The optically active 3-cyclohexene-1-carboxylic acid was synthesized through a TiCl4-catalyzed diastereoselective Diels–Alder reaction utilizing lactic acid ester as a chiral auxiliary, which can be removed by washing with H2O. The (S)- and (R)-isomers were both derived from easily available ethyl l-lactate.
使用
乳酸酯作为手性助剂,通过 TiCl 4催化的非对映选择性 Diels-Alder 反应合成光学活性的 3-
环己烯-1-
羧酸,可以通过 H 2 O洗涤去除。 ( R )-异构体均衍生自容易获得的L-
乳酸乙酯。