29014-71-9

Upstream product

• 110-16-7 maleic acid 
• 71-36-3 butan-1-ol 
• 108-31-6 maleic anhydride 
• 109-65-9 1-bromo-butane 
• 141-32-2 acrylic acid n-butyl ester 
• 24761-88-4 1-butyl diazoacetate 
• 147-73-9 meso-tartaric acid 
• 105-76-0 Dibutyl maleate 
• 110-17-8 (2E)-but-2-enedioic acid 
• 463-49-0 1,2-propanediene 
• 623-91-6 diethyl Fumarate 
• 87-69-4 L-Tartaric acid 
• 61537-83-5 (3-butyloxycarbonyl)acrylic acid 
• 344268-32-2 dibutyl tartrate 

Downstream Products

• 63842-87-5 butoxy-succinic acid dibutyl ester 
• 65817-24-5 3,6-dimethyl-3H-benzo[b]furan-2-one 
• 88592-42-1 2-Morpholino-bernsteinsaeure-dibutylester 
• 1343477-67-7 C₃₂H₃₁IO₄ 
• 6295-06-3 butyl glyoxalate 
• 5144-51-4 di-n-butyl 2-sulfosuccinate sodium salt 

Relevant academic research and scientific papers

Terpenic compounds as renewable sources of raw materials for cross-metathesis

Dihydromyrcenol is used as a hydrated masked form of citronellene in olefin cross-metathesis reactions in order to solve the selectivity problem that results from the presence of two double bonds in many terpenes. Several ruthenium catalysts are evaluated, with the best, M71-SIPr, utilized in the cross-metathesis of dihydromyrcenol with various olefins affording the expected products in good yields. It is shown that the masked double bond can be regenerated via an acid-catalyzed elimination reaction and the product is then subjected to a further cross-metathesis reaction with a second olefin. Georg Thieme Verlag Stuttgart ? New York.

Ruthenium-catalysed oxidative coupling of vinyl derivatives and application in tandem hydrogenation

The first ruthenium-catalyzed oxidative homo- and cross-coupling of exclusive vinyl derivatives giving highly valued 1,3-diene building blocks is reported. The catalytic system is based on readily available reagents and it mainly delivers the E,E isomer. This methodology also enables the synthesis of adipic acid ester derivatives in a one-pot fashion after in situ ruthenium-catalyzed hydrogenation.

Method for preparing maleate by catalyzing maleic anhydride with ionic liquid

The invention discloses a method for preparing maleate by catalyzing maleic anhydride with ionic liquid. The preparation method is characterized by comprising the following steps: mixing ionic liquidwith maleic anhydride and fatty alcohol, carrying out heating to 80-140 DEG C, and performing a reaction for 0.5-4 h to obtain maleate, wherein the usage amount of the ionic liquid accounts for 0.1-10% by mol of the maleic anhydride, and a molar ratio of fatty alcohol to maleic anhydride is 2-12. A high-added-value chemical with the completely-esterified maleate as a main product is prepared in the invention. The method is simple in process, mild in conditions, friendly to environment and high in double esterification degree; and the ionic liquid is high in activity, not prone to inactivationand capable of being cyclically used.

Method for preparing olefin by catalyzing dehydration and deoxidation of polyhydroxy compound with organic molybdenum

The invention discloses a method for preparing olefin by catalyzing dehydration and deoxidation of a polyhydroxy compound with organic molybdenum. The method comprises the following steps: reacting apolyhydroxy compound-containing raw material in the presence of an organic molybdenum-based catalyst to obtain olefin. According to the method, compounds containing nitrogen, sulfur, oxygen, phosphorus and other monodentate and polydentate coordination groups are used as organic ligands, and a series of organic molybdenum catalysts are prepared and used for catalyzing a deoxidation and dehydrationreaction of vicinal diol. The invention provides a cheap non-noble metal molybdenum-based catalyst, wherein the cost is greatly reduced.

Method for preparing succinate by double carbonylation of acetylene

The invention provides a method for preparing succinate by double carbonylation of acetylene. Acetylene, carbon monoxide and an alcohol compound are used as raw materials and subjected to the double carbonylation reaction in a solvent under the catalysis of a catalyst, and the succinate compound is obtained. The catalyst is composed of a palladium compound, a lithium halide/acid auxiliary agent and a nitrogen-oxygen ligand, wherein the nitrogen-oxygen ligand is one or more of 2-hydroxypyridine, 3-hydroxypyridine and 2-picolinic acid, and the dosage of the catalyst is 0.0001-1.0% of the total weight of the reaction system; in the reaction system, the molar ratio of acetylene to the alcohol compound is 1:(2-16), and the molar ratio of the alcohol compound to the solvent is 1:(7-35). According to the method, the succinate compounds can be produced by a one-pot method, wherein the process is simple, and the investment cost of an industrial device is low; the reaction conditions in the production process are mild, the catalytic activity of the catalyst is high, the stability is high, the service life is long, the yield can reach 90% or above, and the higher technical competitive advantage is achieved.

