Enantioselective Reduction of Ketones Catalyzed by Rare-Earth Metals Complexed with Phenoxy Modified Chiral Prolinols
作者:Peng Song、Chengrong Lu、Zenghui Fei、Bei Zhao、Yingming Yao
DOI:10.1021/acs.joc.8b00783
日期:2018.6.1
Enantioselective reduction of ketones and α,β-unsaturated ketones by pinacolborane (HBpin) has been well-established by using chiral rare-earth metal catalysts with phenoxy modified prolinols. A number of highly optically active alcohols were obtained from reduction of simple ketones catalyzed by ytterbium complex 1 [L4Yb(L4H)] (H2L4 = (S)-2- tert-butyl-6-((2-(hydroxydiphenylmethyl)pyrrolidin-1-yl)methyl)phenol)
频哪醇硼烷(HBpin)对酮和α,β-不饱和酮的对映选择性还原已通过使用手性稀土金属催化剂与苯氧基改性的脯氨醇进行了很好的建立。reduction配合物1 [L 4 Yb(L 4 H)](H 2 L 4 =(S)-2-叔丁基-6-((2 -(羟基二苯基甲基)吡咯烷-1-基)甲基)苯酚)。此外,α,β-不饱和酮被单组分手性y配合物催化,具有良好的收率,高对映选择性和完全化学选择性,可选择性地还原成多种手性烯丙基醇。2 [L 1 Yb(L 1 H)](H 2 L 1 =(S)-2,4-二叔丁基-6-(((2-(羟基二苯甲基)吡咯烷基-1-基)甲基)苯酚) 。