67126-75-4

Upstream product

• 931424-12-3 methyl 4-{[(Z)-2-amino-1,2-dicyanovinyl]amino}methyleneaminobenzoate 
• 122-51-0 orthoformic acid triethyl ester 
• 619-45-4 4-methoxycarbonyl aniline 
• 64-19-7 acetic acid 
• 150-13-0 4-amino-benzoic acid 

Downstream Products

• 95627-01-3 N,N'-bis(4-carboxyphenyl)ethylenediamine 
• 67126-74-3 N,N'-bis-(4-carboxy-phenyl)-formamidine 
• 6968-79-2 4,4'-ethane-1,2-diyldiamino-bis-benzoic acid dimethyl ester 

Relevant academic research and scientific papers

Catalyst-Free Synthesis of Aryl Diamines via a Three-Step Reaction Process

The formation of C-N bonds with aryl amines is one of the most widely studied reactions in organic chemistry. Despite this, it is still highly challenging, often requiring expensive, precious metal-based catalysts. Here we report an easy catalyst-free methodology for constructing C-N bonds. The method, which proceeds via the in situ formation of closed ring amidinium ions, allows the preparation of a series of symmetrical and/or unsymmetrical aryl diamines in notably high yields (82-98%) and purity and with a variety of different substituents. The methodology is shown successful for the preparation of aryl diamines having para- and/or meta-substituted carboxyl, nitro, bromo, methoxy, or methyl groups. This green synthetic pathway, which is catalyst free, requires only three steps, and proceeds without the need for purification. Further, it is a new sustainable, economically viable method to achieve an otherwise challenging bond formation.

Selective CO2 adsorption by a new metal-organic framework: synergy between open metal sites and a charged imidazolinium backbone

Metal-organic frameworks (MOFs) are porous, tunable crystalline materials that are attracting widespread scientific attention for their potential use in post-combustion CO2 capture. In this work, we report the synthesis of a new ligand, 1,3-bis(4-carboxyphenyl)-4,5-dihydro-1H-imidazol-3-ium tetrafluoroborate, H2Sp5-BF4, that is subsequently used for the construction of a novel MOF, Cu-Sp5-EtOH. This highly crystalline material has a charged framework that is expected to give rise to high CO2/N2 selectivity. However, the pores of the parent structure could not be accessed due to the presence of strongly coordinated ethanol molecules. After solvent exchange with methanol and subsequently heating Cu-Sp5-MeOH under vacuum, we are able to liberate the solvent providing other small molecules like CO2 access to the inside of the now porous structure, Cu-Sp5. The combination of open metal sites and framework charge leads to an exceptionally high CO2/N2 selectivity, as determined by Ideal Adsorbed Solution Theory (IAST) calculations performed on single-component adsorption isotherms. The CO2/N2 selectivity of Cu-Sp5 reaches a value of over 200 at pressures typically found in post-combustion flue gas (0.15 bar CO2/0.85 bar N2), a value that is among the highest reported to date.

ULTRAVIOLET ABSORBER AND PLASTIC ARTICLE HAVING THE ULTRAVIOLET ABSORBER

This invention discovers UV absorbers and plastic products having the UV absorbers. The UV absorbers have high UV absorption and excellent thermal stability. The plastic products containing the UV absorbers have superior ability to against UV radiation and the durability of the plastic products is thus enhanced.

A facile regioselective synthesis of (5-amino-4-cyano-1H-imidazol-1-yl) benzoic acids

(Chemical Equation Presented) A simple and efficient method was developped for the synthesis of 3-(5-amino-4-cyano-1H-imidazol-1-yl)-4-substituted benzoic acids 3. These compounds were isolated by intramolecular cyclisation of the corresponding 3-{[(Z)-2-amino-1,2-dicyano-vinyl]amino}methyleneaminobenzoic acids in the presence of base.