No abstract

The 1,3-dihydro-1-(2-bromoethyl)-3-isopropenyl-2H-benzimidazol-2-one was used as a starting material for making of the title compound. This compound treated with piperizine in the presence of TBAB as a catalyst which is treated with m-trifluoromethyl bromobenzene, in the presence of base and palladium acetate than followed by passing HCl gas to produced corresponding title compound in good yield with high purity. The structures of all the synthesized compounds were confirmed by IR, 1 H NMR, C 13NMR and Mass Spectral data.

No abstract

Synthesis and Reactions of 4H-Imidazo(4,5-e)(2,1,3)benzothiadiazol-5( 6H)-one.-The condensation of the diamino benzothiadiazole (I) with urea provides the imidazo derivative (III). Some reactions such as oximation and dialkylation are investigated. Corresponding monosubstituted derivatives of type (XI) are prepared via independently produced isoprenyl derivatives. -(RAO, D. M.; GIRIDHAR, T.; PRASAD, G. V.; REDDY, R. B.; CHANDRA MOULI, G. V. P.; Heterocycles 45 (1997) 1, 19-28; Res. Dev. Cent., Cheminor

Die Carbamate (I) cyclisieren sich in Pyridin in Gegenwart von Triäthylamin, wobei die Cyclisierungsgeschwindigkeit wahrscheinlich von der Konzentration der intermediär gebildeten dipolaren Ionen (II) abhängt, zu den Azaanhydriden (III).