Nanjing Redsun Biochemistry Co., Ltd

Dianhai Zhou

Jianhua Jiang

Yi Xue

Chaoran Luo

Wenkui Wang

Xinchun Chen

Fujun Wang

Ruikuan Yue

Honglong Chen

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&#x2032;-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, C-Calkyl, 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.

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

A method for preparing 1,1'-ethylene-2,2&#x2032;-bipyridinium dichloride includes mixing an aqueous diquat dibromide solution with hydrochloric acid, adding dropwise to a mixture of an organic solvent, a bromine absorbent, and an oxidant, and reacting to produce 1,1&#x2032;-ethylene-2,2&#x2032;-bipyridinium dichloride.

Method for preparing 1,1'-ethylene-2,2&#x2032;-bipyridinium dichloride

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Jiangsu, China

Dianhai Zhou