Di- or trisubstituted alkenes of defined geometry, with terminal enamide groups, are formed in an atom-economic three-carbon chain extension of alkynes with allyl amides catalyzed by ruthenium (see, for example, Equation (1); Boc=tert-butoxycarbonyl, TMS=trimethylsilyl).
带有末端烯酰胺基团的,具有限定几何形状的二或三取代烯烃是在
炔烃与
钌催化的烯丙基酰胺的原子经济的三碳扩链反应中形成的(例如,参见式(1); Boc =叔丁氧羰基) ,TMS =三甲基甲
硅烷基)。