Process for preparing 1-methylindazole-3-carboxylic acid

Details Process for preparing 1-methylindazole-3-carboxylic acid Process for preparing 1-methylindazole-3-carboxylic acid

2006-06-13

2006-06-13

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07060841

ABSTRACT:
The invention provides a process for preparing 1-methylindazole-3-carboxylic acid of formula (I):which comprises reacting a methylating agent with indazole-3-carboxylic acid of formula (VI):in the presence of an alkaline earth metal oxide or alkoxide in an appropriate solvent. Also provided is a process for producing Granisetron, using the method of the present invention for producing 1-methylindazole-3-carboxylic acid.

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