Silicon Powder: The First Nonmetal Elemental Catalyst for Aminobromination of Olefins with TsNH<sub>2</sub> and NBS
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Silicon powder was found, for the first time, to be an efficient 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.
创建时间：
2009-09-17
