Polarized ketene dithioacetals. 28. A new general highly stereoselective and regiospecific method for homologation of ketones to .alpha.,.beta.-unsaturated esters via .alpha.-oxoketene dithioacetals
Iron-catalyzed stereospecific arylation of enol tosylates using Grignard reagents
作者:Yi-Ming Wei、Xiao-Di Ma、Lei Wang、Xin-Fang Duan
DOI:10.1039/c9cc09522e
日期:——
The stereospecific Fe-catalyzed arylation of enol tosylates was reported. Various tri- or tetrasubstituted Z or E-enol tosylates of β-keto esters were arylated using common and Knochel-type Grignard reagents with complete stereofidelity. The precursors for Z/E-zimelidine, tamoxifen and other bioactive compounds were facilely prepared without precious and toxic transition metals.