Synthesis of 4<i>H</i>-furo[3,2-<i>b</i>]indole derivatives. III. Preparation of 4<i>H</i>-furo[3,2-<i>b</i>]indole-2-carboxylic acid derivatives
作者:Akira Tanaka、Kenichi Yakushijin、Shigetaka Yoshina
DOI:10.1002/jhet.5570160435
日期:1979.6
Methyl or ethyl 4H-furo[3,2-b]indole-2-carboxylates (Va,b) were prepared from deoxygenation of methyl or ethyl 5-(2-nitrophenyl)-2-furoates (IIIa,b) and thermolysis of methyl or ethyl 5-(2-azidophenyl)-2-furoates (VIIIa,b). 4H-Furo[3,2-b]indole-2-carboxylic acid amides (XIa-h) were obtained by the reaction of 4H-furo[3,2-b]indole-2-carboxyl chloride (X) with the appropriate amines.
甲基或乙基4 H-呋喃[3,2 - b ]吲哚-2-羧酸酯(Va,b)是通过对5-(2-硝基苯基)-2-呋喃甲酸甲酯或乙基(IIIa,b)脱氧并进行热解制备的5-(2-叠氮苯基)-2-糠酸酯的甲基或乙基(VIIIa,b)。4 H-呋喃[3,2 - b ]吲哚-2-羧氯(X)与四氢呋喃[3,2 - b ]吲哚-2-羧酰氯(X)反应制得4 H-呋喃[3,2 - b ]吲哚-2-羧酸酰胺(XIa-h)适当的胺。