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275 Words


PDF Downloads : Oriental Journal of Chemistry

The copolymer poly[3-(2-hidroxiethyl) thiophene-co-3-hexadecylthiophene] was synthesized chemically through the coupling of its comonomers by ferric chloride.


Polycyclic aromatic hydrocarbons (PAHs) represent an important class of fundamental pai-systems. Triphenylene, one of the simplest framework of PAHs, and its derivatives have been extensively investigated in terms of their unique structures and properties. To further modulate their inherent structural and electronic features, many benzo derivatives have been synthesized. On the other hand, the incorporation of thiophene rings onto PAHs exhibits considerable success in the design of unique organic semiconductors. In this context, we have previously reported the synthesis, properties, and bowl-shaped structure of hexathienotriphenylene that is formally isoelectronic with coronene. Here, we report on the synthesis, structure, and properties of novel six-thiophene-annelated triphenylene 1, which is isoelectronic with hexabenzotriphenylene .

Synthesis and Antitumor Evaluation of Thiophene …

129In addition, a series of red to purple or violet bis-hetarylmonoazo dyes derived from different heterocycles 16 has been synthesized from the coupling reactions of diazotized diazo components, poly substituted 2-aminothiophenes with the corresponding coupling components, 2-pyridone and 5-pyrazolone derivatives, respectively.

128A series of red to blue hetarylazo dyes 15 with good fastness was synthesized by coupling reaction of 4-aryl-2-aminothiophenes derivatives with diazotized 5-nitro-2-aminothiazole and 6-nitro-2-aminobenzothiazole, respectively, as diazo components.

Synthesis of Thiophene-Containing Hybrid Calixphyrins …

Finally, it should be noted that this area of chemistry of thiophene-based azo dyes still has much to contribute to organic synthesis and the development of new, important dyes.

The synthesis of disazo disperse dyes whereby2-amino-4,5,6,7-tetrahydrobenzo[b]thiophenes are utilized as the first component with phenyl 112 or naphthyl 113 middle components has been described.

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Synthesis of Thiophene-Containing Hybrid Calixphyrins ..

A number of researchers studied aminothiophene derivatives as azo disperse dyes in the dyeing of synthetic fibers[29] and blended polyester/wool fibers[30,31].Despite 62 years having elapsed since thienyl-2-azo dyes were first scrutinized systematically, and the continued industrial interest in them, prior to the end of the previous decade, only a very limited amount of information pertaining to the synthesis, properties and application of such dyes existed outside the patent literature.

Synthesis and reactions of thiophene, ..

A systematic study by Dickey[23] was published which established the better relative bathochromy of thiophene azo dyes over their carbocyclic counterparts and provided qualitative evidence of the higher absorption intensities of the former dye type.A one-pot procedure by Gewald[25-27] to the synthesis of 2-aminothiophenes sparked the renewed commercial interest in these compounds as diazo components.

Catalytic Synthesis of Thiophene-2,5-dicarboxylic Acid …

[GRAPHIC]Thiophene dendrons and dendrimers were designed and synthesized using a convergent approach. Metal-mediated coupling reactions were used in the synthesis. A rational approach allowed the formation of alphaalpha, betabeta, and alphabeta linkages between the dendrons and thiophene units.

Catalytic Synthesis of Thiophene-2,5-dicarboxylic Acid and Its Esters

This was undoubtedly the motive for renewed patent activities mainly on the part of Japanese dye manufacturers in the area of 3-cyano5-nitrothiophene2-azodyes. 71, 72Dyes derived from 2-amino-3-cyano-5-nitrothiophene have been extensively patented in the past, and have featured in recent patents concerning the dyeing and printing of hydrophobic fabrics, 71, 72, 73,74 for example, in the preparation of blue colorants which can be applied under alkaline conditions, 75 a dye of this kind has been commercialized and introduced to the Japanese market. 76 Specific crystal modifications of particular structures derived from this diazo component, as well as post-synthetic methods for obtaining them, have been claimed. 77-80 Patents covering the use of this class of dyes in mixtures formulated with aminoazobenzene- and anthraquinone-based colorants have also appeared, for example, in the production of blue, 81-84 as well as green, turquoise and navy dyestuffs.

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