2-Methoxy- (10), 2-hydroxy- (15), and 2, 6-dimethoxy- (20) p-benzoquinonetropide were synthesized by the dehydrogenation of tropylated guaiacol, catechol, and pyrogallol dimethyl ether respectively. The electronic spectra of 10, 15, and 20 in water showed their long wavelength absorption maxima at 550–570 mμ. However, the spectra of these compounds in chloroform showed that the peaks had shifted to
2-甲氧基- (10)、2-羟基- (15) 和 2, 6-二甲氧基- (20)
对苯醌托品分别通过托
吡醇、
儿茶酚和连苯三
酚二
甲醚的脱氢合成。
水中 10、15 和 20 的电子光谱显示它们的长波长吸收最大值在 550-570 mμ。然而,这些化合物在
氯仿中的光谱表明,这些峰的波长比
水中的短 38-60 mμ。这种类型的溶剂效应可以理解为由跃迁到比基态更具极性的激发态引起的。