Patent ID: 8969553
Filing Date: 2015-03-03
Classification: A01N,C07D

Abstract:
1. A process for preparing an N-sulfonyl-substituted oxindole of formula (3) which comprises a 6-ring heteroaryl substituent (Q) in the 3 position, in which R (C (C (C (C (C (C R (C (C R hydrogen or (C (C and Q is a six-membered heteroaromatic ring comprising from 1 to 3 nitrogen atoms, where the heteroaromatic ring is unsubstituted or is substituted by at least one substituent selected from the group consisting of (C said process comprising reacting of an oxindole compound of formula in which R in which R X, as leaving group, is where said reaction is carried out in the presence of an imidazole base substituted in the 1 position, or a base mixture which comprises at least one imidazole base substituted in the 1 position.