Irradiation of aromatic carbonylcompounds and allyl-, 2-methyl-2-propenyl-, or 3-methyl-2-butenyltrimethylstannanes in acetonitrile afforded δ,γ-unsaturated alcohols as major product. A photoinduced electron transfer mechanism is proposed for the allylations.
hydrogen abstraction reactionsbetween benzophenones and allylic silanes have been investigated. The high regioselective oxetane formations were explained in terms of an additional stability due to the σSi–C–pπ hyperconjugation of β-silyl radicals in diradical intermediates. Allylradical substituted by a trimethylsilyl group, which was generated from a hydrogen abstraction reaction, recombined with benzophenone