A Process For The Preparation Of Pyrazolopyridine Diamides Of Formula (I) And Intermediates Thereof

Abstract: The present invention provides a process for the preparation of bicyclic anthranilic diamides of formula (I) or of salts thereof, wherein, R1, R2, Ra, Rb and R3 are as described in the description. More particularly, the present invention relates to a process for preparing bicyclic anthranilic diamides of formula (I), comprising the step of preparing a substituted 2-(5-(2-cyanoprop-1-en-1-yl)-1H-pyrazol-1-yl)acetate of formula (VII) or of salts thereof by reacting a substituted 2-(5-formyl-1H-pyrazol-1-yl)acetate of formula (VIII) or of salts thereof with a substituted (1-cyanoethyl)phosphonate of formula (IX) or of salts thereof. The invention further relates to a process for preparing intermediate compounds of formula (Z) or of salts thereof, which are useful in the preparation of compound of formula (I) or of salts thereof.

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