= 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。