Single-Site Molybdenum Catalyst for the Synthesis of Fumarate

The catalysts with well-defined mononuclear active sites are expected to develop more active catalytic systems for the key chemical transformations. But the rational design of catalyst with stable mononuclear Mo site is still a crucial challenge because of its oligomerization tendency under reaction condition. Herein, Molybdenum catalyst (Mo-8-HQ) with single Mo sites was designed via the pyridine nitrogen and oxygen in hydroxyl of 8-hydroxyquinoline coordinated with Mo atom. The crystal catalyst was stabilized by π-π stacking interaction and hydrogen bonds to form isolated Mo specie. The single-site molybdenum catalyst exhibited excellent catalytic performance in didehydroxylation reactions with high selectively of dibutyl fumarate (86 %) product at mild reaction condition. Deuterium isotopic studies demonstrated that the mechanism feature of didehydroxylation reaction catalyzed by Mo-8-HQ was through concerted cleavage of two C?O bonds process, which could be accelerated by single-site molybdenum catalysts with electron-rich Mo centers.

Diacidic ionic liquid supported on magnetic-silica nanocomposite: a novel, stable, and reusable catalyst for selective diester production

Abstract: Supported diacidic ionic liquid on magnetic silica nanoparticles (SDAIL@magnetic nanoSiO2) was successfully prepared through a multi-step approach. 2,2- bis ((3- methylimidazolidin-1-yl) methyl) propane- 1,3- diol bromide salt was immobilized onto the surface of magnetic silica nanoparticles via covalent bonding to prepare a novel powerful acidic catalyst. The synthesized catalyst was characterized by FT-IR, SEM, TGA, VSM, N2 adsorption–desorption measurements and acid-base titration. The catalytic activity of the prepared SDAIL@magnetic nanoSiO2 was investigated for the selective diesterification of alcohols by phthalic anhydride to afford corresponding dialkyl plasticizers under solvent-free conditions. The nature of two acidic counter anions as well as the presence of Lewis acidic species (Fe3O4) on the magnetic nanosilica and high surface area of the nanosilica influenced the behavior of the catalyst. Surperisingly, the high acidic character of the catalyst facilitates the reaction with a short reaction time. Furthermore, TG analysis strongly demonstrates that major content of IL is still stable on the support up to 290?°C, so catalyst has a good thermal stability. Under the optimized conditions, the conversion of phthalic anhydride was 100% and diester plasticizers were obtained with excellent yields (80–100%). The SDAIL@magnetic nanoSiO2 catalyst showed a good reusability and could be easily separated from the reaction mixture using an external magnet thanks to its superparamagnetic behavior and reused for several runs without significant activity loss. An important advantage of the SDAIL@magnetic nanoSiO2 was its high-hydrophilicity resulted in excellent selectivity towards the formation of only diesters which are commonly used plasticizers in different industries. Graphical abstract [Figure not available: see fulltext.].

Synthesis and characterization of a new hydroxyl functionalized diacidic ionic liquid as catalyst for the preparation of diester plasticizers

Two new functionalized diacidic ionic liquids (FDAILs) including hydroxyl functionalized diacidic ionic liquid (HFDAIL) and sulfonated diacidic ionic liquid (SFDAIL) were synthesized and characterized by 1HNMR, 13CNMR and FT-IR. The catalytic activities of these FDAILs were examined in esterification reaction of anhydrides with some alcohols to give corresponding dialkyl plasticizers under solvent-free conditions. The results indicate that HFDAIL, as hydroxyl-bearing catalyst, show better catalytic performance. Under the optimum conditions, using HFDAIL, the conversion of phthalic anhydride was high and diester plasticizers were obtained with good to excellent yields in the presence of only 10?mol% of ionic liquid. All the produced diesters could be easily recovered due to their immiscibility with the ionic liquid. Recycling experiments suggests that these ionic liquids can be reused several times without remarkable loss in their catalytic activity.

Photoorganocatalytic synthesis of lactones: Via a selective C-H activation-alkylation of alcohols

Selective C-H activation is an area of growing importance in modern organic chemistry. Herein, we report our efforts in combining organocatalysis and photocatalysis for the development of a highly efficient and selective visible-light mediated protocol for the C-H activation and addition of various alcohols to a plethora of Michael acceptors, followed by a cyclization reaction leading to lactones, a repeatedly occurring motif in nature. Utilizing phenylglyoxylic acid as the photocatalyst and common household bulbs as the light source, we describe a versatile α-alkylation/lactonization of alcohols with α,β-unsaturated esters leading to products in excellent yields. The reaction mechanism was extensively studied.

Esterification of maleic acid and butanol using cationic exchange resin as catalyst

Abstract : Dibutyl maleate is a perfumery ester used as an intermediate in the production of paints, adhesives, and copolymers. Esterification of maleic acid and butanol was studied in presence of acidic cation exchange resin as a catalyst. The objective of this work was to test the suitability and efficacy of heterogeneous catalysts such as Indion 225H and Amberlyst-15 in the synthesis of dibutyl maleate. Various parameters deciding the conversion of reaction such as mole ratio, catalyst loading, molecular sieves, speed of agitation and effect of temperature were optimized for the maximum rate and conversion. The activation energy was calculated as 71.5?kcal/mol. Diffusivity value D AB (maleic acid in n-butanol) at 80°C was calculated as 5.08×10-10m2/s and effective diffusivity (D e-A) was calculated as 5.08×10-11m2/s. Solid–liquid mass transfer coefficient (k sl-A) was calculated as 6.77×10-6m/s for the particle size of Amberlyst-15 as 0.5 mm. Graphical Abstract: Synopsis. Synthesis of dibutyl maleate was carried out using ion exchange resin as a catalyst. Effect of various parameters on the conversion of reaction like mole ratio, catalyst loading, molecular sieves, the speed of agitation and effect of temperature was studied. [Figure not available: see fulltext.].