Hydrogen Bond Enhanced Enantioselectivity in the Nickel-Catalyzed Transfer Hydrogenation of α-Substituted Acrylic Acid with Formic Acid
作者:Yaxin Sun、Chao Wang、Peng Yang、Jie-Yu Yue、Chang Xu、Jianrong Steve Zhou、Bo Tang
DOI:10.1021/acscatal.3c04187
日期:2023.11.3
asymmetric transfer hydrogenation of α-substituted acrylic acids under mild conditions and avoided the use of high-pressure hydrogen gas was developed. The products included chiral β-amino acids and α-methyl carboxylic acids such as three nonsteroidal anti-inflammatory profens. Deuterium-labeling experiments and DFT studies pointed to an unconventional protonation of a metalacyclopropane complex formed by
开发了一种手性镍配合物,可在温和条件下催化α-取代丙烯酸的不对称转移氢化,并避免使用高压氢气。产品包括手性β-氨基酸和α-甲基羧酸,例如三种非甾体抗炎洛芬。氘标记实验和 DFT 研究表明,由与甲酸形成氢键的 α-苯基丙烯酸形成的金属环丙烷络合物发生了非常规的质子化。当使用HCO 2 D时,氢化镍插入的替代传统途径无法解释 α-苯基丙烯酸的 β 位选择性氘化。