197776-00-4Relevant articles and documents
Synthesis of Oxindoles and Benzofuranones via Oxidation of 2-Heterocyclic BMIDAs
Seath, Ciaran P.,Fyfe, James W. B.,Molloy, John J.,Watson, Allan J. B.
, p. 891 - 898 (2017/02/15)
The synthesis of functionalized oxindoles and benzofuranones via oxidation of 2-BMIDA indoles and benzofurans, respectively, is described. Interconversion of boron species (BMIDA→BF3K) was necessary to enable oxidation and overcome boronic acid stability issues associated with a difficult BMIDA hydrolysis. Overall, a robust process was developed that allowed access to a small library of oxindole and benzofuranone products and facilitated the step-efficient synthesis of biologically active compounds containing the oxindole pharmaco-phore.
Synthesis of 1,3-di[alkoxy(aryloxy)carbonyl]-2-oxo-2,3-dihydroindoles
Porcs-Makkay, Márta,Argay, Gyula,Kálmán, Alajos,Simig, Gyula
, p. 5893 - 5903 (2007/10/03)
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. Th
New practical synthesis of tenidap
Porcs-Makkay, Marta,Simig, Gyula
, p. 10 - 16 (2013/09/07)
The development of a new, practical synthesis to tenidap is described. N,O-Dialkoxy(aryloxy)carbonylation of 5-chloro-2-oxo-2,3-dihydroindole, followed by removal of the O-alkoxy-(aryloxy)carbonyl group gave 1-[alkoxy(aryloxy)carbonyl]-5-chloro-2-oxo-2,3-dihydroindoles in good yields. The latter compounds were thenoylated in the 3-position. The role of DMAP in the acylation reaction is discussed. The structures of the thenoylated products and their enolate salts were investigated both in solution and solid phases. Ammonolysis of 5-chloro-3-[1-hydroxy-1-(2-thienyl)methylene]-2-oxo-1-phenoxycarbonyl-2,3- dihydroindole afforded the corresponding 1-carbamoyl derivative (tenidap) in high yield. The corresponding 1-ethoxy- and 1-methoxycarbonyl derivatives could not be similarly transformed to tenidap; loss of the alkoxycarbonyl moiety occurred instead of carbamoylation.