β,β-Disilylated Sulfones as Versatile Building Blocks in Organic Chemistry - A New Sulfonyl Carbanion Transmetalation
作者:Ullrich Jahn、Bertrand Puget
DOI:10.1055/s-0030-1258772
日期:2010.10
1,3-Bis(trimethylsilyl)propyl phenyl sulfone undergoes, in contrast to all reported sulfones bearing α-hydrogen atoms, an initial ortho metalation to an aryllithium at low temperature, which transmetalates quantitatively to the corresponding α-sulfonyl organolithium intermediate. Both organolithiums react selectively with aldehydes to give the corresponding products in good to excellent yields with high selectivity.
1,3-双(trimethylsilyl)丙基苯磺酸酯与所有报告的具有α-氢原子的磺酰胺相比,在低温下经历初步的邻位金属化,形成芳基锂化合物,然后定量转金属化为相应的α-磺酰基有机锂中间体。两种有机锂化合物与醛类选择性反应,生成相应的产物,产率良好到优异,选择性高。