从2-乙酰氨基芳基二呋喃甲烷甲烷或2-氨基芳基二呋喃甲烷甲烷经HCl甲醇溶液处理,详细阐述了呋喃[2',3':3,4]环庚[1,2- b ]吲哚氯化物的新合成方法。反应按三个步骤进行:再循环,分子内环化和歧化。在这种情况下,呋喃环参与构建吡咯和七元环。可以在类似条件下直接从2-乙酰氨基苯甲醛和2-甲基呋喃获得相同的盐,而无需分离相应的2-乙酰氨基芳基二呋喃甲烷。
Synthesis of 2,4‐difuryl‐4
<i>H</i>
‐3,1‐benzothiazines via a furan ring migration reaction
作者:Vladimir T. Abaev、Fatima A. Tsiunchik、Alexander V. Butin、Andrey V. Gutnov
DOI:10.1002/jhet.5570450227
日期:2008.3
Abstractmagnified imageA new simple synthetic approach to 2,4‐difuryl‐4H‐3,1‐benzothiazines from 2‐isothiocyanoaryldifuryl‐methanes in the presence of acidic catalyst is described. This rearrangement is a new example of furan ring migration reaction resulting from intramolecular attack with electrophilic carbon.
Reduction of bis(5-alkyl-2-furyl)(2-nitroaryl)methane with aqueous titanium trichloride solution
作者:Dong-Kun Li、Jing-Yi Tan、Wei Deng、Zheng-Yang Xu
DOI:10.1016/j.tet.2021.132407
日期:2021.10
In this article, we introduces a new method for the synthesis of substituted indole by reductive recyclization of bis(5-alkyl-2-furyl)(2-nitroaryl)methane. Bis(5-alkyl-2-furyl)(2-nitroaryl)methane undergo reduction to provide indole or aniline. In the process of research, we found that the chemoselecitivity of reduction was controlled by subtle differences in the electronic effects of the substrate
Furan ring opening - indole ring closure: Synthesis of furo[2′,3′:3,4]-cyclohepta[1,2-<i>b</i>]indolium chlorides
作者:Alexander V. Butin、Sergey K. Smirnov、Tatyana A. Stroganova
DOI:10.1002/jhet.5570430315
日期:2006.5
2-acetylaminoaryldifurylmethanes or 2-aminoaryldifurylmethanes under treatment with methanolic HCl solution. The reaction proceeds in three steps: recyclization, intramolecular cyclization, and disproportionation. In this case the furanring takes part in building up both pyrrole and seven-membered rings. The same salts can be obtained directly from 2-acetylaminobenzaldehydes and 2-methylfuran under similar
从2-乙酰氨基芳基二呋喃甲烷甲烷或2-氨基芳基二呋喃甲烷甲烷经HCl甲醇溶液处理,详细阐述了呋喃[2',3':3,4]环庚[1,2- b ]吲哚氯化物的新合成方法。反应按三个步骤进行:再循环,分子内环化和歧化。在这种情况下,呋喃环参与构建吡咯和七元环。可以在类似条件下直接从2-乙酰氨基苯甲醛和2-甲基呋喃获得相同的盐,而无需分离相应的2-乙酰氨基芳基二呋喃甲烷。