Chiral Phosphoric Acid Catalyzed Asymmetric Ugi Reaction by Dynamic Kinetic Resolution of the Primary Multicomponent Adduct
作者:Yun Zhang、Yu-Fei Ao、Zhi-Tang Huang、De-Xian Wang、Mei-Xiang Wang、Jieping Zhu
DOI:10.1002/anie.201600751
日期:2016.4.18
Reaction of isonitriles with 3‐(arylamino)isobenzofuran‐1(3H)‐ones in the presence of a catalytic amount of an octahydro (R)‐binol‐derived chiral phosphoric acid afforded 3‐oxo‐2‐arylisoindoline‐1‐carboxamides in high yields with good to high enantioselectivities. An enantioselective Ugi four‐center three‐component reaction of 2‐formylbenzoic acids, anilines, and isonitriles was subsequently developed
在催化量的八氢(R)-苯酚衍生的手性磷酸存在下,异腈与3-(芳基氨基)异苯并呋喃-1(3 H)-酮反应,得到3-氧代-2-芳基异吲哚啉-1-羧酰胺高收率,对映选择性好。随后开发了2-甲酰基苯甲酸,苯胺和异腈的对映选择性Ugi四中心三组分反应,用于合成相同的杂环。机理研究表明,对映选择性是由主要的Ugi加合物的动态动力学拆分引起的,而不是由C-C键形成过程引起的。所得的杂环产物具有重要的医学重要性。