Reactions of furocoumarins. II. Synthetic aminomethyl psoralens<i>via</i>chloromethylation or benzylic bromination
作者:Kurt D. Kaufman、Dennis J. Erb、Thomas M. Blok、Robert W. Carlson、Donald J. Knoechel、Lincoln Mcbride、Thomas Zeitlow
DOI:10.1002/jhet.5570190515
日期:1982.9
Several psoralen derivatives have been synthesized in order to evaluate their efficacy as photochemotherapeutic (PUVA) agents, including a variety of 4′-substituted-4,5′,8-trimethypsoralen compounds (1d-j). Improved synthesis of the very potent photosensitizers 8-methylpsoralen (6a) and 4,8-dimethylpsoralen (6b) are described and 6a has been shown to undergo formylation in the 4′-position. Free radical
为了评估其作为光化学治疗剂(PUVA)的功效,已经合成了几种补骨脂素衍生物,包括各种4'-取代的-4,5',8-三甲基补骨脂素化合物(1d-j)。改进的非常有效的光敏剂8 methylpsoralen(合成6A)和4,8- dimethylpsoralen(图6b)中描述和图6a已被证明在4'-位经历甲酰化。用NBS对6a和6b进行的自由基溴化作用主要产生8-溴甲基衍生物(8a和d),这些衍生物很容易转化为8-氨基甲基衍生物(8c和f)的方法。如果4'-位被阻断,则亲电取代显然主要发生在补骨脂素系统的5'-位。至少,4′-甲基补骨脂素(9)的氯甲基化主要提供5′-氯甲基衍生物(10a和d),这也导致氨基甲基补骨脂素(10c和f)。