Diphosphino-Functionalized MCM-41-Immobilized Rhodium Complex: A Highly Efficient and Recyclable Catalyst for the Hydrophosphinylation of Terminal Alkynes

Abstract

Diphosphino-functionalized MCM-41-immobilized rhodium complex (MCM-41-2P-RhCl 3 ) was conveniently synthesized from commercially available and cheap c-aminopropyltriethoxysilane via immobilization on mesoporous MCM-41, followed by reacting with diphenylphosphinomethanol and rhodium chloride. It was found that this heterogeneous rhodium complex is a highly efficient catalyst for the hydrophosphinylation of terminal alkynes with diphenylphosphine oxide and can be recovered and recycled by a simple filtration of the reaction solution and used for at least 10 consecutive trials without any decreases in activity.

Heterogeneous Catalytic Method for the Copper(II)-Catalysed Addition of H-Phosphinates and Secondary Phosphine Oxides to Phenylacetylene

“…The synthesis of alkenylphosphine oxides usually requires the presence of a transition metal in form of transition metal salts, complexes or the immobilized metals on some kind of support [17][18][19][20][21][22][23]. The transition metals most frequently used for the hydrophosphinylation are copper [24][25][26][27], nickel [28,29], palladium [20,[30][31][32] and rhodium [19-21, 33, 34].…”

Ion current behaviors of mesoporous zeolite–polymer composite nanochannels prepared by water-assisted self-assembly

“…Mesoporous silicates are widely used for a variety of applications such as gas storage, 15 heterogeneous catalysis, 16,17 and drug delivery, 18,19 e.g. mesoporous zeolite (MCM-41) has been the most popular member of mesoporous silicate materials since its discovery in 1992.…”