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inhibits 5-aminolevulinic acid dehydratase

In particular, 5-hydroxylevulinic acid (5-HLA) synthesized via bromination and hydrolysis of levulinic acid has been used as the monomer for the preparation of poly(5-hydroxylevulinic acid) by direct poly-condensation using SnCl 2 ·2H 2 O as the catalyst [11] .

T1 - Synthesis of ethyl levulinate from levulinic acid over solid super acid catalyst

In another example of using 5-hydroxylevulinic acid, a biodegradable polymer poly(5-hydroxylevulinic acid- co - l -lactic acid) was synthesized via melt copolycondensation of 5-HLA and l -lactic acid [12] .

Synthesis of levulinic acid from fructose using …

Several of these levulinic acid derivatives have been used as building blocks for the preparation of polymers.

ar ti c l e i nf o ab stra ct Article history: A simple and effective route for the production of levulinic acid (LA) from cellulose has been developed in Received 13 April 2015 SO H-functionalized ionic liquids.

This five carbon keto acid is a versatile building block for the synthesis of various organic chemicals such as levulinate esters, γ-valerolactone, acrylic acid, 1,4-pentanediol, β-acetylacrylic acid, α-angelica lactone, 2-methyl THF, and δ-amino levulinic acid.

Synthesis and Purification of Levulinic Acid by …

73-84 (1999).Data concerning the methods of synthesis, chemical transformations andapplication of levulinic acid are analysed and generalised.

The high efficiency and high selectivity for separating levulinic acid can be achieved by using extraction separation technique based on reversible chemical complexation under the following conditions: 99∶ 1 volumetric ratio of N-butyl alcohol and trioctylamine and 99.

The widesynthetic potential of levulinic acid, particularly as a key compound inthe synthesis of various heterocyclic systems, saturated and unsaturatedketones and diketones, difficultly accessible acids and other compoundsis demonstrated.

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Synthesis of levulinic acid–glycerol ketal–ester oligomers …

In this study, 40 % H3PW12O40/ZrO2 catalyst was synthesized, characterized and tested for conversion of levulinic acid (LA) and ethanol (EtOH) to ethyl levulinate (EL). The catalyst was prepared through wetimpregnation method. Catalyst characterization using BET and NH3-TPD revealed that the catalytic performance was dominantly influenced by the acid sites and surface area of the catalyst. The perfomance of the catalyst was tested based on reaction time (30 min to 4 h) and reaction temperature (120 °C to 160 °C) with 1:5 levulinic acid to ethanol ratio. The 40 % H3PW12O40/ZrO2 catalyst exhibited high catalytic performance at 150 °C with time taken 3 h for 99 % yield of ethyl levulinate.

Synthesis of levulinic acid from fructose using Amberlyst …

N2 - In this study, 40 % H3PW12O40/ZrO2 catalyst was synthesized, characterized and tested for conversion of levulinic acid (LA) and ethanol (EtOH) to ethyl levulinate (EL). The catalyst was prepared through wetimpregnation method. Catalyst characterization using BET and NH3-TPD revealed that the catalytic performance was dominantly influenced by the acid sites and surface area of the catalyst. The perfomance of the catalyst was tested based on reaction time (30 min to 4 h) and reaction temperature (120 °C to 160 °C) with 1:5 levulinic acid to ethanol ratio. The 40 % H3PW12O40/ZrO2 catalyst exhibited high catalytic performance at 150 °C with time taken 3 h for 99 % yield of ethyl levulinate.

Levulinic acid in organic synthesis - IOPscience

AB - In this study, 40 % H3PW12O40/ZrO2 catalyst was synthesized, characterized and tested for conversion of levulinic acid (LA) and ethanol (EtOH) to ethyl levulinate (EL). The catalyst was prepared through wetimpregnation method. Catalyst characterization using BET and NH3-TPD revealed that the catalytic performance was dominantly influenced by the acid sites and surface area of the catalyst. The perfomance of the catalyst was tested based on reaction time (30 min to 4 h) and reaction temperature (120 °C to 160 °C) with 1:5 levulinic acid to ethanol ratio. The 40 % H3PW12O40/ZrO2 catalyst exhibited high catalytic performance at 150 °C with time taken 3 h for 99 % yield of ethyl levulinate.

FR2640263A1 - Preparation of levulinic acid - Google …

Levulinic acid is another biomass derived compound that has attracted attention, and can be prepared by acid catalyzed dehydration of hexoses as well as from a verity of abundant lignocellulosic biomass raw materials [9,10] .

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