Cs
<sub>2</sub>
CO
<sub>3</sub>
Catalyzed Intramolecular Aminocarbonylation of Alkynes: Synthesis of 3‐Amino‐1
<i>H</i>
‐inden‐1‐ones from
<i>N</i>
‐
<i>tert</i>
‐Butyl‐2‐(1‐alkynyl)benzaldimines
作者:Zhen Guo、Tao Liu、Xiujuan Liang、Yuting Wu、Tuanli Yao
DOI:10.1002/adsc.201901349
日期:2020.3.4
3‐amino‐1H‐inden‐1‐ones from N‐tert‐butyl‐2‐(1‐alkynyl)benzaldimines via intramolecular aminocarbonylation of alkynes using Cs2CO3 as catalyst and air as oxidant has been developed. This highly atom‐efficient, transition‐metal‐free reaction proceeds under thermal conditions. We propose that the reaction proceeds through an unprecedented 5‐exo‐dig cyclization of N‐tert‐butyl‐2‐(1‐alkynyl)benzaldimines and thermal
的各种各样的合成3-氨基-1- ħ茚-1-酮从ñ -叔丁基-2-(1-炔基)经由使用铯炔烃的分子内的氨基羰基benzaldimines 2 CO 3作为催化剂和空气作为氧化剂具有已开发。这种高原子效率,无过渡金属的反应在热条件下进行。我们建议,通过了前所未有的5-反应进行外切-挖环化ñ -叔丁基-2-(1-炔基)benzaldimines和3-亚甲基2λ热重排2 -isoindolin -1-醇。
Ag(I)-Catalyzed Aminofluorination of Alkynes: Efficient Synthesis of 4-Fluoroisoquinolines and 4-Fluoropyrrolo[α]isoquinolines
作者:Tao Xu、Guosheng Liu
DOI:10.1021/ol3026507
日期:2012.11.2
A silver-catalyzedintramolecular oxidative aminofluorination of alkynes has been developed by using NFSI as a fluorinating reagent. This reaction represents an efficient method for the synthesis of various 4-fluoroisoquinolines and 4-fluoropyrrolo[α]isoquinolines.
Palladium-catalyzed domino Heck/intermolecular cross-coupling: efficient synthesis of 4-alkylated isoquinoline derivatives
作者:Tuanli Yao、Tao Liu、Changhui Zhang
DOI:10.1039/c6cc10075a
日期:——
A highly efficient Pd-catalyzed Heck-type cascade process with 2-(1-alkynyl)benzaldimines has been developed, which provides access to a broad range of 4-alkylated isoquinoline derivatives in moderate to good yields. The [sigma]-alkylpalladium(II)...
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。
Rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines by the intramolecular cyclization of 2-alkynylaldimines or 2-alkynylbenzylamines
rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines has been developed. When the 2-alkynylarylaldimines were reacted with various pronucleophiles, such as nitromethane, dimethyl malonate, and phenylacetylene, in the presence of a rhenium catalyst, cyclization and subsequent nucleophilic addition proceeded to give the corresponding 1,2-dihydroisoquinolines in moderate to good yields