1,8-bis(Schiff base)-p-menthane derivatives as well as preparation method and applications thereof

US10674723B2 · kind B2 · utility

Assignee

• INSTITUTE OF CHEMICAL INDUSTRY OF FOREST PRODUCTS, CAF · CN

Inventors

• Zhendong Zhao · Nanjing, CN
• Shichao XU · Nanjing, CN
• Shouji Zhu · Nanjing, CN
• Jing Wang · Beijing, CN
• Liangwu Bi · Nanjing, CN
• Yuxiang Chen · 安丰镇, CN
• Yanju Lu · Nanjing, CN
• Yan Gu · Singapore, SG

Key dates

• Filing date: Oct 26, 2017
• Grant date: Jun 9, 2020
• Expiry date: Nov 28, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention discloses a type of 1,8-bis(Schiff base)-p-menthane derivatives as well as their preparation method and applications. The reaction of 1,8-diamino-p-menthane with a substituted benzaldehyde was carried out in a polar organic solvent at 0° C.-75° C. for 1-48 h. After the completion of the reaction, part of the solvent was distilled off to perform recrystallization to get a 1,8-bis(Schiff base)-p-menthane derivative, whose pre-emergence herbicidal activity against ryegrass was determined by using the Petri dish seed germination method. The 1,8-bis(Schiff base)-p-menthane derivatives, obtained with this method in high yield and mild reaction conditions, have a good inhibitory effect on the growth of annual ryegrass, and low toxicity.