CN Patent

CN111153862B — 一种雷西纳德的精制方法

Assigned to Beijing Xin Kai Yuan Pharmaceutical Technology Co ltd Hainan Branch · Expires 2021-07-06 · 5y expired

What this patent protects

本发明涉及一种雷西纳德的精制方法，包括以下步骤：将雷西纳德粗品加入到加热至沸的溶剂中，加热至溶解，加入活性炭，过滤，滴加正己烷，缓慢降温至35～45℃析晶1～2h，再缓慢降温至0～10℃析晶2～3h，过滤，减压干燥，得到高纯度的成品。与现有方法相比，本发明所述方法精制效果好，精制过程所用到的溶剂较普通，工业化操作简单，精制目标产物收率和纯度高，适合工业化大生产。

USPTO Abstract

本发明涉及一种雷西纳德的精制方法，包括以下步骤：将雷西纳德粗品加入到加热至沸的溶剂中，加热至溶解，加入活性炭，过滤，滴加正己烷，缓慢降温至35～45℃析晶1～2h，再缓慢降温至0～10℃析晶2～3h，过滤，减压干燥，得到高纯度的成品。与现有方法相比，本发明所述方法精制效果好，精制过程所用到的溶剂较普通，工业化操作简单，精制目标产物收率和纯度高，适合工业化大生产。

Drugs covered by this patent

Patent Metadata

Patent number
CN111153862B
Jurisdiction
CN
Classification
—
Expires
2021-07-06
Drug substance claim
No
Drug product claim
No
Assignee
Beijing Xin Kai Yuan Pharmaceutical Technology Co ltd Hainan Branch
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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