Hiroshi Hongo, Kazuto Iwasa, Chizuko Kabuto, Hisao Matsuzaki and Hiroto Nakano
Optically active photopyridones possessing synthetic versatility are obtained conveniently by lipase-catalysed enantioselective acylation or hydrolysis of racemic photopyridones, and the absolute configurations are determined by chemical correlation, X-ray crystallographic and CD spectral analyses.