Solvent-Dependent Chemoselectivities in Additions of β-Carbonyl Imines to Allyltrimethylsilane with CTAN
作者:Yang Zhang、Andrew J. Raines、Robert A. Flowers
DOI:10.1021/jo048955d
日期:2004.9.1
The oxidative coupling of beta-carbonyl imines and allyltrimethylsilane with CTAN were investigated in CH3CN and CH2Cl2. In CH3CN allylation products were obtained predominantly, while in CH2Cl2, dihydropyrrole products were obtained exclusively. Solvent-assisted nucleophilic cleavage of the intermediate beta-silyl cation is proposed to play a role in the solvent-dependent chemoselectivity.