Enantioselective Alkylations of Tributyltin Enolates Catalyzed by Cr(salen)Cl: Access to Enantiomerically Enriched All-Carbon Quaternary Centers
作者:Abigail G. Doyle、Eric N. Jacobsen
DOI:10.1021/ja043601p
日期:2005.1.1
The catalytic asymmetric alpha-alkylation of tributyltin enolates with a range of primary alkyl halides is catalyzed by a chiral Cr(salen) complex. The reaction constitutes the first transition-metal-catalyzed system for alpha-alkylation of carbonyl substrates with this important class of electrophiles, providing access to five-, six-, and seven-membered ring ketone products bearing alpha-quaternary
三丁基锡烯醇化物与一系列伯烷基卤化物的催化不对称 α-烷基化由手性 Cr(salen) 配合物催化。该反应构成了第一个使用此类重要亲电试剂对羰基底物进行 α-烷基化的过渡金属催化系统,提供了获得具有高对映选择性和 α-季立体中心的五、六和七元环酮产物的途径。综合有用的产量。