Abstract

Convenient syntheses of relatively rare 2,2-disubstituted-2,3-dihydro-1,4-benzodioxins from 2-substituted-2-hydroxy-2,3-dihydro-1,4-benzodioxins, as key synthetic intermediates, are reported. These new synthetic approaches require Lewis acid BF 3-Et 2O mediated nucleophilic substitution reaction or cyclization of suitable hydroxyphenols.

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