已经开发了由烯烃的氨基卤化反应生成的1,2-邻位卤胺的尿素催化叠氮化。通过在空气中于室温下简单研磨底物,K 2 CO 3和催化量的尿素的固体混合物来进行这种快速而简单的方法。该反应提供了用于定量制备烯烃的大量氨基卤代衍生物(包括α,β-不饱和酮,α,β-不饱和酯和简单烯烃)中的氮丙啶的方案。对于该反应,已经提出了可能涉及氢键促进去质子化的机理。
Indium Trihalide Mediated Regioselective Ring Opening of Aziridines: A Facile Synthesis of 2-Haloamines
作者:J. S. Yadav、B. V. Subba Reddy、G. Mahesh Kumar
DOI:10.1055/s-2001-16775
日期:——
A variety of N-tosyl aziridines undergo ringopening with indium trihalides in acetonitrile at ambient temperature to afford the corresponding haloamines in excellent yields with high regioselectivity.
A variety of N-tosylaziridines undergo regioselectiveringopening with tetrabutylammonium halides in the presence of β-cyclodextrin in water at pH 4 and room temperature to afford the corresponding haloamines in excellent yields.
Aluminium Powder-Catalyzed Regio- and Stereoselective Aminobromination of α,β-Unsaturated Carbonyl Compounds and Simple Olefins with the<i>p</i>-Toluenesulfonamide/<i>N</i>-Bromosuccinimide (TsNH<sub>2</sub>-NBS) System
作者:Zhan-Guo Chen、Jun-Fa Wei、Ming-Zhen Wang、Li-Yan Zhou、Cong-Jie Zhang、Xian-Ying Shi
DOI:10.1002/adsc.200900343
日期:2009.10
The regio- and stereoselective aminobromination of α,β-unsaturated carbonyl compounds and simple olefins catalyzed by elementary aluminium powder has been established by using p-toluenesulfonamide (TsNH2) and N-bromosuccinimide (NBS) as the nitrogen/bromine sources. The reaction was convenient to carry out with a loading of 1 mol% catalyst at room temperature without inert gas protection. This method
KI-catalyzed aminobromination of olefins with TsNH2–NBS combination
作者:Jun-fa Wei、Li-hui Zhang、Zhan-guo Chen、Xian-ying Shi、Jing-jing Cao
DOI:10.1039/b904789a
日期:——
efficient KI-catalyzed aminobromination of olefins has been developed with good to excellent yields and high regio- and stereoselectivities under transition metal-free conditions. A series of olefins, including α,β-unsaturated carbonyl compounds and simple olefins, was studied. The reaction was performed in CH2Cl2 using KI as the catalyst and TsNH2 and NBS as the nitrogen and brominesources.
Silicon Powder: The First Nonmetal Elemental Catalyst for Aminobromination of Olefins with TsNH<sub>2</sub> and NBS
作者:Jun-Fa Wei、Zhan-Guo Chen、Wei Lei、Li-Hui Zhang、Ming-Zheng Wang、Xian-Ying Shi、Run-Tao Li
DOI:10.1021/ol9015833
日期:2009.9.17
alternative to transition metal catalysts for aminobromination of α,β-unsaturated carbonyl compounds and simple olefins with p-toluenesulfonamide (4-TsNH2) and NBS, affording the aminobrominated products in high yields and regio- and stereoselectivity. The high reactivity of electron-rich substrates reveals that the reaction has the electrophilic addition feature.