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Experimental chemical study demonstrates efficient synthesis of polyfunctionalized benzochromenes in water using Aliquat 336, highlighting an eco-friendly microwave-assisted protocol.
The synthesis, under microwave irradiation, of a series of polyfunctionalised 1 H- and 4H- chromenes in water in the presence of tricaprylmethylammonium bromide (Aliquat 336) as the catalyst is reported. This method has the advantages of high yields, neutral and inexpensive medium, simple work-up procedure and environmental friendliness.
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Patra et al. (2008) studied this question.
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