complexes [RuCl2((CH3CH2O)3Si(CH2)3N(CH2PPh2)2)] and SiO2)-O-[RuCl2((CH3CH2O)3Si(CH2)3N(CH2PPh2)2)2] are very active catalysts for the transfer hydrogenation of acetophenone by 2-propanol in basic media. The best yield was observed in hydrogenation of m-methoxy acetophenone (95%) with catalyst [RuCl2((CH3CH2O)3Si(CH2)3N(CH2PPh2)2)].
A Pd–bisphosphine complex and organic functionalities immobilized on the same SiO<sub>2</sub> surface: detailed characterization and its use as an efficient catalyst for allylation
作者:Ken Motokura、Koki Saitoh、Hiroto Noda、Wang-Jae Chun、Akimitsu Miyaji、Sho Yamaguchi、Toshihide Baba
DOI:10.1039/c6cy00593d
日期:——
A Pd–bisphosphine complex and several organic functionalities were immobilized on the same SiO2 surface.
一种Pd-双膦配合物和几种有机官能团被固定在同一SiO2表面上。
Transfer Hydrogenation Reactions Catalyzed by Free or Silica‐Immobilized [RuCl
<sub>2</sub>
(ampy){RN(CH
<sub>2</sub>
PPh
<sub>2</sub>
)
<sub>2</sub>
}] Complexes
作者:Alessandro Del Zotto、Carla Greco、Walter Baratta、Katia Siega、Pierluigi Rigo
DOI:10.1002/ejic.200700044
日期:2007.6
The complexes cis-[RuCl2(ampy)R1N(CH2PPh2)2}] [ampy = (2-aminomethyl)pyridine, R1 = C6H5 or (CH3CH2O)3Si(CH2)3] showed very high catalytic activity in the homogeneous transfer hydrogenation of acetophenone (TOF > 300000 h–1) with the use of 2-propanol as the hydrogen donor and in the presence of sodium isopropoxide. The ligand (CH3CH2O)3Si(CH2)3N(CH2PPh2)2 (ATM) was prepared in high yield by reacting
Co-Immobilization of a Palladium-Bisphosphine Complex and Strong Organic Base on a Silica Surface for Heterogeneous Synergistic Catalysis
作者:Ken Motokura、Koki Saitoh、Hiroto Noda、Yohei Uemura、Wang-Jae Chun、Akimitsu Miyaji、Sho Yamaguchi、Toshihide Baba
DOI:10.1002/cctc.201501178
日期:2016.1
palladium–bisphosphine complex and a strong organic base, 1,4‐diazabicyclo[2.2.2]octane (DABCO), on a silica support was successfully achieved. The new catalyst structure was characterized by X‐ray photoelectron spectroscopy, solid‐state NMR spectroscopy, X‐ray absorption fine structure spectroscopy, and elemental analysis. Although the local structure of the Pd–bisphosphine complex was unaffected by the
media, a series of Pd diphosphine complexes co-immobilized with organic groups onto mesoporous silica (MS) supports was synthesized. The synthesized catalysts were characterized via FT-IR, XAFS, and hydrophobicity determined via contact angle measurements. The newly synthesized catalyst demonstrated improved catalytic allylation performance in water. Aqueous catalytic allylation between allyl methyl