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改进了D-(-)-扁桃酸拆分DL-半胱氨酸盐酸盐制备D-半胱氨酸盐酸盐的方法。DL-半胱氨酸盐酸盐与D-(-)-扁桃酸在水中成盐后,得到的非对映体盐,纯化后经盐酸分解、10%的乙醇-丙酮溶液重结晶后得到目标产物,拆分收率25·6%。
A method for preparing D-cysteine hydrochloride by D - (-) - mandelic acid resolution of DL-cysteine hydrochloride is improved. The resulting diastereomeric salt of DL-cysteine hydrochloride and D - (-) - mandelic acid after salt formation in water was purified by hydrochloric acid and the target was obtained after recrystallization from a 10% ethanol-acetone solution Product, split yield 25.6%.