Processes for dechlorinating pyridines

Details Processes for dechlorinating pyridines Processes for dechlorinating pyridines

1999-03-12

2000-04-18

Owens, Amelia

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546348, C07D21361, C07D21306

Patent

active

06051714&

ABSTRACT:
Described are preferred processes for dechlorinating chlorinated pyridine compounds in the presence of zinc, an alkaline reagent and a phase transfer catalyst. Particularly preferred processes provide advantageous synthetic routes to 2,3,5-trichloropyridine starting with 2,3,5,6-tetrachloropyridine.

REFERENCES:
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patent: 4111938 (1978-09-01), Redemann
patent: 4127575 (1978-11-01), McGregor
patent: 4258194 (1981-03-01), Weis et al.
patent: 4287347 (1981-09-01), Fah et al.
patent: 4563531 (1986-01-01), Marinak et al.
patent: 5591857 (1997-01-01), Friis et al.

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