Process for producing 2-(phenyl methyl thio)-3-pyridine...

Details Process for producing 2-(phenyl methyl thio)-3-pyridine... Process for producing 2-(phenyl methyl thio)-3-pyridine...

2004-06-17

2010-06-29

Davis, Zinna N (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C546S327000

Reexamination Certificate

active

07745631

ABSTRACT:
The invention discloses an improved process for producing an intermediate to produce large quantity of 2-(Phenyl methyl thio)-3-pyridine carboxylic acid. The process comprises reacting 2-chloro-3-cyanopyridine with benzyl mercaptan in presence of a base and an aprotic solvent. The resulting intermediate 2-(phenyl methyl thio)-3-cyanopyridine is hydrolyzed in presence of a base in an autoclave and isolated under acidic condition to get the desired product.

REFERENCES:
patent: 4767766 (1988-08-01), Baker et al.
patent: 547035 (1987-03-01), None
patent: 547305 (1987-03-01), None
International Search Report of International Application No. PCT/IN2004/000173, 2004.
Written Opinion of International Application No. PCT/IN2004/000173, 2004.

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