The presence of catalytic amounts of CeCl(3) improves yields and simplifies procedure in the Reformatsky reactions of ethyl bromofluoroacetate with aldehydes and ketones to generate diastereomeric mixtures of alpha-fluoro-beta-hydroxy esters, some of which can be separated by crystallization or column flash chromatography. Diastereomerically pure alpha-fluoro-beta-hydroxy acids are obtained by mild
催化量的CeCl(3)的存在提高了产率,并简化了
溴氟乙酸乙酯与醛和酮的Reformatsky反应中生成α-
氟-β-羟基酯的非对映体混合物的步骤,其中一些可通过结晶或色谱分离快速色谱。非对映体纯的α-
氟-β-羟基酸是通过轻度碱解所分解的α-
氟-β-羟基酯而获得的。还提供了新的α-
氟-β-羟基酯和α-
氟-β-羟基酸的详细NMR数据。