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发明公开
CN106928110A 一种高光学纯度D‑或L‑硒代蛋氨酸的制备方法 无效 - 驳回

一种高光学纯度D‑或L‑硒代蛋氨酸的制备方法
摘要：
本发明公开了一种高光学纯度D‑或L‑硒代蛋氨酸的制备方法，以D‑或L‑蛋氨酸为初始原料，硫酸二乙酯或卤代烷基酸或其衍生酯作为烷基化试剂，生成的硫鎓盐，在酸性条件下脱硫、关环生成α‑氨基‑γ‑丁内酯卤酸盐，α‑氨基‑γ‑丁内酯卤酸盐与甲基硒醇盐加成开环，有机酸酸化，重结晶后获得D‑或L‑硒代蛋氨酸。得到的产品化学纯度>99%，且高光学纯度普遍ee> 99%。本发明原料廉价易得，步骤简单易操作，反应条件简单，适合规模化生产。
摘要（英）：

The invention discloses a preparation method of high-optical-purity D- or L-selenomethionine. The preparation method comprises the following steps: by taking D- or L-methionine as initial raw materials and diethyl sulfate or halogenated alkyl acid or derived esters as alkylation reagents, generating sulfonium salt, desulfurizing and closing ring under acidic conditions, to produce alpha-amino-gama-butyrolactone halate, having addition reaction to alpha-amino-gama-butyrolactone halate with methyl selenol salt and opening ring, acidifying with organic acid, and recrystallizing to obtain D- or L-selenomethionine. The chemical purity of the product is more than or equal to 99%, and the high optical purity is more than or equal to 99%. The preparation method is low-cost and easily available in raw materials, simple in steps and easy to operate, simple in reaction conditions, and suitable for large-scale production.

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