849-97-8

Upstream product

• 859736-30-4 N',N'''-dinitro-N,N''-ethanediyl-di-urea 
• 62-53-3 aniline 
• 7647-01-0 hydrogenchloride 
• 854887-11-9 N-[2-(2-oxo-3,4-diphenyl-[1,3]diazetidin-1-yl)-ethyl]-N'-phenyl-urea 
• 103-71-9 phenyl isocyanate 
• 107-15-3 ethylenediamine 
• 64-10-8 phenyl carbamate 
• 66072-67-1 N,N'-bis[1-(9H-fluoren-2-yl)ethylidene]-1,2-ethanediamine 
• 61484-71-7 N,N'-bis[1-(2-naphthalenyl)ethylidene]-1,2-ethanediamine 
• 16888-80-5 bis(acetophenone)ethylenediamine 
• 929-26-0 1,2-ethylene diisocyanate 
• 73674-56-3 3-benzenesulfonyloxy-dihydro-pyrimidine-2,4-dione 

Relevant academic research and scientific papers

Catalytic Aerobic Oxidation of Alcohols by Copper Complexes Bearing Redox-Active Ligands with Tunable H-Bonding Groups

In this research article, we describe the structure, spectroscopy, and reactivity of a family of copper complexes bearing bidentate redox-active ligands that contain H-bonding donor groups. Single-crystal X-ray crystallography shows that these tetracoordi

ORGANIC MOLECULES FOR TERAHERTZ TAGGING APPLICATIONS

The present invention discloses substituted heterocyclic compounds and /or aromatic compounds containing amide and/or urea groups exhibiting resonance in the range of 0.1- 10 THz. The invention also discloses binary molecular complexes based on the substituted heterocyclic compounds and/or aromatic compounds containing amide and/or urea groups of the present invention. The compounds and binary molecular complexes of the present invention have varying molecular mass and hydrogen bond strengths demonstrating several resonances below 10 THz. The compounds and binary molecular complexes of the present invention are customizable for various applications, such as authentication of a product.

Synthesis of unsymmetrical ureas and S-thiocarbamates under catalyst-free conditions in a [BMIM]BF4 ionic liquid

Unsymmetrical ureas and Sthiocarbamates were prepared in good to excellent yields by direct condensation of phenylurea with amines and thiols in 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) without the addition of any additives. The [BMIM]BF4 ionic liquid is a mild medium and can be recycled and reused several times.

An efficient and mild protocol for the synthesis of unsymmetrical ureas in the absence of catalyst and additives

A new practical method for the synthesis of unsymmetrical ureas was achieved by reaction of phenylurea with primary and secondary amines under neutral and mild condition in very good yields. The reaction took place in refluxing dioxane and does not require any catalyst or additives.

Mechanism of a chain-extending reaction in the synthesis of segmented poly(urethane-urea) using blocked ethylenediamine

An attempt was made to clarify the mechanism of a chain-extending reaction of NCO-terminated prepolymers in the synthesis of segmented poly(urethane-urea) using blocked ethylenediamine (EDA) with acetone (ACE). For this purpose, an ACE/EDA mixture was allowed to react with phenyl isocyanate (PhNCO) as a model of the prepolymer. The reaction of PhNCO with the ACE/EDA mixture, which was proved to contain ketimine and imidazolidine compounds by NMR measurements, gave 1,1′-ethylenebis[3-phenylurea] (M-Ur-1) as the main product; at the same time 1,3-diphenylurea (1, 3-DPU) was assumed to be formed as a side-reaction product between PhNCO and H2O, inevitably existing in the mixture as the result of condensation. From a considerable increase in the yield of M-Ur-1 upon the addition of an excess amount of H2O to the reaction system, H2O was elucidated to participate in the acceleration of the main reaction, giving M-Ur-1 as well as in the side reaction, yielding 1,3-DPU. The excess H2O added to the system might preferentially facilitate the former reaction, rather than the latter.

Process for preparing substituted urea derivatives

A process for the preparation of substituted urea derivatives, and compositions and concentrates for the same purpose are disclosed. According to the process the substituted urea derivatives of formula (I) STR1 wherein R is hydrogen, alkyl, aryl, cycloalkyl or aralkyl, R1 and R2 are hydrogen, alkyl, alkenyl, alkinyl, alkoxy, oxyalkyl, cycloalkyl, aralkyl, alkoxycarbonylalkyl, aryl or heteroaryl, or R1 and R2 together with the adjacent nitrogen atom may form a saturated or unsaturated heterocycle, or a condensed and/or substituted ring system, and said heterocycle or said condensed and/or substituted ring system may contain also a sulfo group, can be manufactured by reacting an amine of formula (II) STR2 with an N-carbamoyl-benzoic acid sulfimide derivative of formula (III) STR3 The disclosed N-acylating composition comprises of from 3 to 60% by weight, preferably of from 5 to 50% by weight sulfimide derivative of formula (III), of from 97 to 40% by weight, preferably of from 95 to 50% by weight solvent, and if desired, an organic or inorganic base. The disclosed N-acylating concentrate comprises of from 60 to 95.5% by weight N-acylating agent of formula (III) and of from 4.5 to 40% by weight additives.