The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2020
Filed:
Nov. 25, 2019
Applicant:
Max (Rudong) Chemicals Co., Ltd., Nantong, Jiangsu, CN;
Inventors:
Baochuan Guan, Zhejiang, CN;
Tianhao Zhang, Zhejiang, CN;
Qiuju Sheng, Zhejiang, CN;
Bangchi Chen, Zhejiang, CN;
Assignee:
MAX (RUDONG) CHEMICALS CO., LTD., Nantong, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D 401/04 (2006.01);
U.S. Cl.
CPC ...
C07D 401/04 (2013.01);
Abstract
Disclosed herein is a method of preparing N-acyl anthranilamide (I), including: reacting a substituted anthranilic acid (II) with pyrazolecarboxylic acid (III) under the action of a phosphorus reagent and a base to obtain an intermediate benzoxazinone (IV); and subjecting the intermediate benzoxazinone (IV) and a protonic acid salt of methylamine to a ring-opening reaction to obtain N-acyl anthranilamide (I), as shown in the following reaction scheme: