L-carnitine was synthesized from the chiral epichlorohydrin. Its index of quality was improved through recrystallizing the intermediate and accorded with USP(24).

• 探讨了以手性环氧氯丙烷为原料，对中间体进行重结晶提高光学纯度的方法合成了L-(－)-肉?A，其质量指标符合美国药典USP(24)版的要求。