Synthesis of alkenyl sulphoxides by intramolecular and intermolecular addition of sulphenic acids to alkynes
作者:Richard Bell、Peter D. Cottam、John Davies、D. Neville Jones
DOI:10.1039/p19810002106
日期:——
mixture of dioctenyl sulphoxides by way of alkenesulphenic acid–dialkyl sulphine interconversions. Benzenesulphenic acid, methanesulphenic acid, and ethoxycarbonylmethanesulphenic acid, conveniently generated by thermolysis of 1-cyano-2-alkyl(or aryl)sulphinylethanes, underwent intermolecular addition to unactivated and activated alkynes regioselectively to give alkenyl sulphoxides in good yields.
通过在140℃下热解ω-(叔丁基亚磺酰基)炔烃形成的炔基-ω-亚磺酸,在区域特异性地环化成2-亚甲基硫代环烷烃1-氧化物;以此方式未形成2-亚甲基噻吨-1-氧化物。通过加热二叔丁基亚砜而获得的2-甲基丙烷-2-磺酸,被区域选择性地加入到辛基-1-炔中,主要生成2-叔丁基亚磺酰基辛基-1-烯,后者本身会热分解为二辛烯基亚砜的混合物。通过链烷磺酸-二烷基硫的相互转化。通过1-氰基-2-烷基(或芳基)亚磺酰基乙烷的热分解可方便地生成苯甲磺酸,甲磺酸和乙氧基羰基甲磺酸,将它们在分子间加成至选择性地生成未活化和活化的炔烃中,从而以良好的产率得到链烯基亚砜。