Process for preparing-1-ethyl-5-hydroxypyrazole

Details Process for preparing-1-ethyl-5-hydroxypyrazole Process for preparing-1-ethyl-5-hydroxypyrazole

1997-10-15

1998-09-15

Ramsuer, Robert W.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23120

Patent

active

058080929

ABSTRACT:
Disclosed is a process for preparing 1-ethyl-5-hydroxy-pyrazole, which comprises reacting an alkyl 3-alkoxy-acrylate represented by the following formula (1): ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and each represent a lower alkyl group, and in the formula represents either cis- or trans-configuration, with ethylhydrazine in an amount of 1- to 10-fold mole based on 1 mole of the alkyl 3-alkoxyacrylate in a weakly basic aqueous solvent.

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