The retention time of the reduction products in gas chromatography, and hence their quantitative determination were made from the change of peaks, in the process of reduction of guaiazulene and decahydroguaiazulene by absorbing 1, 2, 3, 4 and 5 mole of hydrogen to guaiazulene. By the absorption of one mole of hydrogen, even though in a very minute amount, di-, tetra-, hexa-, octa- and decahydroguaiazulene are formed and up to 2 mole absorption of hydrogen, unreacted guaiazulene was found to be present, and as the reduction proceeds, the color changed from violet blue to greenish blue, greenish yellow and colorless finally. By the irradiation of γ-ray to the guaiazulene solution, di-, tetra-, hexa-, octa- and decahydroguaiazulene production was identified from the retention time of gas chromatography. The greater the concentration and irradiation, the greater the reduction and, even though it is a trace, five kinds of reduction products were identified after 10
2 R irradiation. On the other hand, by the irradiation of decahydroguaiazulene, prepared by the catalytic reduction, a lower reduction compounds were produced. That is, after the dehydrogenation, guaiazulene and hydroguaiazulene are transformed to faint yellowish orange oxygen-containing crystal by the γ-ray irradiation, but nothing had not been recognized with decahydroguaiazulene. The irradiated samples became sticky and the γ-ray irradiation was found to cause oxidation, reduction and also polymerization.
抄録全体を表示