The acyl derivatives of 1 with the acyl group linked to aryl, vinyl etc. give on photolysis carboxy radicals. These radicals, by attack on the thiopyridone function, afford thio-peresters which are the real precursors of the anhydrides observed before. The benzoyloxy radical from 2 can be trapped by ethylvinyl ether to give adduct 14 in promising yield.
具有与芳基,
乙烯基等连接的酰基的1的酰基衍
生物在光解中产生羧基。这些自由基通过攻击
硫代
吡啶酮官能团而得到
硫代-过酸酯,其是之前观察到的酸酐的真正前体。来自2的苯甲酰氧基可被乙基
乙烯基醚捕获,以有希望的产率得到加合物14。