3-methylbut-2-enal furnished the conjugated imine 3b which cyclised with pyridine-tosyl chloride to yield the N-tosyl-tetrahydro-β-carboline 10; alternatively in pH 6.2 aqueous buffer the hydroxyisobutyl derivative 9b was formed. The reaction of L-tryptophan methyl ester with the same aldehyde and the possible biosynthetic relevance of these studies are discussed.
色胺和3-甲基丁-2-烯醛提供了共轭
亚胺3b,其与
吡啶-甲
苯磺酰氯环化,得到N-
甲苯磺酰基-四氢-β-咔啉10; 或者,在pH 6.2的
水性缓冲液中,形成了羟基异丁基衍
生物9b。讨论了
L-色氨酸甲酯与相同醛的反应以及这些研究可能的
生物合成相关性。