亚硝酸叔丁酯(TBN)与各种内部烯烃的反应不同,从而产生有趣且有用的产物。使用亚硝酸叔丁酯(TBN),喹啉和K 2 S 2 O 8可从内部烯烃中合成1,2,5-恶二唑N-氧化物(呋喃烷)。在相同的反应条件下,α,β-不饱和羧酸以及环状和无环内部烯烃都分别通过脱羧和直接硝化途径提供了硝基烯烃作为唯一产物。
A Neutral Metal-Free System for Head-to-Tail Dimerization of Electron-Rich Alkenes
作者:A-Yun Luo、Yan Bao、Xiu-Fen Cheng、Xi-Sheng Wang
DOI:10.1055/s-0036-1589039
日期:2017.9
Abstract A neutral metal-free system for the head-to-tail dimerization of electron-rich alkenes with stoichiometric amount of BrCCl2H and NaI is reported. This reaction proceeds under mild conditions with high efficiency and broad scope. A neutral metal-free system for the head-to-tail dimerization of electron-rich alkenes with stoichiometric amount of BrCCl2H and NaI is reported. This reaction proceeds
Novel ruthenium-catalyzed reactions that employ ruthenium trichloride n-hydrate (RuCl3·nH2O) were investigated and dimerization, alkoxylation and sulfidation of olefins were noted. Adducts of Markovnikov type and anti-Markovnikov type were obtained in a stereospecific manner and in good yield, depending on the type of olefins used as the starting materials.
Highly efficient TfOH-catalyzed head-to-tail dimerization of vinylarenes
作者:Hui-Lan Yue、Xiao-Hui Zhao、Lei Jiang、Yun Shao、Li-Juan Mei
DOI:10.1080/00397911.2015.1127384
日期:2016.1.17
ABSTRACT A convenient and efficient TfOH-catalyzed head-to-tail dimerization of vinylarenes has been realized under mild conditions. The present protocol provides an attractive approach to a diverse range of higher olefins in good to excellent yields. GRAPHICAL ABSTRACT
Iron-Catalysed Regio- and Stereoselective Head-to-Tail Dimerisation of Styrenes
作者:Jose R. Cabrero-Antonino、Antonio Leyva-Pérez、Avelino Corma
DOI:10.1002/adsc.201000096
日期:——
Cationic iron salts and complexes catalyse the head‐to‐tail dimerisation of styrene derivatives to form the corresponding dimers with good to excellent yields and stereoselectivities. In particular, the use of a phosphine‐iron(III) complex allows the recovery and reuse of the catalyst. The counteranion plays an important role in both the activity and selectivity. These catalysts constitute an alternative