Photolabile Protection of Alcohols, Phenols, and Carboxylic Acids with 3-Hydroxy-2-Naphthalenemethanol
作者:Anton Kulikov、Selvanathan Arumugam、Vladimir V. Popik
DOI:10.1021/jo801302m
日期:2008.10.3
= 0.17-0.26) and chemical (>90%) yields. The initial byproduct of the photoreaction, 2-naphthoquinone-3-methide, reacts rapidly with water (k(H2O) = 144 +/- 11 s(-1)) to produce parent 3-hydroxy-2-naphthalenemethanol. The o-quinone methide intermediate can be also trapped by other nucleophiles or converted into a photostable Diels-Alder adduct with ethyl vinyl ether.
用(3-羟基-2-萘基)甲基辐照“笼中”的醇,酚和羧酸可导致底物快速(k(释放)大约= 10(5)s(-1))释放,良好的量子(Phi = 0.17-0.26)和化学(> 90%)产率。光反应的初始副产物2-萘醌-3-甲基化物与水快速反应(k(H2O)= 144 +/- 11 s(-1)),生成母体3-羟基-2-萘甲醇。邻醌甲基化物中间体也可被其他亲核试剂捕获或与乙基乙烯基醚转化为光稳定的Diels-Alder加合物。