Competition between intramolecular [2+2] photocycloaddition and hydrogen-abstraction reactions from 2-carboxamidocyclopent-2-enones
作者:Catherine Meyer、Olivier Piva、Jean-Pierre Pete
DOI:10.1016/0040-4039(96)01268-3
日期:1996.8
Hydrogen-abstraction and intramolecular [2+2] cycloaddition are competitive processes during the photolysis of N-alkyl-N-allyl-2-carboxamidocyclopent-2-enones. Depending on the nature of the N-alkyl substituents and the conformations available in the starting enones, products involving hydrogen abstraction by the alpha- or beta- carbon atoms of the excited enone are observed beside the expected cycloadducts. When methyl and allyl groups are present on the nitrogen, hydrogen abstraction occurs from the methyl rather than from the allyl substituent. Copyright (C) 1996 Published by Elsevier Science Ltd