Application of ionic liquids in palladium(II) catalyzed homogenous transfer hydrogenation

Palladium Nanoparticles Supported on Fibrous‐Structured Silica Nanospheres (KCC‐1): An Efficient and Selective Catalyst for the Transfer Hydrogenation of Alkenes

“…Among the available reduction protocols12 catalytic transfer hydrogenation (CTH)13 has emerged as one of the most viable strategies because it does not involve the use of flammable and explosive molecular hydrogen or metal‐hydride donors. Some of the CTH methods for the Pd‐catalyzed chemoselective hydrogenation of olefinic bonds include homogeneous catalysts, such as Pd(OAc) 2 /HCOONH 4 14 and PdCl 2 /HCOOH (microwave) 15. However, heterogeneous catalytic protocols appear more convenient and sustainable because they allow facile product separation and catalyst recycling.…”

Hydrogenation in Ionic Liquids

“…[129][130][131][132][133][134] Catalytic transfer hydrogenations under microwave irradiation were carried out in [bmim] [PF 6 ], using ammonium formate or triethylammonium formate as hydrogen source and 10 % palladium on carbon (3) as catalyst by Berthold et al [129] (Figure 54 Baan et al [130] Cinnamic acid derivatives were hydrogenated by Baan et al [131] (Figure 56) using catalytic transfer hydrogenation (CTH). Using a basic heterogeneous palladium carrier, magnesiumlanthanum mixed oxide (36) and an azeotropic mixture of triethylamine and formic acid and a palladium on magnesium-lanthanum hydrotalcite catalyst, the hydrogenolysis of a variety of para-substituted bromo and chlorobenzenes was performed.…”

Toward green catalytic synthesis—Transition metal-catalyzed reactions in non-conventional media

“…A recent publication by Hermecz and co-workers showed that cinnamic acid and its derivatives could be reduced at the C C bond by Pd(OAc) 2 in [bmim]BF 4 under mild conditions in high yields, using ammonium formate as a hydrogen donor (Scheme 10) [78].…”