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8301697 
Journal Article 
Studies on 4-Hydroxycoumarins. XI. Cyclic Ketals of 3-(α-Acetonylbenzyl)-4-hydroxycoumarin 
Seidman, M; Link, KP 
1952 
Yes 
Journal of the American Chemical Society
ISSN: 0002-7863
EISSN: 1520-5126 
74 
8 
1885-1886 
English 
3-(α-Acetonylbenzyl)-4-hydroxycoumarin was condensed with benzyl alcohol, allyl alcohol, tetrahydrofurfuryl alcohol, ethylene glycol monoethyl ether, ethylene chlorohydrin, ethylene bromohydrin and trimethylene chlorohydrin in the presence of hydrogen chloride to form the corresponding cyclic ketals. Reaction with phenol and zinc chloride resulted in the formation of the dehydrated derivative, 2-methyl-4-phenyl-5-oxo-γ-pyrano(3,2-c)(1)benzopyran. This product was also obtained by treatment of the methyl ketal with acetic anhydride containing perchloric acid. © 1952, American Chemical Society. All rights reserved.