Method for preparing 2,2′-dipyridine and derivatives thereof

US11014886B2 · kind B2 · utility

Assignee

• NANJING REDSUN BIOCHEMISTRY CO., LTD · CN

Inventors

• Chaoran Luo · Nanjing, CN
• Wenkui WANG · 安丰镇, CN
• Yi Sheng Xue · Nanjing, CN
• Xinchun Chen · Xi'an, CN
• Dianhai Zhou · 安丰镇, CN
• Jianhua Jiang · 林湖乡, CN
• Fujun Wang · 安丰镇, CN

Key dates

• Filing date: Apr 4, 2018
• Grant date: May 25, 2021
• Expiry date: Apr 4, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/61
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a method for preparing 2,2′-dipyridine and derivatives thereof. The method includes: using pyridine represented by formula I or a derivative thereof as a raw material to generate 2,2′-dipyridine represented by formula II by performing dehydrogenative coupling under the action of a supported catalyst in the presence of additives, where R is H, C1-C2 alkyl, Cl, or Br. The method of the present invention features wide adaptability to raw materials, high atomic utilization rate, high catalyst activity, long service life, and fewer by-products.