The conjugate addition reaction of BHA alkenoates with butyl- and phenyllithiums in toluene at -78°C were catalyzed by a substoichiometric amount of chiral ligands 1 and 2 to give the corresponding 3-substituted alkanoates in good to modest ees.
在亚几何量的手性
配体 1 和 2 的催化下,
BHA 烯酸盐与丁基
锂和
苯基锂在-78°C 的
甲苯中发生共轭加成反应,得到相应的 3-取代的烷酸盐,反应物的质量从良好到中等。