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A variety of novel 2-hydroxy-1,4-benzoxazines were synthesised through the Petasis multicomponent reaction of 2-[(arylmethyl)amino] phenols with arylboronic acids and glyoxal catalysed by pyridinium toluene- p-sulphonate. A plausible reaction mechanism has also been proposed.
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Mahdjoub et al. (2016) studied this question.
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