Acceptorless and Base-free Dehydrogenation of Cyanohydrin with (η<sup>6</sup>
-Arene)halide(Bidentate Phosphine)ruthenium(II) Complex
作者:Kicheol Kim、Adhitya Mangala Putra Moeljadi、Hajime Hirao、Soon Hyeok Hong
DOI:10.1002/adsc.201700786
日期:2017.10.4
Ruthenium‐catalyzed dehydrogenation of cyanohydrins under acceptorless and base‐free conditions was demonstrated for the first time in the synthesis of acyl cyanide. As opposed to the thermodynamically preferred elimination of hydrogen cyanide, the dehydrogenation of cyanohydrins could be kinetically controlled with ruthenium (II) bidentate phosphine complexes. The effects of the arene, phosphine ligands
在酰基氰化物的合成中首次证明了钌在无受体和无碱条件下对氰醇的脱氢作用。与热力学上优选的氰化氢消除相反,氰醇的脱氢可以用钌(II)二齿膦配合物动力学控制。关于催化活性和选择性,研究了芳烃,膦配体和抗衡阴离子的作用。通过用实验观察到的[(alkoxide)Ru]络合物消除β-氢化物可以发生选择性脱氢。