References of 2,4-Cyclohexadien-1-one,3,5-dihydroxy-2,6,6-tris(3-methyl-2-buten-1-yl)-4-(3-methyl-1-oxobutyl)-
Title: Lupulon
CAS Registry Number: 468-28-0
CAS Name: 3,5-Dihydroxy-2,6,6-tris(3-methyl-2-butenyl)-4-(3-methyl-1-oxobutyl)-2,4-cyclohexadien-1-one
Synonyms: b-bitter acid; b-lupulic acid
Molecular Formula: C26H38O4
Molecular Weight: 414.58
Percent Composition: C 75.32%, H 9.24%, O 15.44%
Literature References: Antimicrobial constituent of hops. Isoln from commercial hops: Bungener,
Bull. Soc. Chim. Fr. [2]
45, 487 (1886); Barth, Lintner,
Ber. 31, 2022 (1898); W?llmer,
Ber. 49, 780 (1916); Lewis,
et al., J. Clin. Invest. 28, 916 (1949). Structure: W?llmer,
Ber. 58, 672 (1925); Wieland,
ibid. 102, 2012; Govaert, Verzele,
Bull. Soc. Chim. Belg. 58, 432 (1949); Riedl,
Ber. 85, 692 (1952). Toxicity study: R. H?nsel, H. H. Wagener,
Arzneim.-Forsch. 17, 79 (1967).
Properties: Prisms from 90% methanol, mp 92-94°. Bitter taste esp in alc soln. Turns yellow and amorphous within a few days with development of an odor. Perfectly stable
in vacuo even at 60°. Slightly acid reaction. Monobasic acid. Optically inactive. Soluble in methanol, ethanol, petr ether, hexane, isooctane. Slightly sol in neutral or acidic aq solns. Forms a sodium salt which is readily sol in water. The addition of 0.1% ascorbic acid exerts a marked protective action on the bacteriostatic activity of lupulon steamed or autoclaved at a concentration of 4 ppm in phosphate buffers at pH 6.5 and 8.5. LD50 in mice, rats (mg/kg): 525, 100 orally (H?nsel, Wagener).
Melting point: mp 92-94°
Toxicity data: LD50 in mice, rats (mg/kg): 525, 100 orally (H?nsel, Wagener)
