Tertiary Amine-Triggered Cascade S<sub>N</sub>2/Cycloaddition: An Efficient Construction of Complex Azaheterocycles under Mild Conditions
作者:Jian Hu、Bing Tian、Xinyan Wu、Xiaofeng Tong
DOI:10.1021/ol302329b
日期:2012.10.5
In this paper, an amine-triggeredcascade SN2/cycloaddtion sequence between 2-(acetoxymethyl)buta-2,3-dienoate 1 and various π-system functionalized tosylamides 3 has been reported, which provides a facile method for stereoselective construction of structurally diverse azaheterocycles.
在本文中,已经报道了在2-(乙酰氧基甲基)丁2,3-二烯酸酯1和各种π-系统官能化的甲苯磺酰胺3之间的胺触发级联S N 2 /环加成序列,为立体选择性构建Sn 2提供了一种简便的方法。结构上不同的氮杂杂环。
Divergent gold-catalysed reactions of cyclopropenylmethyl sulfonamides with tethered heteroaromatics
作者:Melanie A. Drew、Sebastian Arndt、Christopher Richardson、Matthias Rudolph、A. Stephen K. Hashmi、Christopher J. T. Hyland
DOI:10.1039/c9cc06241f
日期:——
Cyclopropenylmethyl sulfonamides with tethered heteroaromatics have been demonstrated to undergo divergent gold-catalysed cyclisation reactions. A formal dearomative (4+3) cycloaddition takes place with furan-tethered substrates, yielding densely functionalised 5,7-fused heterocycles related to the bioactive curcusone natural products. Indole-tethered substrates display divergent reactivity giving
Gold Catalysis: Phenol Synthesis in the Presence of Functional Groups
作者:A. Stephen K. Hashmi、Jan P. Weyrauch、Elzen Kurpejović、Tanja M. Frost、Burkhard Miehlich、Wolfgang Frey、Jan W. Bats
DOI:10.1002/chem.200501268
日期:2006.7.24
acylated hydroxymethyl and ammonium groups, on the furan ring of substrates in gold-catalyzed phenolsynthesis has been investigated. The furan ring was also replaced by different heterocycles, such as pyrroles, thiophenes, oxazoles, and a 2,4-dimethoxyphenyl group; goldcatalysis then delivered no phenols, but occasionally other products were obtained. [Ru(3)(CO)(12)] also catalyzed the conversion
作者:Matthias Rudolph、Melissa Q McCreery、Wolfgang Frey、A Stephen K Hashmi
DOI:10.3762/bjoc.7.90
日期:——
Efforts to trap early intermediates of the gold-catalyzed phenolsynthesis failed. Neither inter- nor intramolecularly offered vinyl groups, ketones or alcohols were able to intercept the gold carbenoid species. This indicates that the competing steps of the gold-catalyzed phenolsynthesis are much faster than the steps of the interception reaction. In the latter the barrier of activation is higher
Compounds of the present invention, and pharmaceutically acceptable compositions thereof, are useful as modulators of ATP-Binding Cassette (“ABC”) transporters or fragments thereof, including Cystic Fibrosis Transmembrane Conductance Regulator (“CFTR”). The present invention also relates to methods of treating ABC transporter mediated diseases using compounds of the present invention.