5433-04-5

Upstream product

• 67-56-1 methanol 
• 201230-82-2 carbon monoxide 
• 1943-87-9 methyl N-(4-nitrophenyl)carbamate 
• 589-87-7 1,4-bromoiodobenzene 
• 5183-78-8 methyl(phenylsulfonyl)amide 
• 598-55-0 methyl carbamate 
• 100-25-4 para-dinitrobenzene 
• 2597-44-6 formyl radical 
• 106-50-3 1,4-phenylenediamine 
• 100-01-6 4-nitro-aniline 
• 61-90-5 L-leucine 
• 104-49-4 1,4-diisocyanatobenzene 
• 497-25-6 dimethylenecyclourethane 
• 79-22-1 methyl chloroformate 

Downstream Products

• 147220-76-6 N,N'-(nitro-p-phenylene)-bis-carbamic acid dimethyl ester 
• 107590-79-4 2-(1-naphthylamino)-1,4-di(methoxycarbamoyl)benzene 
• 107590-78-3 2-phenylamino-1,4-di(methoxycarbamoyl)benzene 
• 107590-77-2 1,4-di(methoxycarbamoyl)-2-chlorobenzene 
• 104-49-4 1,4-diisocyanatobenzene 
• 107590-76-1 N,N'-bis(methoxycarbonyl)-1,4-benzoquinone diimine 

Relevant academic research and scientific papers

CuSe2/CeO2 as a novel heterogeneous catalyst for reductive carbonylation of nitroarenes for generating urethanes

The reaction of CuCl2, SeO2, and cetyltrimethylammonium bromide (CTAB) under the CO pressure in methanol produce a black solid, which is identified as cupric diselenide, CuIISe2 using various spectroscopic analyses. Impregnation of 5 wt% of CuSe2 onto CeO2 resulted in much more enhanced catalytic activity due to the uniform and highly dispersed particle. The reductive carbonylation of nitrobenzene (NB) as a model substrate has been examined in the presence of the CuSe2/CeO2 as a single component heterogeneous catalyst, which is found to exhibit excellent catalytic activity for generating methyl-N-phenyl carbamate (MPC) in a highly selective fashion. The effects of various reaction parameters such as temperature, pressure, and reaction time have been investigated. A plausible reaction mechanism using this cheap heterogeneous catalyst is also presented, especially invoking the importance of CuSe2(μ-CO) species.

Method for preparing methyl carbamate by catalyzing methanol conversion

The invention discloses a method for preparing methyl carbamate by catalyzing methanol conversion. The method specifically comprises: taking oxygen or air as an oxygen source, taking organic amine as a nitrogen source, taking methanol as a solvent, in the function of a catalyst, allowing methanol to undergo ammoxidation to generate methanamide, and allowing methanamide to undergo in-situ oxidation esterification to obtain methyl carbamate. The method is high in raw material utilization rate. The catalyst is cheap and available, is easy to recycle, can be reused, and is easy to separate from the product. The obtained methyl carbamate is excellent in performance and high in purity. The technical route is of great significance in releasing excess production capacity of methanol and reducing the dependence on highly toxic chemicals.

Synthesis and UV/Vis analysis of amino acid-derived bisurea-type receptors involving anion complexation

Sixteen new bisurea compounds incorporating versatile proteinogenic amino acids as well as nipecotic acid have been synthesized via addition reaction to aryl diisocyanates. The products were analytically characterized and their ability for anion recognition was studied by UV/Vis spectroscopy. In the presence of fluoride, acetate or dihydrogenphosphate ions, hyperchromic and bathochromic peak shifts were determined. By way of contrast, bromide, iodide, or hydrogensulfate ions cause no significant change of absorbance. The special effect of heterocyclic derivatives was explained by molecular modeling calculations. In addition, the crystal structure of the byproduct dimethyl N,N′-(1,4-phenylene)dicarbamate is discussed.

Efficient palladium/1,10-phenanthroline-catalyzed reductive carbonylation of mono- and dinitroarenes to urethanes in phosphonium salt ionic liquids

(Chemical Equation Presented) The highly reactive and selective reductive carbonylation of mono- and dinitroarenes to the corresponding mono- and diurethanes was carried out in the presence of a PdCl2/Phen catalytic system, using PSIL110[C14H29(C6H 13)3P+PF6-] as the ionic liquid under mild reaction conditions. No cocatalyst is required.

UFU ('Ullmann-Finkelstein-Ullmann'): a new multicomponent reaction

We developed conditions to carry out the first 'one-pot' Ullmann-Finkelstein-Ullmann multicomponent reaction reported. This reaction allows the one-pot synthesis of dissymmetrical para-disubstituted benzene scaffold from 1-bromo-4-iodobenzene and two N-nu

Reductive carbonylation of aromatic dinitro compounds with a palladium(phenanthroline)2(triflate)2 catalyst and an aromatic carboxylic acid as cocatalyst

Reductive carbonylation of aromatic dinitro compounds to afford valuable dicarbamates proceeds at reasonable rates and with high selectivities under the influence of a Pd(phenanthroline)2(triflate)2 catalyst in combination with an aromatic carboxylic acid as cocatalyst.

Palladium Complex-Potassium Carbonate-catalysed Reductive Carbonylation of Mono- and Di-nitroaromatic Compounds

Mono- and di-nitroaromatic compounds react with carbon monoxide in benzene containing methanol, with catalytic quantities of 1,3-bis(diphenylphosphino)propanepalladium dichloride and potassium carbonate as the base, to give urethanes in reasonable yields.

A New Method for a Kinetic Study of Reactions between Di-isocyanates and Alcohols. Part 1. Symmetrical Di-isocyanates

A new method of following the kinetics of the uncatalysed reaction between di-isocyanates and alcohols, which allows the determination of the concentration of all the species occurring during the reaction, by means of the high performance liquid chromatography (HPLC), is described.It has been found that the relationship between the unchanged fraction and the fraction that reacts, theoretically inferred for ideal systems (null catalytic effects), is validated over the whole reaction for real systems.This fact is a verification that the reduced time, τ, is a result of the total catalytic effects, and is a surprising simplification of the kinetics of this type of complex process.The following value ratios of the rate constant (R) for the first and the second NCO groups for various di-isocyanates were determined: 4,4'-BDI R = 1.36, 4,4'-BBDI R = 1.30, p-PDI R = 2.57, m-PDI R = 3.07.

SYNTHESIS AND REACTIVITY OF N,N'-DIMETHOXYCARBONYL-p-BENZOQUINONE DIIMINE

The benzoquinone diimine derivative N,N'-dimethoxycarbonyl-p-benzoquinone diimine was synthesized by the oxidation of p-di(methoxycarbamoyl)benzene with lead tetraacetate in a mixture of benzene and chloroform, and its reactions with various nucleophilic