Bismuth nitrate pentahydrate is found to be an efficient catalyst for the synthesis of 1,5-benzodiazepines and b-amino carbonyl compounds using condensation of o-phenylenediamine with ketones and one pot three component Mannich reaction, respectively under solvent free conditions at room temperature. This method offers a simple, solvent free, room temperature, environment friendly synthesis of 1,5-benzodiazepines and b-amino carbonyl compounds. The products are isolated by column chromatography and recrystallization, respectively and were characterized by their melting point, IR and 1H NMR spectroscopy.
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水合
硝酸铋被发现是一种高效的催化剂,可在无溶剂、室温条件下分别通过
邻苯二胺与酮的缩合反应以及一锅法三组分曼尼希反应合成1,5-苯二氮杂卓和β-
氨基羰基化合物。这种方法提供了一种简单、无溶剂、室温、环境友好的合成1,5-苯二氮杂卓和β-
氨基羰基化合物的方式。产物分别通过柱层析和重结晶进行分离,并利用熔点、红外光谱和核磁共振氢谱进行表征。