A new methodology for the catalytic enantioselective reduction of α-alkoxy-ketones is described. The procedure employes Zn(OTf)2–bis-oxazoline complexes (8–10 mol%) as catalysts and catecholborane as the reducing agent. The reaction, carried out in CH2Cl2 at 0°C, affords the α-alkoxy-alcohols in high yields and with good enantioselectivity.
描述了催化α-烷氧基-酮的对映选择性还原的新方法。该方法使用Zn(OTf)2-双-
恶唑啉配合物(8-10 mol%)作为催化剂,
儿茶酚硼烷作为还原剂。该反应在0℃下在CH 2 Cl 2中进行,以高收率和良好的对映选择性提供了α-烷氧基醇。