公开(公告)号：WO2022254395A1

公开(公告)日：2022-12-08

申请号：PCT/IB2022/055195

申请日：2022-06-03

Applicant: PI INDUSTRIES LTD.

Inventor： YADAV, Ajay ,  MAHAPATRA, Tridib ,  PABBA, Jagadish ,  PATRA, Pranab Kumar ,  SHINDE, Bharat Uttamrao ,  KALWAGHE, Amol D. ,  SHAH, Jigarkumar Harikishandas ,  KANAWADE, Shrikant Bhausaheb ,  SHARMA, Raju ,  GURJAR, Bhagwan Lal ,  KLAUSENER, Alexander G.M.

IPC: C07D409/14 ,  A01N43/56

Abstract: The present invention relates a novel process for preparing compounds of formula (I) or salts or N-oxides thereof, Formula (I) wherein, Ra, Rb, R1, R2, R3, R4 and n are as defined in the description. The process for preparing a compound of formula (I) comprises step of: reacting a compound of formula (IV) with substituted anthranilic acid of formula (III) and suitable amine of formula (RaRbNH) or with substituted anthranilic amide of formula (IIIa), optionally isolating compound of formula (II). Further, the present invention also describes the preparation of compound of formula (IV) which is obtained from compound of formula (VIII).