219597-02-1Relevant articles and documents
2,6-Diphenylbenzo[1,2-b:4,5-b′]dichalcogenophenes: A New Class of High-Performance Semiconductors for Organic Field-Effect Transistors
Takimiya, Kazuo,Kunugi, Yoshihito,Konda, Yasushi,Niihara, Naoto,Otsubo, Tetsuo
, p. 5084 - 5085 (2004)
2,6-Diphenylbenzo[1,2-b:4,5-b′]dichalcogenophenes including thiophene, selenophene, and tellurophene analogues as organic semiconductors for field-effect transistors were effectively synthesized in three steps from commercially available 1,4-dibromobenzen
Nickel-catalyzed and Li-mediated regiospecific C-H arylation of benzothiophenes
Canivet, Jér?me,Grousset, Léonie,Hisler, Ga?lle,Mohr, Yorck,Quadrelli, Elsje Alessandra,Roux, Yoann,Wisser, Florian M.
, p. 3155 - 3161 (2020/06/19)
A nickel-based catalytic system for the regiospecific C2-H arylation of benzothiophene has been established. NiCl2(bpy) is used as a catalyst in combination with LiHMDS as a base in dioxane. The catalytic system is applicable to a variety of functionalized benzothiophenes, as well as other heteroarenes including thiophene, benzodithiophene, benzofuran and selenophene in combination with iodo aryl electrophiles. The role of LiHMDS as a uniquely potent base and a postulated mechanism are discussed. The applicability of this system is finally demonstrated for the synthesis of an intermediate of an active pharmaceutical ingredient.
METHOD FOR PRODUCING AROMATIC COMPOUND
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Page/Page column 16, (2010/02/17)
Disclosed is a method for producing an aromatic compound represented by the general formula (2) below, which is characterized in that a compound represented by the general formula (1) below is reacted with a sulfur compound (at least one member selected from the group consisting of sulfur, hydrogen sulfide, metal hydrosulfides and metal sulfides) or a selenium compound. (In the formula (1), R1 represents a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an ester group, an optionally substituted alkyl group having 1-18 carbon atoms or the like; R2 represents a halogen atom; R3 represents a hydrogen atom, C≡C-R1 or R2; and n represents an integer of 0-4. When n is not less than 2, R3's may be the same as or different from each other.) (In the formula (2), R1, R3 and n are as defined in the formula (1); and X represents a sulfur atom or a selenium atom.)
One-pot synthesis of benzo[b]thiophenes and benzo[b]selenophenes from o-halo-substituted ethynylbenzenes: convenient approach to mono-, bis-, and tris-chalcogenophene-annulated benzenes
Kashiki, Tomoya,Shinamura, Shoji,Kohara, Masahiro,Miyazaki, Eigo,Takimiya, Kazuo,Ikeda, Masaaki,Kuwabara, Hirokazu
supporting information; experimental part, p. 2473 - 2475 (2009/10/18)
A convenient one-pot procedure for the synthesis of benzo[b]thiophenes and selenophenes from readily available o-halo-ethynylbenzene precursors is described. Regardless of the substituent on the acetylene terminus or the number of cyclization moieties on the precursors, various benzo[b]thiophenes and selenophenes, including not only the parent, alkyl-, and phenyl-substituted derivatives but also benzo[1,2-b:4,5-b']dithiophenes and diselenophenes and benzo[1,2-b:3,4-b':5,6-b'']trithiophenes and triselenophenes can be prepared in good to high yields.