Certain aromatization process for preparing 1-alkyl-1,4-dihydro-

Details Certain aromatization process for preparing 1-alkyl-1,4-dihydro- Certain aromatization process for preparing 1-alkyl-1,4-dihydro-

1986-08-25

1988-02-23

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546329, 546346, 546348, C07D21556, C07D21326

Patent

active

047271485

ABSTRACT:
A 4-cyclohexenylpyridine is brominatively aromatized to the corresponding 4-phenylpyridine by brominating the cyclohexenylpyridine, such as a 4-(halocyclohexenyl)pyridine, especially a 4-(4-halocyclohex-3-enyl)pyridine hydrochloride, and heating the brominated product in the presence or absence of any added base or hydrogen acceptor to form, e.g., a 4-(halophenyl)pyridine. The invention is of particular utility in the manufacture of intermediates of antibacterial 1-alkyl-1,4-dihydro-4-oxo-7-(4-pyridyl)-3-quinolinearcarboxylic acids.

REFERENCES:
patent: 3907808 (1975-09-01), Lesher et al.
patent: 4118557 (1978-12-01), Lesher
patent: 4405792 (1983-09-01), Walter
patent: 4550167 (1985-10-01), Ramachandran
patent: 4552964 (1985-11-01), Ramachandran
patent: 4554352 (1985-11-01), Ranken

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