two contiguous stereocentres. Low diastereoselectivity is typically observed from commonly used α-diazocarboxylic ester precursors. High diastereoselectivity was previously revealed in a gold-catalyzed multicomponent route into allyl sulfonium ylides by reaction of ynamide, oxidant and allyl sulfides. The effect of substrate modifications on the diastereoselectivity have been studied, with N-phenyl
带有取代的烯丙基的的[2,3]-σ重排产生两个连续的立体中心。通常从常用的α-重氮
羧酸酯前体中观察到低的非对映选择性。先前通过
金催化的多组分途径,通过乙酰胺,氧化剂和烯丙基
硫的反应,揭示出高非对映选择性,形成烯丙基sulf的烷基化物。已经研究了底物修饰对非对映选择性的影响,其中N-苯基甲磺酰胺衍生的酰胺被证明是最有效的。该报告包括改进的实验程序,并论证了
金催化的过程在-78°C下仍然非常有效。