A general synthetic route for 1-substituted 4-oxygenated β-carbolines (Synthetic studies on indoles and related compounds 41)
作者:Hideharu Suzuki、Chiemie Iwata(nee Miyaga)、Katsumi Sakurai、Kazuhiko Tokumoto、Hiroko Takahashi、Masako Hanada、Yuusaku Yokoyama、Yasuoki Murakami
DOI:10.1016/s0040-4020(96)01112-x
日期:1997.2
A new synthetic route for two naturally accuring 1-substituted 4-methoxy-β-carbolines (1b, c) is described. This synthetic route involves elaboration of the ester groups in ethyl indole-2-carboxylate (4b) and its 1-benzyl derivative (4a), C3-selective cyclization of the substituent at the C2-position of the indole nucleus, and functionalization at the C1-position of the β-carboline nucleus by a modified
描述了一种新的合成途径,用于合成两个自然积累的1-取代的4-甲氧基-β-咔啉(1b,c)。该合成途径涉及吲哚-2-羧酸乙酯(4b)及其1-苄基衍生物(4a)中酯基的修饰,吲哚核C 2位上取代基的C 3选择性环化和官能化。通过修饰的Reissert-Henze反应在β-咔啉核的C 1位上反应。合成的β-咔啉(1b,c)应该是合成其同类物的关键中间体,从而导致1-取代的4-氧化的β-咔啉的一般合成路线。