Reilly Industries, Inc.

Z Jason Yang

Phillip B Lawin

L Mark Huckstep

Michael P Cruskie, Jr

Gregory F Hillstrom

Described are preferred processes for preparing 3,5-dichloropyridines by dechlorinating higher-chlorinated pyridine compounds such as 2,3,5,6-tetrachloropyridine in an acidic medium in the presence of zinc and optionally a quaternary ammonium catalyst.

Dechlorination of pyridines in acidic, zinc-containing mediums

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.

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Florence, SC, United States of America

Z Jason Yang