7 react as nucleophiles with nitrones 8 to give intermedia
te thiahydroxylamines which undergo reverse-Cope cyclisations to provi
de 1,3-thiazolidine-N-oxides 9; in the case of derivatives of C-phenyl
nitrone, thermolysis results in smooth Meisenheimer rearrangement lea
ding to the 1,5,2-oxathiazinane 14. (C) 1997 Elsevier Science Ltd.