Reductive Coupling between C–N and C–O Electrophiles
作者:Rong-De He、Chun-Ling Li、Qiu-Quan Pan、Peng Guo、Xue-Yuan Liu、Xing-Zhong Shu
DOI:10.1021/jacs.9b05224
日期:2019.8.14
The cross-electrophile reaction is a promising strategy for C-C bond formation. Recent studies have focused mainly on reactions with organic halides. Here we report a coupling reaction between C-N and C-O electrophiles that demonstrates the possibility of constructing a C-C bond via C-N and C-O cleavage. Several reactions between benzyl/aryl ammonium salts and vinyl/aryl C-O electrophiles have been
交叉亲电反应是 CC 键形成的一个有前景的策略。最近的研究主要集中在与有机卤化物的反应上。在这里,我们报告了 CN 和 CO 亲电试剂之间的偶联反应,证明了通过 CN 和 CO 裂解构建 CC 键的可能性。已经研究了苄基/芳基铵盐和乙烯基/芳基 CO 亲电试剂之间的几种反应。初步机理研究表明,苄基铵是通过自由基机制活化的。
An efficient α-hydroxylation of carbonyls using the HOF•CH3CN complex
作者:Sharon Dayan、Yifat Bareket、Shlomo Rozen
DOI:10.1016/s0040-4020(98)01173-9
日期:1999.3
The complexHOF•CH3CN, made directly from fluorine and aqueous acetonitrile, was used for α-hydroxylation of various ketones, esters and acids via their trimethyl silyl enol ethers. The reaction is usually complete in a few minutes at room temperature or below and has high yields.
Taming elemental fluorine: Indirect use of fluorine for the synthesis of α-fluoroketones[1]
作者:Shlomo Rozen、Ynon Menahem
DOI:10.1016/s0022-1139(00)85146-5
日期:1980.7
Fluorine and sodium trifluoroacetate react at −75° to produce a variety of fluoroxy-compounds. Although it is possible to direct the reaction towards the formation of CF3COOF or CF3CF2OF, mixtures may be used when only the electrophilicfluorine has to be attached to the molecule of interest. Such is the case of the reaction of enol-acetates with the mixture of the fluoroxy reagents. A wide variety
Iodination of Enol Acetates and 1,3-Diones Using<i>N</i>-Iodosaccharin
作者:Darko Dolenc
DOI:10.1081/scc-120022182
日期:2003.1.8
Abstract Iodination of enolacetates and 1,3-diones with N-iodosaccharin yielding the corresponding α-iodoketones and 2-iodo-1,3-diones is presented. Reactions are carried out at room temperature under neutral conditions and in short reaction times.
1-fluoro-4-hydroxy-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate): An electrophilic fluorinating agent
作者:Andrew J. Poss、George A. Shia
DOI:10.1016/s0040-4039(99)00303-2
日期:1999.4
1-Fluoro-4-hydroxy-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate), NFTh, is a electrophilicfluorinating that can be used to fluorinate aromatic rings, olefins, dienol acetates and enol ethers. When NFTh is reacted with an active methylene compound in the presence of ZnCl2, the corresponding monoor di-fluoro derivative can be isolated.