Arynes, generated by a number of methods, react with cinnamaldehyde to form flavenes; with benzaldehyde and p-methoxybenzaldehyde, 2,4-diaryl-1,3-benzodioxan derivatives are obtained, while, using p-nitrobenzaldehyde in the presence of acetone, a 2,2-dimethyl-4-p-nitrophenyl-1,3-benzodioxan derivative has been isolated.
H. Heaney and C. T. McCarty, J. Chem. Soc. D, 1970, 123a DOI: 10.1039/C2970000123A
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