Aj. Clark et al., SYNTHESIS OF STYRYL TETRAHYDROFURANS AND TETRAHYDROPYRANS VIA ADDITION OF RADICALS TO UNSATURATED SULFIMIDES, Tetrahedron letters, 37(6), 1996, pp. 909-912
The addition of tetrahydrofuranyl or tetrahydropyranyl radicals to (E)
-styryl sulfimide derivatives furnishes the corresponding (E)-styryl t
etrahydrofurans or tetrahydropyrans respectively. The corresponding ra
dical reactions with (Z)-styryl sulfimides gives rise to a mixture of
(E) and (Z) isomers, this is in contrast to the Et(3)B mediated reacti
on, which is stereoselective.