Mg-Al Hydrotalcite Catalyzed Efficient One-Pot Synthesis of 4-H-Benzo[b]Pyrans, 2-Aryl Benzimidazole and 2-Aryl-4,5-Dihydro-1H- Imidazole Derivatives
نویسندگان
چکیده
An environment friendly synthesis of 2-amino-3-cyano-4-aryl-7,7-dimethyl-5-oxo-4H-5,6,7,8-tetrahydrobenzo[b]pyran, 2aryl benzimidazole and 2-aryl-4, 5-dihydro-1H-imidazole derivatives using Mg-Al hydrotalcite as an efficient catalyst has been developed. The excellent efficiency of the catalyst can be attributed to its Lewis acidic sites which resulted in higher reaction yields for different substituted benzaldehydes and shorter reaction time compared to conventional synthetic procedures. An added advantage is reusability of the catalyst, which demonstrates consistent activity over significant number of cycles after filtration and washing with ethanol.
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