208450-84-4

Upstream product

• 156750-11-7 5-(bromomethyl)isophthalic acid diethyl ester 
• 181425-91-2 diethyl 5-(hydroxymethyl)isophthalate 
• 4105-92-4 triethyl benzene-1,3,5-tricarboxylate 
• 107-02-8 acrolein 
• 623-47-2 propynoic acid ethyl ester 
• 4105-93-5 1,3-bis(ethoxycarbonyl)benzoic acid 

Downstream Products

• 208450-89-9 5-[(E)-Benzylimino-methyl]-isophthalic acid diethyl ester 
• 226249-76-9 5-[1,3]dioxolan-2-yl-isophthalic acid diethyl ester 
• 918972-82-4 diethyl 5-(5,5-dimethyl-{1,3}-dioxane-2-yl)-isophthalate 

Relevant academic research and scientific papers

Water-soluble self-assembled butadiyne-bridged bisporphyrin: A potential two-photon-absorbing photosensitizer for photodynamic therapy

We have synthesized a novel, two-photon-absorbing photosensitizer for two-photon-absorption photodynamic therapy (2PA-PDT). The molecule is a butadiyne-bridged porphyrin dimer terminated with two water-soluble porphyrin monomers connected through Zn-imida

Facile synthesis and supramolecular network of a Zn(II)-octaesterporphyrin

The present work reports the synthesis of an octaester porphyrin and its Zn(II) complex which shows an unusual two-dimensional supramolecular coordination network structure.

Biaryl and atropisomeric biaryl aldehyde synthesis by one-step, metal-free benzannulation of aryl enals and propiolates

A new method involving the benzannulation of aromatic enals and two alkyl propiolate molecules has been developed as a powerful route to biaryl aldehydes simply via the promotion of dimethyl amine. The benzannulation process in the absence of an oxidant additive tolerates successfully the formyl group in the enal component, leading to a straightforward one-step synthesis of biaryl and atropisomeric aldehydes. An enamine activation based on the aza-Michael addition of dimethyl amine to the propiolate and the amine elimination-based generation of cyclohexadiene intermediate constitute the major factors enabling the titled reactions. This journal is

The organic pigment, and photosensitive element

PROBLEM TO BE SOLVED: To provide an organic coloring matter suitable for production of a photosensitive element capable of effectively utilizing visible light.SOLUTION: An organic coloring matter is represented by formula (1), where Rto Rrepresent chromop

Anionic hexadeca-carboxylate tetrapyrazinoporphyrazine: Synthesis and in vitro photodynamic studies of a water-soluble, non-aggregating photosensitizer

A sodium salt of zinc tetrapyrazinoporphyrazine bearing eight 3,5-dicarboxylatophenyl substituents (1) was synthesized. The presence of sixteen negative charges in a rigid arrangement on the periphery of the macrocycle inhibited its aggregation in water or buffers at pH > 5.8. Strong aggregation was, however, observed in buffers at pH 50 = 5.7 ± 1.1 μM) was found to be influenced by both pH and interactions with serum proteins. This was demonstrated with a detailed in vitro study based on the inhibition of vacuolar H+-ATPase using bafilomycin A1, which increased the intracellular fluorescence of 1. Compound 1 also formed interactions with serum proteins that partially quenched its excited states; however, they also protected the compound from self-aggregation at low pH.

Efficient charge injection from the S2 photoexcited state of special-pair mimic porphyrin assemblies anchored on a titanium-modified ITO anode

A novel surface fabrication methodology has been accomplished, aimed at efficient anodic photocurrent generation by a photoexcited porphyrin on an ITO (indium-tin oxide) electrode. The ITO electrode was submitted to a surface sol-gel process with titanium

Fluorescence quenching and size selective heterodimerization of a porphyrin adsorbed to gold and embedded in rigid membrane gaps

Octaanionic meso-tetra(3,5-dicarboxylatophenyl) porphyrin 1 was adsorbed to gold electrodes at pH 12 and stayed there after repeated washing with 10- 2 M KOH. The fluorescence on sputtered gold surfaces amounted to 10% of the intensi

Synthesis, structural, EPR and magnetic analysis of nitronyl-nitroxide labelled isophthalic acid

The high yield synthesis of an isophthalic acid derivative bearing a nitronyl-nitroxide moiety at the 5-position was achieved. The structural analysis in the crystalline phase by X-ray diffraction on single crystals revealed the formation of a 3-D network through strong H-bonds between the acid groups and the nitronyl-nitroxide moieties. The spin label obtained was also analysed by EPR spectroscopy which showed a five line pattern with a(N)=7.51 G and a g-factor of 2.0066. Magnetic measurements revealed that at low temperature, the systeme showed a Curie-Weiss like behaviour with weak ferromagnetic intermolecular interactions.

Combining different hydrogen-bonding motifs to self-assemble interwoven superstructures

A series of carboxyl-substituted dibenzylammonium salts have been cocrystallized with the macrocyclic polyethers dibenzo[24]crown-8 (DB24C8) and bis-p-phenylene[34]crown-10 (BPP34C10) to effect the noncovalent syntheses of a wide range of interwoven superstructures in the solid state. In all cases, the dibenzylammonium cations thread through the cavities of the macrocyclic polyethers - primarily as a result of N+-H ··· O hydrogen bonds, with occasional secondary stabilization from C - H ··· O and aryl-aryl interactions - to form pseudorotaxane complexes possessing supplementary recognition sites (specifically, carboxyl groups) for further intercomplex association through hydrogen bonding. One unit of each of the dibenzylammonium cations threads through the DB24C8 macrocycle to make single-stranded, carboxyl-containing [2]pseudorotaxanes that interact further with one another to produce novel supramolecular architectures as a result of hydrogen bonding between their carboxyl groups (the carboxyl dimer supramolecular synthon), or between carboxyl groups and polyether oxygen atoms. Elaborate architectures, such as side-/main-chain pseudopolyrotaxanes and a daisy-chain-like supramolecular array, were thus synthesized noncovalently. BPP34C10 can accommodate two cations within its macrocyclic interior to form carboxyl-containing [3]pseudorotaxanes in which BPP34C10 acts as a girdle that helps to control the spatial orientation of the carboxylic acid-containing recognition sites for additional intersupramolecular association through the carboxyl dimer. PF6/- anions were also found to play a role in the self-assembly processes. When the anions interact with the [3]pseudorotaxanes, these recognition sites are oriented in the same direction. This leads to the formation of doubly-encircled multicomponent supermolecules when BPP34C10 is cocrystallized with dibenzylammonium cations bearing only one carboxyl substituent. On the other hand, when BPP34C10 is cocrystallized with an isophthalic acid-substituted ammonium cation, there is no evidence of any anion assistance to self-assembly; the isophthalic acid units are aligned in opposite directions, creating an interwoven supramolecular cross-linked polymer.