Site-Selective Intramolecular Photocycloaddition of 2-Alkenyl-Substituted 1-Cyanonaphthalenes Depending on Additives, Solvents, and Substituents
作者:Kazuhiko Mizuno、Yasuharu Yoshimi、Shin-ichi Konishi、Hajime Maeda
DOI:10.1055/s-2001-15068
日期:——
Irradiation of 2,3-dimethylbut-2-enyl 1-cyano-2-naphthylmethyl ether in the presence of Eu(hfc)3 in benzene site-selectively afforded the (2Ï + 2Ï) intramolecular photocycloadduct at the 1,2-position on the naphthalene ring. On the other hand, allyl 1-cyano-2-naphthylmethyl ether in the presence of Mg(ClO4)2 in acetonitrile gave the photocycloadduct at the 3,4-position as a sole product.
在苯中,2,3-二甲基-2-丁烯基1-氰基-2-萘甲基醚在Eu(hfc)3的存在下,择位选择性地生成了萘环1,2-位的(2π + 2π)分子内光环加成产物。另一方面,丙烯基1-氰基-2-萘甲基醚在醋腈中加入Mg(ClO4)2,仅生成3,4-位的光环加成产物。