Catalytic production of pyridines from alkynes and nitriles

US4006149A · kind A · utility

Assignee

• Studiengesellschaft Kohle gGmbH · DE

Inventors

• Helmut Bonnemann · Neheim, DE
• Hartmut Schenkluhn

Key dates

• Filing date: Apr 2, 1975
• Grant date: Feb 1, 1977
• Expiry date: Apr 2, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2231/328
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the production of pyridines by the reaction of alkynes and nitriles in the presence of a cobalt-containing catalyst, special catalysts have been found to give high yields. The catalyst can be a cobalt-(I) complex compound of the type cyclooctenyl-cobalt(I)-cyclooctadiene, methyl heptadienyl-cobalt(I)-butadiene and cyclopentadienyl-cobalt(I)-cyclooctadiene, or it can be formed in situ by reducing a di- or tri-valent cobalt salt with zinc, cadmium, a metal of the main groups I to III of the Periodic Table or with an organometallic compound of any of the foregoing.