Recent Advances in the Deoxydehydration of Vicinal Diols and Polyols

Abstract

Deoxydehydration (DODH) is one of the most promising tools to reduce the oxygen content of biomass (sugars and polyols) and provide analogues of platform chemicals that are derived from fossil resources.T his reaction converts avicinal diol into an alkene and is typically catalyzed by high-oxidation-state metal-oxo compounds in the presence of as toichiometricr eductant, with examples of both homogeneous and heterogeneous systems. This minireview will highlight the developments in this field over the past 5y ears and focus on efforts to solve the problems that currently prevent DODH being performed on ac ommercial scale, including the nature of the reductant,s ubstrate scope and selectivity,and catalyst recovery and expense.

Deoxydehydration of Biomass‐Derived Polyols Over Silver‐Modified Ceria‐Supported Rhenium Catalyst with Molecular Hydrogen

“…In the field of biorefinery, removal of the oxygen atom in biomass is of great importance because of the higher oxygen content of biomass‐derived platform chemicals such as sugar derivatives than chemicals widely used in industry [7–15] . Deoxydehydration (DODH) reaction, which converts vicinal diols to olefins in one step, is a useful method for oxygen removal because of the regioselectivity for cis ‐vicinal diols and the versatility of product olefins [16–19] . A typical DODH reaction is the production of 1,3‐butadiene from erythritol, which is a C 4 sugar alcohol that can be produced from sugars or glycerol in large scale by fermentation [20] .…”

C(sp3)−C(sp3) bond formation via nickel-catalyzed deoxygenative homo-coupling of aldehydes/ketones mediated by hydrazine

“…Biomass, as a renewable resource, has the potential to provide earth rich and readily available carbon-based raw materials for chemical industry 3 . Although both biomass and fossil oil are carbon-based natural resources, their compositions are very different: while fossil feedstocks consist primarily of carbon and hydrogen, the oxygen content in biomass resources is very high mostly in the form of carbonyl or hydroxyl groups, which lead to complications and great challenges in the direct substitution of fossil resources with bio-based ones 4 – 6 . Therefore, the efficient transformation of these oxygen-containing compounds, especially the direct deoxygenation of aldehydes or ketones, could potentially provide an enabling tool for future biorefinery concepts.…”

Direct Deoxydehydration of Cyclic trans‐Diol Substrates: An Experimental and Computational Study of the Reaction Mechanism of Vanadium(V)‐based Catalysis**

“…With the rapid depletion of fossil fuel resources, there is an urgency to leverage biomass for high value chemicals as a replacement for petrochemical-based products, from fuels, dispersants and detergents, to rheology modifiers and flocculants. 1 Carbohydrates such as cellulose and starch constitute the largest source of biomass substrate. However, the synthesis and selective modification of saccharides is challenging.…”