Potassium Hydroxide/Dimethyl Sulfoxide Promoted Intramolecular Cyclization for the Synthesis of Benzimidazol-2-ones
作者:Astrid Beyer、Christine M. M. Reucher、Carsten Bolm
DOI:10.1021/ol2008878
日期:2011.6.3
A new protocol for intramolecular N-arylations of ureas to form benzimidazol-2-ones has been developed. The cyclization reaction occurs In the presence of KOH and DMSO at close to ambient temperature. Under these conditions the yields are high and a wide range of functional groups are tolerated.
BIANCHI, M.;BUTTI, A.;ROSSI, S.;BARZAGHI, F.;MARCARIA, V., EUR. J. MED. CHEM.-CHIM. THER., 1981, 16, N 4, 321-326
作者:BIANCHI, M.、BUTTI, A.、ROSSI, S.、BARZAGHI, F.、MARCARIA, V.