Polymeric trisphenylphosphine ruthenium trichloride, its preparation method and application in catalytic preparation of 2,2'-dipyridyl

CN117024756BActive Publication Date: 2026-07-07JIANGSU NOON CROP SCI CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU NOON CROP SCI CO LTD
Filing Date
2023-08-08
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

In existing technologies, nickel-based catalysts for the dehydrogenation coupling of pyridine to prepare 2,2'-bipyridine have low single-pass conversion rates, and noble metal catalysts have extremely high reaction temperatures, resulting in high energy consumption and complex processes.

Method used

A polymeric triphenylphosphine trichloride catalyst was prepared by polymerization of triphenylphosphine trichloride, benzene, and dimethyl formaldehyde. The catalyst was used for the dehydrogenation coupling reaction of pyridine. The optimized reaction conditions were 100-180℃ and 0.1-2.0MPa to improve the catalytic efficiency.

Benefits of technology

A high yield of 2,2'-bipyridine, reaching 92%, was achieved under mild conditions, reducing energy consumption and equipment requirements, and simplifying the difficulty and cost of subsequent processing.

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Abstract

The present application relates to polymeric triphenylphosphine ruthenium trichloride and its preparation method and application in catalytic preparation of 2,2'-dipyridyl, and belongs to the technical field of fine chemical industry. The polymeric triphenylphosphine ruthenium trichloride obtained by copolymerization of triphenylphosphine ruthenium trichloride-benzene-dimethylol formaldehyde is used as a catalyst to catalyze the pyridine dehydrogenation coupling reaction in a fixed bed reactor at 100-180 DEG C and 0.1-2.0 MPa pressure, and 2,2'-dipyridyl can be prepared at a highest yield of 92%. Compared with the existing method for preparing 2,2'-dipyridyl, the present application provides a method for preparing 2,2'-dipyridyl at a high yield under mild reaction conditions.
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Citation Information

Patent Citations

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  • CN108440392B