Stereoselective construction of Bi-spirooxindole frameworks via a Michael addition/cyclization and an unexpected redox/oxidative coupling/cyclization.
DOI Number:
10.1016/j.tet.2016.11.001
Reaction Category:
MOP ID:
MOP_0000561
Educt:
N/C-substituted 2-(2-oxoindolin-3-ylidene)malononitrile, N/C-Substituted 3-hydroxyindolin-2-one
Product:
N/C-subsituted 5'-amino-2,2''-dioxodispiro[indoline-3,2'-furan-3',3''-indoline]-4'-carbonitrile
Catalyst:
Cinchonine Base
Cas No:
118-10-5
Associated Product from Buchler GmbH:
Cinchonine Base
Cas No:
118-10-5