elaborated for the synthesis of 3-unsubstituted oxindole-1-carboxamides starting from the easily available 1,3-bis(phenoxycarbonyl)oxindoles. Selective amidation of the N-phenoxycarbonyl moiety and subsequent removal of the C(3)-phenoxycarbonyl moiety furnished the title compounds, which are useful building blocks for further functionalization. Besides the novel methodologies, several new representatives
Two protocols have been developed for the synthesis of 1,3-di[alkoxy(aryloxy)carbonyl]-2-oxo-2,3-dihydroindoles starting from the corresponding N,O-diacyl derivatives obtained by treatment of 2-oxindoles with chloroformic acid esters and, triethylamine. The first is rearrangement of N,O-diacylated compounds in the presence of 4-dimethylaminopyridine to give N,C(3)-diacylated products with identical acyl groups in the two positions. The second involves O-deacylation of the N,O-diacylated compounds, followed by O-acylation and rearrangement resulting N,C(3)-diacylated 2-oxindoles with different acyl groups in the two positions. (C) 2000 Elsevier Science Ltd. All rights reserved.
[EN] The invention relates to novel indolinone derivatives of formula I wherein X, Ri, R2, R3, R4, Rs, Re, Ri', FV/ FV/ IV and R5' are as shown herein as well as their use in the treatment of inflammatory autoimmune diseases such as multiple sclerosis, in particular for administration by the oral route. [FR] La présente invention concerne de nouveaux dérivés d'indolinone de formule I où X, Ri, R2, R3, R4, Rs, Re, Ri', FV/ FV/ IV et R5' sont tels que présentés dans la présente invention, ainsi que leur application au traitement de maladies inflammatoires auto-immunes telles que la sclérose en plaques, en particulier par administration par voie orale.