involves alkoxylradicals generated from N‐alkoxypyridinium salts. A wide range of alkenes are smoothly difunctionalized in an anti‐Markovnikov fashion, affording various functionalized alkyl alkyl ethers. Notably, this mild process tolerates a number of functional groups and is efficiently carried out under both batch and flow conditions. Importantly, electron paramagnetic resonance (EPR) experiments
Effective Au(<scp>iii</scp>)–CuCl<sub>2</sub>-catalyzed addition of alcohols to alkenes
作者:Xin Zhang、Avelino Corma
DOI:10.1039/b706961h
日期:——
Alkenes can be activated by Au(III) catalysts, and the effective addition of alcohols to alkenes can be carried out under mild conditions with Au(III), provided that catalytic amounts of CuCl(2) are added, which significantly stabilize the cationic Au(III).
Anodic oxidation of a series of substituted styrenes was investigated in methanol with a platinum and a graphite electrode. Use of the platinum anode gave mainly dimethoxylated monomers accompanied with one or more of three types of dimethoxylated dimers (αα-, αβ-, and ββ-dimers) depending on the substituents. Use of the graphite anode, however, afforded the ββ-dimers as the main product together with
To investigate the photochemical electron transfer from aromatic olefins to copper(II) or iron(III) ions, a series of substituted styrenes (1) was irradiated in the presence of copper(II) or iron(III) salts in methanol, which gave dimethoxylated monomers (2) and one or more of three types of dimethoxylated dimers [α,α- (3), α,β- (4), and β,β,-dimers (5)]. The formation of these products are reasonably
为了研究从芳族烯烃到铜 (II) 或铁 (III) 离子的光化学电子转移,在甲醇中存在铜 (II) 或铁 (III) 盐的情况下照射一系列取代的苯乙烯 (1),得到二甲氧基化单体(2)和三种二甲氧基化二聚体[α,α-(3)、α,β-(4)和β,β,-二聚体(5)]中的一种或多种。这些产物的形成合理地归因于通过电子从受激烯烃转移到金属离子而产生的烯烃的阳离子自由基的参与。发现底物上的取代基控制反应产物。
Kambe, Nobuaki; Fujioka, Toyozo; Ogawa, Akiya, Phosphorus and Sulfur and the Related Elements, 1988, vol. 38, p. 167 - 176