Trithiazyl trichloride 1 converts 2,5-disubstituted furans into
isothiazoles (e.g. 3, 6, 7) regiospecifically and in good yield,
providing a new, one-step synthesis of isothiazoles, for which a novel
mechanism involving formation and ring-opening of a β-thiazylfuran 4
is proposed.
三
噻唑三
氯化物 1 可将 2,5 二甲基
呋喃转化为
异噻唑(如 3、6、7),且具有区域特异性和良好的收率,为
异噻唑的一步法合成提供了一种新方法。