Development of Chiral Spiro P-N-S Ligands for Iridium-Catalyzed Asymmetric Hydrogenation of β-Alkyl-β-Ketoesters
作者:Deng-Hui Bao、Hui-Ling Wu、Chao-Lun Liu、Jian-Hua Xie、Qi-Lin Zhou
DOI:10.1002/anie.201502860
日期:2015.7.20
The chiral tridentate spiro P‐N‐S ligands (SpiroSAP) were developed, and their iridium complexes were prepared. Introduction of a 1,3‐dithiane moiety into the ligand resulted in a highly efficient chiral iridium catalyst for asymmetric hydrogenation of β‐alkyl‐β‐ketoesters, producing chiral β‐alkyl‐β‐hydroxyesters with excellent enantioselectivities (95–99.9 % ee) and turnover numbers of up to 355 000
研发了手性三齿螺旋螺-N‐S配体(SpiroSAP),并制备了其铱配合物。在配体中引入1,3-二硫杂环丁烷部分产生了高效的手性铱催化剂,用于β-烷基-β-酮酸酯的不对称加氢,生成具有出色对映选择性(95-99.9%ee的手性β-烷基-β-羟基酯)),营业额高达355 000。