The ultra high pressure conjugate addition of indoles to electron-deficient olefins
作者:Paul Harrington、Michael A Kerr
DOI:10.1139/v98-158
日期:1998.9.1
The addition of indole and methyl indole at both high and ambient pressures to a series of Michael acceptors under the influence of ytterbium triflate was investigated. Under ambient pressure the more reactive and less stericallyhindered electrophiles gave the expected 3-alkylated indoles in good to excellent yields. The more problematic Michael acceptors were subjected to pressures of 13 kbar. In
研究了在三氟甲磺酸镱的影响下,在高压和环境压力下将吲哚和甲基吲哚添加到一系列迈克尔受体中。在环境压力下,反应性更强且空间位阻较小的亲电子试剂以良好至极好的产率得到预期的 3-烷基化吲哚。问题较多的迈克尔受体承受 13 kbar 的压力。在所有情况下,都观察到反应时间的显着减少和产率的显着提高。在涉及 3-methylcyclohex-2-en-1-one 的情况下,形成了副产物并通过单晶 X 射线衍射表征。α、β-不饱和酮的产率最高。Enals 倾向于聚合,而 enoates 被证明太不活泼了。
A New Amphiphilic Brønsted Acid as Catalyst for the Friedel-Crafts Reactions of Indoles in Water
作者:Yuan Cheng、Xiongyu Ou、Jimei Ma、Linhao Sun、Zhong-Hua Ma
DOI:10.1002/ejoc.201801612
日期:2019.1.10
A designed Brønsted acid enables Friedel–Crafts alkylation of indoles in water, whose hydrophobic aggregations of fluorocarbon chains, along with phenyl ring, protected acid sites from bulk water and enriched the substrates. The amphiphilic structure has been proven crucial for the high catalytic efficiency.
Compounds of formula (I)
and pharmaceutically acceptable salts thereof are agonists at the beta-2 adrenoceptor. They are useful as feed additives for livestock animals.
式(I)的化合物及其药用可接受的盐是β-2肾上腺素受体的激动剂。它们可用作家畜动物的饲料添加剂。
Task-specific ionic-liquid-catalyzed efficient synthesis of indole derivatives under solvent-free conditions
A sulfonic-acid-functionalized ionic liquid is used as a Bronsted acid catalyst for the efficientsynthesis of indolederivatives in good-to-high yields at room temperature undersolvent-free condi...
ZrCl4 catalyzed highly selective and efficient Michael addition of heterocyclic enamines with α,β-unsaturated olefins
作者:Vijay Kumar、Sukhdeep Kaur、Subodh Kumar
DOI:10.1016/j.tetlet.2006.07.116
日期:2006.9
Highly selective and efficientMichaeladditions of heterocyclic enamines, viz. indoles, pyrroles, and pyrazoles with α,β-unsaturated olefins using 2 mol % of ZrCl4 has been achieved.