An environmentally benign and efficient method has been successfully developed to generate S-(2H-chromen-4-yl) phosphorothioates from easily available 2-(3-hydroxyprop-1-ynyl)phenols and O,O-diethyl phosphorothioic acid [(EtO)₂P(O)SH] with water as the only byproduct. The reaction proceeds smoothly in moderate to excellent yields. It is noted that (EtO)₂P(O)SH acts not only as an acid promoter, but also as the nucleophile to attack the allenic carbocation intermediate.

中文翻译：

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炔丙醇和O，O-二乙基硫代磷酸直接转化为S-（2H-Chromen-4-yl）硫代磷酸酯

环境友好和有效的方法已被成功地开发，以产生小号- （2- ħ -苯并吡喃-4-基）从容易获得的硫代磷酸酯2-（3-羟基丙-1-炔基）苯酚和ø，ö -二乙基硫代磷酸[（ EtO）₂ P（O）SH]，唯一的副产物是水。反应平稳进行，产率中等至优异。注意，（EtO）₂ P（O）SH不仅起酸促进剂的作用，而且还作为亲核试剂攻击烯丙基碳正离子中间体。