Silver-catalyzed cascade cyclization–stannylation of o-alkynylaniline derivatives with 2-tributylstannylfuran: an efficient synthesis of (3-indolyl)stannanes
作者:Jun Liu、Xin Xie、Yuanhong Liu
DOI:10.1039/c3cc46524a
日期:——
A straightforward synthesis of (3-indolyl)stannanes through silver-catalyzed cyclizationâstannylation of N-electron-withdrawing group-substituted o-alkynylanilines in the presence of 2-tributylstannylfuran is developed. This method offers several advantages such as no requirement of additional ligands, high efficiency and a wide reaction scope.
An aerobic copper-mediateddominoreaction for the synthesis of 3-(trifluoromethylseleno)indoles by trifluoromethylselenolation of N-Ts 2-alkynylaniline with [(bpy)CuSeCF3]2 is reported. This reaction proceeds through sequential oxidation, alkyne coordination, and deprotonation followed by reductive elimination. This mild and robust method is highly functional group tolerant and provides straightforward
Palladium-Catalyzed Synthesis of Functionalized Indoles by Acylation/Allylation of 2-Alkynylanilines with Three-Membered Rings
作者:Weiliang Yuan、Xiaojiao Li、Zisong Qi、Xingwei Li
DOI:10.1021/acs.orglett.2c00246
日期:2022.3.25
Palladium-catalyzed synthesis of 3-acyl and -allyl indoles has been realized by merging nucleophilic cyclization of ortho-alkynylanilines with ring opening of three-memberedrings such as cyclopropenones and gem-difluorinated cyclopropanes. These functionalized indoles were obtained in moderate to high yields with high stereoselectivity in both cases. This protocol provides an alternative method toward
Palladium-catalyzed nucleomethylation of alkynes for synthesis of methylated heteroaromatic compounds
作者:Xi Yang、Gang Wang、Zhi-Shi Ye
DOI:10.1039/d2sc03294e
日期:——
efficient palladium-catalyzed nucleomethylation of alkynes for the simultaneous construction of the heteroaromatic ring and methyl group. The 3-methylindoles, 3-methylbenzofurans and 4-methylisoquinolines were obtained in moderate to excellent yields. Notably, this methodology was employed as a key step for synthesis of a pregnane X receptor antagonist, zindoxifene, bazedoxifene and AFN-1252. The kinetic studies
在此,我们公开了一种新颖且有效的钯催化炔烃核甲基化,用于同时构建杂芳环和甲基。3-甲基吲哚、3-甲基苯并呋喃和4-甲基异喹啉以中等至优异的产率获得。值得注意的是,该方法被用作合成孕烷 X 受体拮抗剂、津多昔芬、巴多昔芬和 AFN-1252 的关键步骤。动力学研究表明,还原消除可能是决定速率的步骤。
Tf<sub>2</sub>O‐Catalyzed Tandem Cyclization/Trifluoromethylselenolation of Alkynes for Synthesis of CF<sub>3</sub>Se‐Containing Heterocycles
practical Tf2O-catalyzed tandem cyclization/trifluoromethylselenolation of alkynes with EtOH as the green solvent was developed. Various CF3Se-containing heterocycliccompounds, including indoles, benzofurans, benzothiophenes, isoquinolines and chromenes have been synthesized with trifluoromethyl selenoxides as CF3Se source.