作者:Márta Porcs-Makkay、Gyula Argay、Alajos Kálmán、Gyula Simig
DOI:10.1016/s0040-4020(00)00477-4
日期:2000.8
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.