US 11,535,628 B2Granted

Method for preparation of Asenapine

AssigneeZhejiang Ausun Pharmaceutical Co., Ltd.

InventorZhiguo Zheng

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Abstract

The present invention relates to a method for preparing Asenapine. In particular, the present invention relates to a method for preparing pharmaceutically acceptable Asenapine free base and new crystal form thereof, and also relates to methods for preparing the intermediate compounds used in said method.

Claims9

Dependent claims

A compound of formula II:

wherein X is F, Cl, Br or I.

Dependencies are inferred from the claim text.

Facts

Application: 16/992,961Filed 13 Aug 2020
Priority: CN 201910744003.913 Aug 2019
Published: US 2021/0047339 A118 Feb 2021
Granted: 27 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C07D 491/044
Ortho-condensed systems: with only one oxygen atom as ring hetero atom in the oxygen-containing ring
C07B 2200/13
Indexing scheme relating to specific properties of organic compounds: crystalline forms, e.g. polymorphs
C07D
Heterocyclic compounds
C07B
General methods of organic chemistry

Family

US 2021/0047339 A1Pre-grant publication · published 18 Feb 2021
US 11,535,628 B2This patent

From the US filing history. Foreign family members aren’t listed.

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