Synthesis and Characterization of Nickel(II) Homogeneous and Supported Complexes for the Hydrogenation of Furfural to Furfuryl Alcohol

Nickel(II) complexes have been synthesized and characterized using nuclear magnetic resonance (NMR), infrared spectroscopy, high resolution mass spectroscopy, and elemental analysis. The complexes were evaluated as pre-catalysts in the direct hydrogenation of furfural to furfuryl alcohol. The pre-catalysts C1 and C4 gave higher furfural conversion (97% and 96%, respectively), as a result, they were also evaluated in the transfer hydrogenation of furfural using formic acid as the hydrogen source where higher furfural conversion (93%) was obtained and selectivity (100%) toward the formation of furfuryl alcohol at 4 h. The catalyst C1 was recycled three times with and it was observed that the catalytic activity might be due to a mixture of both molecular catalysis and nanoparticles, as evidenced by the decrease in activity in mercury poisoning experiments. The hydrogenation reactions were also extended to alpha-β unsaturated substrates and were selective toward saturation of the carbonyl functionality over alkene groups.

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Synthesis and characterization of a porphyrin-crown ether conjugate as a potential intermediate for drug delivery application

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424620500546 ◽

2020 ◽

pp. A-G

Author(s):

Maher Fathalla

Keyword(s):

Mass Spectrometry ◽

Drug Delivery ◽

High Resolution Mass Spectrometry ◽

Mesoporous Silica Nanoparticles ◽

Synthesis And Characterization ◽

Delivery Vehicle ◽

Potential Applications ◽

Resolution Mass ◽

C Nmr

The development of synthetic strategies for functional building units plays a central role in supramolecular chemistry. Both porphyrin and crown ethers have attracted the attention of researchers worldwide owing to their unique properties. It is envisioned that the integration of the two molecules will result in hybrid materials with potential applications in many fields. In the present study, a new porphyrin derivative 3 appended with four 18-crown-6 (18C6) ether moieties was synthesized through the Suzuki-Miyaura coupling of boronic ester porphyrin 1 and 4-bromobenzo-18-crown-6 2 in 80% yield. Porphyrin 3 was fully characterized by 1H/[Formula: see text]C NMR spectroscopy and high resolution mass spectrometry. The tendency of the 18C6 to form host-guest complexes with ammonium cations was exploited to assemble cation responsive hybrid material of porphyrin 3 and ammonium immobilized mesoporous silica nanoparticles (MSNs). Furthermore, the potential application of the 3/MSNs conjugate as a cation-responsive drug delivery vehicle was investigated in solution by UV-vis and fluorescence spectroscopies.

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ChemInform Abstract: Synthesis and Characterization of Rhodium(I) Complexes with P-N Donor Ligands and Their Catalytic Application in Transfer Hydrogenation of Carbonyl Group.

ChemInform ◽

10.1002/chin.201535084 ◽

2015 ◽

Vol 46 (35) ◽

pp. no-no

Author(s):

Geetika Borah ◽

Podma Pollov Sarmah ◽

Devajani Boruah

Keyword(s):

Carbonyl Group ◽

Transfer Hydrogenation ◽

Donor Ligands ◽

Synthesis And Characterization ◽

Catalytic Application

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Tandem dehydration–transfer hydrogenation reactions of xylose to furfuryl alcohol over zeolite catalysts

Green Chemistry ◽

10.1039/c7gc01288h ◽

2017 ◽

Vol 19 (16) ◽

pp. 3759-3763 ◽

Cited By ~ 15

Author(s):

Priscilla N. Paulino ◽

Rafael F. Perez ◽

Natália G. Figueiredo ◽

Marco A. Fraga

Keyword(s):

Furfuryl Alcohol ◽

Zeolite Catalysts ◽

Transfer Hydrogenation ◽

Tandem Reactions ◽

Hydrogenation Reactions

Dehydration and transfer hydrogenation tandem reactions of xylose to furfuryl alcohol in water/isopropanol were performed on MFI, FAU and BEA zeolites.

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