By careful exclusion of oxygen, carbon radicals, generated from the W lamp photolysis of O-acyl derivatives of N-hydroxy-2-thiopyridone, can be added efficiently to methylvinyl ketone. Extension to the radical from pent-4-enoic acid provides another synthesis of cyclopentane derivatives. Analogous additions with other electrophilic olefins are also reported.
通过仔细地排除氧,可以将由N-羟基-2-
硫代
吡啶酮的O-酰基衍
生物的W灯光解所产生的碳自由基有效地添加到甲基
乙烯基酮中。由戊-4-烯酸延伸至自由基提供了
环戊烷衍
生物的另一种合成方法。还报道了与其他亲电子烯烃的类似添加。