Structure and conversions of the condensation products of phenols with unsaturated carbonyl compounds

The reaction of 3,4-xylenol with crotonaldehyde leads to the formation of 2, 6, 7-trimethyl-4-(4, 5-dimethyl-2-hydroxyphenyl)chroman, whose structure is verified by IR and UV spectra, by the synthesis of the methyl and the benzoyl esters, and by the investigation of the conditions and the products of pyrolisis.The IR spectrum of a paste of IV in vaseline oil was recorded on a IKS-14 apparatus