A Bidentate Ru(II)-NC Complex as a Catalyst for Semihydrogenation of Alkynes to ( E )-Alkenes with Ethanol

作者：Dawei Gong, Bowen Hu, Weiwei Yang, Degong Kong, Haiping Xia, Dafa Chen · 发表于：Organometallics · 年份：2020 · DOI：10.1021/acs.organomet.0c00074 · 被引用次数：32 · 研究领域：Asymmetric Hydrogenation and Catalysis、Carbon dioxide utilization in catalysis、Metal-Organic Frameworks: Synthesis and Applications

Four Ru(II)-NC complexes were tested as catalysts for semihydrogenation of internal alkynes to ( E )-alkenes with ethanol, and the complex {(C 5 H 4 N)(C 6 H 4 )}RuCl(CO)(PPh 3 ) 2 ( 1a ) showed the highest activity. The reactions proceeded well with 1 mol % catalyst loading and 0.1 equiv of t -BuONa at 110 °C for 1 h, and 32 alkenes were synthesized with excellent E: Z selectivity. This is the first ruthenium-catalyzed semihydrogenation of internal alkynes to ( E )-alkenes using ethanol as the hydrogen donor.