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-catalyzedenantioselectivecyclization reaction of simple allenes with o-aminoiodobenzenes, affording highly optically active 3-alkylideneindolines in good yields with excellent enantiomeric excesses.