Canadian Journal of Chemistry

The photochemistry of trans-isohumulone, a bitter flavouring component of beer

AC Weedon, JS Morrison

Index: Weedon, Alan C.; Morrison, John S. Canadian Journal of Chemistry, 2008 , vol. 86, # 8 p. 791 - 798

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Citation Number: 2

Abstract

Methanolic solutions of trans-isohumulone (2), a major bitter flavouring component in beer, were irradiated with UV light of 313 nm wavelength and yielded four primary products containing an enolized cyclic β-triketone moiety: cis-isohumulone (3), humulone (1), dehydro-isohumulone (7), and dehydro-humulinic acid (5). The last of these products results from loss of the 4-methyl-3-pentenoyl side chain of trans-isohumulone. Nine volatile ...