Pyrrolidinones and a process to prepare them
This application is directed to a compound of Formula II Also disclosed is a process for preparing a compound of Formula II comprising using the compounds of Formulae IV and V Also disclosed is a method for preparing a compound of Formula I comprising contacting a compound of Formula II with a compound of a compound of Formula VI wherein A1, A2 A3, R1, R2, R3a, R3b, R4, B1, B2 and B3, are as defined in the disclosure.
FMC Corporation
C C C A A C
C07D C07D C07C A01N A01N C07D
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Rafael Yuzhong
Shapiro Chen