Ruthenium nanoparticle-intercalated montmorillonite clay for solvent-free alkene hydrogenation reaction

Abstract

Well characterized ruthenium nanoparticles intercalated montmorillonite clay was used as a catalyst for solvent free alkene hydrogenation reaction and the corresponding products were obtained in good yield. The catalytic activity of ruthenium nanoparticles intercalated montmorillonite clay was successfully tested for 16 different functionalized and non-functionalized alkenes. Apart from alkene reduction, the ruthenium nanoparticles intercalated montmorillonite clay was also applied for Wittig-type reaction for obtain dehydrobrittonin A, an important intermediate for the syntheses of brittonin A. Ruthenium nanoparticles intercalated montmorillonite clay was found active for the synthesis of dehydrobrittonin A and brittonin A. 9 times catalyst recycling, low catalyst loading, high catalytic activity and catalytic selectivity were the noteworthy outcomes of the proposed protocol.

Recyclable Supramolecular Ruthenium Catalyst for the Selective Aerobic Oxidation of Alcohols on Water: Application to Total Synthesis of Brittonin A

“…truncatifolia (F. F. muscicola) caught our attention. A literature survey revealed that the recent syntheses of the same uses Ru nps relying on hydrogenation reactions under high pressure conditions . The other report by Alonso et al used organic solvents and other pyrophoric reactants .…”

“…A literature survey revealed that the recent syntheses of the same uses Ru nps relying on hydrogenation reactions under high pressure conditions. 121 The other report by Alonso et al used organic solvents and other pyrophoric reactants. 83 The recent synthesis of Batatasin III and other analogues also relies on Wittig and olefin reduction in flammable solvents.…”

Solvent-free selective hydrogenation of o -chloronitrobenzene to o -chloroaniline over alumina supported Pt nanoparticles

“…Therefore, researchers have been working on solvent-free conditions for both the laboratory synthesis and the industrial manufacturing [1,2]. Some recent works on this direction include the Hantzsch reaction [3], the alkene hydrogenation reaction [4], the alcohol and aldehyde oxidation over Au/MgO [5], and the alkylation of amines with alcohols over organo-iridium catalysts [6].…”

Sodium borohydride-nickel chloride hexahydrate in EtOH/PEG-400 as an efficient and recyclable catalytic system for the reduction of alkenes

“…These catalytic systems include NaBH 4 /NiCl 2 $6H 2 O/moist alumina in hexane, 12 InCl 3 -NaBH 4 reagent system, 13 NaBH 4 /RuCl 3 under aqueous conditions, 14 NaBH 4 /CH 3 COOH in the presence of Pd/C 15 and NaBH 4 -RANEY® nickel system in water. 16 Nevertheless, most of these systems require costly transition metal catalyst, long reaction time and a large excess of NaBH 4 . In addition to this, little has been done to recycle the catalyst for the reduction of alkenes using NaBH 4 .…”

“…25 The activity of the in situ generated Ni (0) NPs catalyst in EtOH/PEG-400 (3/2 ratio) had also been compared with the commercial RANEY® nickel catalyst. The results revealed that the in situ generated Ni (0) NPs exhibited a higher activity for the reduction of styrene (entries 4,20). Thus, we can conclude that the EtOH/ PEG-400 using NiCl 2 $6H 2 O-NaBH 4 is a very simple and efficient system for the reduction of styrene.…”