Alkylation of pyrazoles with alcohols over zeolites

HY zeolite is a highly active catalyst for the vapor-phase N-alkylation of pyrazoles with alcohols. For example, the reactions of pyrazole and 4-methylpyrazole with methanol over HY afford N-methylpyrazole and 1,4-dimethylpyrazole, respectively, in a 100% yield at 573 K. This revised version was published online in July 2006 with corrections to the Cover Date.