The invention relates to a method for the production of L-carnitine, wherein a chiral β-lactone carnitine precursor is obtained by a [2+2] cycloaddition of ketene with an aldehyde X—CH
2
—CHO, wherein X is selected from Cl, Br, I and trimethylamine, in the presence of a chiral catalyst.
这项发明涉及一种生产
左旋肉碱的方法,其中通过醛X—
CH2—CHO与酮烯进行[2+2]环加成反应,在手性催化剂的存在下获得手性β-内酯肉碱前体,其中X选自Cl、Br、I和
三甲胺。