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词条 Thienothiophene
释义

  1. References

Thienothiophene usually refers to any of three structurally related derivatives of thiophene with the formula C6H4S2. In order of importance, they are: thieno(3,2-b)thiophene, thieno(2,3-b)thiophene, and thieno(3,4-b)thiophene. Other isomers feature S(IV) and are less stable.[1] Thieno[2,3-b]thiophene was the first member of the series to be isolated. It was obtained in very low yield upon heating citric acid, a source of a six-carbon linear chain, with P4S10.[2] More efficient syntheses of this and the other two stable thienothiophenes involve cyclization reactions of substituted thiophenes.[3]

Three thienothiophenes, being aromatic and bicyclic, are often compared with napthalene. They are the topic of academic research. They have no commercial applications nor are they or their derivatives found naturally.

References

1. ^{{cite journal|title=Nonclassical Condensed Thiophenes|authors=Cava, Michael P.; Lakshmikantham, M. V.|doi=10.1021/ar50088a005|journal=Accounts of Chemical Research|year=1975|volume=8|pages=139-44}}
2. ^{{cite encyclopedia|doi=10.1016/S0065-2725(08)60231-7|title=The Chemistry of Thienothiophenes and Related Systems|encyclopedia=Advances in Heterocyclic Chemistry|year= 1976|authors=V. P. Litvinov, Y. A. L. Gol'dfarb|volume=19|pages=123-214}}
3. ^{{cite journal|authors=Cinar, M. E.; Ozturk, T.|title=Thienothiophenes, Dithienothiophenes, and Thienoacenes: Syntheses, Oligomers, Polymers, and Properties|journal=Chemical Reviews|year=2015|volume=115|pages=3036-3140|doi=10.1021/cr500271a}}
4. ^{{cite journal|doi= 10.1039/C39880000959|title=Generation and Characterization of the Parent 2λ4δ2-Thieno[3,4-c]thiophene|authors=Nakayama, Juzo; Ishii, Akihiko; Kobayashi, Yasunobu; Hoshino, Masamatsu|journal=Journal of the Chemical Society, Chemical Communications|year=1988|volume=14|pages=959-60}}

2 : Sulfur heterocycles|Heterocyclic compounds (2 rings)

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