Benzo[
<i>h</i>
]quinoline Pincer Ruthenium and Osmium Catalysts for Hydrogenation of Ketones
作者:Walter Baratta、Lidia Fanfoni、Santo Magnolia、Katia Siega、Pierluigi Rigo
DOI:10.1002/ejic.200901253
日期:2010.3
Chiral orthometalated osmium complexes [OsCl(CN'N)(PP)] (PP = (S,R)-Josiphos type diphosphane) based on 2-amino-methylbenzo[h]quinoline ligands (HCN'N) were prepared by reaction of [OsCl 2 (PPh 3 ) 3 ] with a Josiphos diphosphane and a HCN'N ligand in the presence of NEt 3 . Ruthenium and osmium complexes [MX(CN'N)(PP)] (M = Ru, Os; X = Cl, OCH(p-C 6 H 4 F) 2 ; PP = dppb, (S,R)-Josiphos}, in the presence
基于 2-氨基-甲基苯并 [h] 喹啉配体 (HCN'N) 的手性正金属化锇配合物 [OsCl(CN'N)(PP)] (PP = (S,R)-Josiphos type diphosphane) [OsCl 2 (PPh 3 ) 3 ]在NEt 3 存在下具有Josiphos diphosphane和HCN'N配体。钌和锇配合物 [MX(CN'N)(PP)] (M = Ru, Os; X = Cl, OCH(pC 6 H 4 F) 2 ; PP = dppb, (S,R)-Josiphos},在当使用 10000-50000 的 S/C 比时,KOtBu 的存在有效地催化芳香族和脂肪族酮在甲醇或甲醇/乙醇混合物中化学选择性氢化(H 2 = 5 atm)为仲醇。使用这些手性膦、烷基芳基酮已被还原,ee 值高达 99%,周转频率 (TOF) 高达 5.6×10 4 h -1 。