bis(acetate) complex Ru(CO)2(OAc)2(PnBu3)(PPh3) (OAc = acetate) containing two different trans phosphine ligands, has been employed as pre-catalyst for the chemoselective hydrogenation of α,β-unsaturated ketones to allylic alcohols. Analogous catalytic reactions with the homodiphosphine pre-catalysts Ru(CO)2(OAc)2(PnBu3)2 and Ru(CO)2(OAc)2(PPh3)2 gave lower conversions and selectivities. Batch catalytic reactions
含两个不同反式
膦配体的
钌(II)双(
乙酸)络合物Ru(CO)2(OAc)2(P n Bu 3)(PPh 3)(OAc =
乙酸盐)已被用作该催化剂的预催化剂。 α,β-不饱和酮
化学选择性加氢成烯丙基醇。与均
二膦预催化剂Ru(CO)2(OAc)2(P n Bu 3)2和Ru(CO)2(OAc)2(PPh 3)2的类似催化反应产生较低的转化率和选择性。间歇催化反应和操作高压NMR实验有助于确定CO基团的氢化反应是由双(氢化)双(氢)原位生成的杂
二膦一
氢化物RuH(CO)2(OAc)(P n Bu 3)(PPh 3)进行的OAc)前体。从该一价
氢化物络合物中解开的PPh 3是发生催化活性的必要条件。