Process for producing 2:2'- or 4:4'-bipyridyls

Details Process for producing 2:2'- or 4:4'-bipyridyls Process for producing 2:2'- or 4:4'-bipyridyls

1975-05-02

1976-06-08

Rotman, Alan L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D21302

Patent

active

039622681

ABSTRACT:
A process for the manufacture of 2:2'- or 4:4'-bipyridyls which comprises heating a 2- or 4-(halo-magnesium)-pyridine respectively with a halogen or the halide of an element from groups 4b, 5b, 6b, 7b, 8, lb, 2b, 3a, 4a and 5a of the Periodic table. Typically the process involves heating grignard reagents from 2- or 4-bromo pyridine with bromine or silver copper or cobalt chlorides or bromides at 40.degree. to 130.degree.C.
Bipyridyls are useful as intermediates for herbicide manufacture.

REFERENCES:
patent: 3882133 (1975-05-01), Dalton
Klingsberg, Pyridine and its Derivatives, Part 2, p. 437, Interscience Pub., (1961).

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