抄録
Three synthetic lupulone analogues, i. e., 1-acetyl-3, 3, 5-tri-allyl-, 1-acetyl-3, 3, 5-tri-n-propyland 1-acetyl-3, 3, 5-tri-n-butyl-hexadiene-(1, 5)-diol-(2, 6)-on-(4) did not cause sunlight flavor of beer when they were added to a fermented solution of sucrose and exposed to sunlight.
When methanol solutions of humulone and acetolupuphenonen were exposed to sunlight, changes in the UV-absorption spectra were observed. This fact indicates that humulone and acetolupuphenone underwent some photochemical reaction upon exposure to sunlight.
Prenyl (γ, γ-dimethylallyl) mercaptan was synthesized, which gave a typical sunlight flavor when it was added, in a trace amount, to a fermented solution of sucrose.
