Palladium-catalyzed dehydrosulfurative Liebeskind–Srogl coupling of terminal alkynes with 2-mercapto-1,3-pyrimidine-5-carbaldehyde under base-free conditions provides 2-(alkynyl)-1,3-pyrimidine-5-carbaldehydes, which are substrates for autocatalytic amplification of chirality according to Soai et al. The mercapto aldehyde acceptor is obtained by condensation of Arnold’s vinamidinium salt with thiourea
在无碱条件下,
钯催化的末端
炔烃与2-巯基-1,3-
嘧啶-5-
甲醛的
钯催化脱氢
硫化Liebeskind-Srogl偶联可提供2-(炔基)-1,3-
嘧啶-5-
甲醛根据Soai等人的方法,用于手性的自动催化扩增。巯基醛受体是通过将阿诺德的
钒胺盐与
硫脲缩合而获得的。