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:
Jun. 14, 2022
Filed:
Jan. 31, 2021
Soochow University, Suzhou, CN;
Fan Xu, Suzhou, CN;
Dandan Li, Suzhou, CN;
Xiaoyou Ding, Suzhou, CN;
Yanan Zhu, Suzhou, CN;
Zhigang Yao, Suzhou, CN;
SOOCHOW UNIVERSITY, Suzhou, CN;
Abstract
The present invention discloses a method for preparing a cyclopenta[c]chromene compound. A cationic rare earth compound [Ln(CH)CN)][(AlCl)].CHCN is used as a catalyst, and p-methyl thiophenol is used as an accelerator for a catalytic reaction of a chalcone compound so as to prepare a product; and Ln, contained in the catalyst, represents a positive trivalent rare earth metal ion and is selected from one of La, Nd, Sm, Gd and Yb. According to the method, the starting materials are easy to obtain, the reaction process is simple, the catalyst usage is low, the catalyst is universally applicable to various substituted 2-hydroxy chalcones, and the obtained cyclopenta[c]chromene compound has not been reported. The catalyst synthesis method is simple and easy to obtain, and the yield of the target product is high.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile