2H-benzimidazoles (isobenzimidazoles). Part 6. Sulfur derivatives
作者:Justine C. Hazelton、Brian Iddon、Hans Suschitzky、Ley H. Woolley
DOI:10.1039/p19920000685
日期:——
The products obtained by treating 2H-benzimidazole-2-spirocyclohexane 1 or its 5-chloro derivative 9 with various thiols (PrSNa, Bu(t)SNa, PhSNa, pyridine-2-thiol, or pyrimidine-2-thiol) depend on the reaction conditions. Monosubstitution is possible and any number of alkylthio groups can be introduced up to four.5-Phenylsulfonyl- 18 and 5-nitro-2H-benzimidazole-2-spirocyclohexane 10 react with pyridine-2-thiol or pyrimidine-2-thiol in position-4 whilst the 5-(pyridin-2-ylthio) derivative 16 reacts with sodium benzenesulfinate in position-6. In all cases the products isolated were the 1,3-dihydro compounds 26, 38, 39 or 21, respectively.
Reaction of 1,2-diamino-4-nitrobenzene with 1,5-diketones. Synthesis and oxidative reactions of nitrobenzimidazoles
作者:V. A. Kaminskii、O. Yu. Slabko、M. V. Gomolach
DOI:10.1007/bf00509705
日期:1990.7
HERBERT, JOHN A. L.;IDDON, BRIAN;ROBINSON, ANDREW G.;SUSCHITZKY, HANS, J. CHEM. SOC. PERKIN TRANS.,(1988) N 5, 991-997
作者:HERBERT, JOHN A. L.、IDDON, BRIAN、ROBINSON, ANDREW G.、SUSCHITZKY, HANS
DOI:——
日期:——
Herbert, John A. L.; Iddon, Brian; Robinson, Andrew G., Journal of the Chemical Society. Perkin transactions I, 1988, p. 991 - 998
作者:Herbert, John A. L.、Iddon, Brian、Robinson, Andrew G.、Suschitzky, Hans
DOI:——
日期:——
Alumina Supported 12-Tungstophosphoric Acid as an Efficient and Reusable Catalyst for Synthesis of 1,5-Benzodiazepines
Aluminasupported12-tungstophosphoricacid catalyzes efficiently the reaction of o-phenylenediamine with ketones under solvent-free condition to afford the corresponding 1,5-benzodiazepines in good to excellent yields. The catalyst can be recovered and reused.