Highly Enantioselective Alkenylation of Cyclic α,β-Unsaturated Carbonyl Compounds as Catalyzed by a Rhodium-Diene Complex: Application to the Synthesis of (<i>S</i>)-Pregabalin and (−)-α-Kainic Acid
作者:Hong-Jie Yu、Cheng Shao、Zhe Cui、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1002/chem.201202660
日期:2012.10.15
Rhod to addition: An efficient asymmetric conjugate‐addition reaction of alkenyltrifluoroborates and α,β‐unsaturated carbonyl compounds, as catalyzed by a rhodium–diene complex, was developed. The products were obtained in high yield and high levels of enantioselectivity. The methodology was applied to a concise synthesis of (S)‐pregabalin and (−)‐α‐kainic acid (see scheme).
加成铑:开发了由铑-二烯络合物催化的烯基三氟硼酸酯与α,β-不饱和羰基化合物的有效不对称共轭加成反应。以高收率和高水平的对映选择性获得产物。该方法已用于简明合成(S)-普瑞巴林和(-)- α-海藻酸(参见方案)。