ol9015833_si_001.cif (15.71 kB)

Silicon Powder: The First Nonmetal Elemental Catalyst for Aminobromination of Olefins with TsNH2 and NBS

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posted on 17.09.2009, 00:00 by Jun-Fa Wei, Zhan-Guo Chen, Wei Lei, Li-Hui Zhang, Ming-Zheng Wang, Xian-Ying Shi, Run-Tao Li
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.