A General Approach to Substituted Benzimidazoles and Benzoxazoles
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Heterogeneous Palladium‐Catalyzed Hydrogen‐Transfer with Primary Amines
作者:Marianna Pizzetti、Elisa De Luca、Elena Petricci、Andrea Porcheddu、Maurizio Taddei
DOI:10.1002/adsc.201200253
日期:2012.9.17
employed. Primaryamines are the most suitable reagents for the atom economy of the overall process that resulted to be general as several different substitutedbenzimidazoles were obtained in good yield. Benzoxazoles can be also prepared starting from primaryamines and o‐aminophenol. The reaction is also highly selective as no (poly)‐alkylated phenylenediamines or cross‐contaminated benzimidazoles are
Supercritical methanol as solvent and carbon source in the catalytic conversion of 1,2-diaminobenzenes and 2-nitroanilines to benzimidazoles
作者:Zhuohua Sun、Giovanni Bottari、Katalin Barta
DOI:10.1039/c5gc01040c
日期:——
Benzimidazoles and N-methylbenzimidazoles were synthesized by simply heating 1,2-diaminobenzenes in supercritical methanol over copper-doped porous metal oxides.
苯并咪唑和N-甲基苯并咪唑是通过在掺铜多孔金属氧化物中超临界甲醇中加热1,2-二氨基苯合成的。
tert-Butyl nitrite catalyzed synthesis of benzimidazoles from o-phenylenediamine and aldehydes at room temperature
A simple and efficient method is demonstrated for the synthesis of benzimidazoles via cyclocondensation of o-phenylenediamine with aldehydes in the presence of catalytic amount of tert-butyl nitrite. All the reactions were carried out at room temperature while the desired products were obtained in good to excellent yields.
Synthesis of benzimidazoles via iridium-catalyzed acceptorless dehydrogenative coupling
作者:Xiang Sun、Xiao-Hui Lv、Lin-Miao Ye、Yu Hu、Yan-Yan Chen、Xue-Jing Zhang、Ming Yan
DOI:10.1039/c5ob00904a
日期:——
Benzimidazoles were prepared in good yieldsviathe iridium-catalyzed acceptorless dehydrogenative coupling of tertiary amines and arylamines.
苯并咪唑类化合物通过铱催化的受体无氧脱氢偶联反应,产率较高。
A Cu (NO3)2.3H2O catalysed facile synthesis of substituted 4(3H)-quinazolinones and benzimidazoles
作者:G A N K DURGAREDDY、R RAVIKUMAR、S RAVI、SRINIVAS R ADAPA
DOI:10.1007/s12039-012-0343-0
日期:2013.1
One pot synthesis of alkyl, aryl, heteroaryl mono(2)substituted 4(3H)-quinazolinones and 2-aryl or heteroaryl, 1-arylmethyl or heteroarylmethyl -1H-benzimidazoles using a water soluble Cu (NO3)2.3H2O catalyst at room/ambient temperature in excellent yield. One pot synthesis of alkyl, aryl, heteroaryl mono(2)substituted 4(3H)-quinazolinones and 2-aryl or heteroaryl, 1-arylmethyl or heteroarylmethyl-1H-benzimidazoles