Synthesis of 4<i>H</i>-furo[3,2<i>-b</i>]indole derivatives A new heterocyclic ring system
作者:Akira Tanaka、Kenichi Yakushijin、Shigetaka Yoshina
DOI:10.1002/jhet.5570140605
日期:1977.10
4H-Furo[3,2-b]indole (III) was prepared from deoxygenation of 2-(2-nitrophenyl)furan (II) with triethyl phosphite and thermolysis of 2-(2-azidophenyl)furan (VI). 4H- or 4-alkylfuro [3,2-b]indole-2-carboxaldehydes (VIII, IXa-c) were obtained by Vilsmeier formylation of the corresponding furo[3,2-b]indoles (III, VIIa-c). 4H-Furo[3,2-b]indole-2-carboxaldehyde (VIII) was submitted to the Cannizzaro, Wittig
由2-(2-硝基苯基)呋喃(II)与亚磷酸三乙酯的脱氧和2-(2-叠氮基苯基)呋喃(VI)的热解制备4 H-呋喃[3,2- b ]吲哚(III)。4 ħ -或4- alkylfuro [3,2 -b ]吲哚-2-羧醛(VIII,IXA -c)分别用对应的呋喃并维尔斯迈尔甲酰化得到[3,2- b ]吲哚(III,VIIA -c) 。将4 H-呋喃并[3,2 - b ]吲哚-2-甲醛(VIII)提交至坎蒂扎罗(Wanntig )和还原反应。通过4-乙基呋喃并[3,2 - b ]吲哚-2-甲醛(IXb)与胺的反应获得席夫碱。J.杂环化学。,14,975(1977)