Development of a New Spiro-BOX Ligand and Its Application in Highly Enantioselective Palladium-Catalyzed Cyclization of 2-Iodoanilines with Allenes
作者:Wei Shu、Qiong Yu、Shengming Ma
DOI:10.1002/adsc.200900607
日期:2009.11
In this communication, we report the synthesis of a new chiral spiro-bisoxazoline ligand, i.e., β-naphthylmethyl-substituted spiro-BOX [(Ra,S,S)-L7] and have successfully applied it to the palladium-catalyzed enantioselective cyclization reaction of simple allenes with o-aminoiodobenzenes, affording highly optically active 3-alkylideneindolines in good yields with excellent enantiomeric excesses.
在此通报中,我们报道了一种新的手性螺-双恶唑啉配体的合成,即β-萘甲基甲基取代的螺-BOX [(R a,S,S)-L7 ]并已成功地将其应用于钯催化的对映选择性简单的烯与邻氨基碘苯的环化反应,可提供高光学活性的3-亚烷基二氢吲哚,收率高,对映体过量极好。