Highly Enantioselective Carbonyl–Ene Reactions of 2,3‐Diketoesters: Efficient and Atom‐Economical Process to Functionalized Chiral α‐Hydroxy‐β‐Ketoesters
作者:Phong M. Truong、Peter Y. Zavalij、Michael P. Doyle
DOI:10.1002/anie.201402233
日期:2014.6.16
Carbonyl–enereactions of 2,3‐diketoesters catalyzed by [Cu(S,S)‐tBu‐box}](SbF6)2 [box=bis(oxazoline)] generate chiralα‐functionalizedα‐hydroxy‐β‐ketoesters in up to 94 % yield and 97 % ee. The 2,3‐diketoesters are conveniently accessed from the corresponding α‐diazo‐β‐ketoester, and a catalyst loading as low as 1.0 mol % can be achieved.