Ahmed M. Senan
Assistant Professor,Food science and technology, Najing Agricultural University, Nanjing210095 China
Title: Non-redox metal ions promoted isomerization and oxidation of unsaturated hydrocarbons by palladium (II) catalyst
Biography
Biography: Ahmed M. Senan
Abstract
The palladium plays a crucial role in organic synthesis and procedures including oxidation and isomerization reactions. Here, the review introduces catalytic transformation of biomass to renewable chemical materials by catalytic reactions as various olefins and natural oils. Several strategies have evolved for non-redox metal ions promoted Pd(II) catalysis activity of olefins isomerization, methyl linoleate isomerization and fatty acids oxidation reactions. In this review: firstly, we illustrate that the nonredox metal ions accelerate Pd(II)-catalyzed olefin isomerization with Highly efficiency, while Pd(II) alone is very sluggish. Density functional theory (DFT) calculations further confirmed the sharp decrease of the energy barrier in C−H activation by the heterobimetallic Pd(II)/Al(III) species. In addition, this work described the transesterformations of methyl linoleate as biomass to its conjugated derivatives. It was found that using non-redox metal ions like Sc(III) to Pd(OAc)2 catalyst can sharply improve the efficiency Pd(II) catalyzed methyl linoleate to its conjugated deviates in mixture solvent at 110℃. Finally, the modification Wacker-type oxidation for vegetable oils to corresponding Keto Fatty Acids/Esters (FAMEs) with Pd(II)/Lewis Acid in acetonitrile mixture with water as a solvent. Strong Lewis acids like Sc(OTf)3 as non-redox metal ions was using with sample of Pd(OAc)2 under aerobic conditions and, it generated the Sc(III)…H-Pd(II) complex that consequently hold the key active species for Wacker-type oxidation.