CN Patent

CN115403528B — 无定形3,4-二氢喹唑啉衍生物的制备方法

Assigned to Nanjing Chia Tai Tianqing Pharmaceutical Co Ltd · Expires 2025-01-07 · 1y expired

What this patent protects

本发明涉及无定形3,4‑二氢喹唑啉衍生物的制备方法，该方法制备的无定形式I化合物没有检测到酯化的副产物，所得固态产品粒径分布的d 90 不超过10μm，XRPD表征显示在检测限内没有可检测的结晶含量/信号，符合制剂要求，同时该制备工艺操作简便、安全环保、容易实现工业化大生产。

USPTO Abstract

本发明涉及无定形3,4‑二氢喹唑啉衍生物的制备方法，该方法制备的无定形式I化合物没有检测到酯化的副产物，所得固态产品粒径分布的d 90 不超过10μm，XRPD表征显示在检测限内没有可检测的结晶含量/信号，符合制剂要求，同时该制备工艺操作简便、安全环保、容易实现工业化大生产。

Drugs covered by this patent

Patent Metadata

Patent number
CN115403528B
Jurisdiction
CN
Classification
—
Expires
2025-01-07
Drug substance claim
No
Drug product claim
No
Assignee
Nanjing Chia Tai Tianqing Pharmaceutical Co Ltd
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.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.