91767-35-0Relevant academic research and scientific papers
Liquid crystalline compound having a negative dielectric anisotropy value, liquid crystal composition containing the liquid crystalline compound, and liquid crystal display element produced utilizing the liquid crystal composition
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, (2008/06/13)
The present invention provides a liquid crystal compound having a negative dielectric constant anisotropy value of a large absolute value, a controlled optically anisotropy value, a high resistivity, a high voltage retention, and high stability against he
Liquid crystal compound having negative dielectric anisotropy, liquid crystal composition containing said liquid crystal compound and liquid crystal display device using said composition
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, (2008/06/13)
A liquid crystal compound which has a tetrahydropyran-2,5-diyl group and a ring represented by the following general formula (1) in the general structure of the compound: wherein W1and W2each independently represents a fluorine or ch
SCHWEFELVERBINDUNGEN DES ERDOELS XXII. ALKYL-10,11-DIHYDRODIINDENOTHIOPHENE
Boberg, Friedrich,Deters, Karin,Schulz, Juergen,Torges, Karl-Franz
, p. 69 - 80 (2007/10/03)
The one-pot syntheses of alkyl-10,11-dihydrodiindenothiophenes (3) by bromination and sulfurization of alkylindan-1-ones without substituents at C-2 (1) has been studied with 14 1 with C1-C4-rests at the benzene and or the cyclopentane ring. 9 dialkyl-3 and 3 tetraalkyl-3 are prepared in yields of 7-66percent; an octamethyl-3 is detected by tlc and ms. 2 dialkyl-3 are prepared too by an independent syntheses from dimethyl 2,5-bis(methylphenyl)thiophene-3,4-dicarboxylates (13).The mechanism of the one-pot syntheses, which gives diindeno-1,4-dithiines too,is discussed.The oxidation of 4 3 has been studied.Key words: Alkylindan-1-ones, alkyl-10,11-dihydrodiindenothiophenes, alkyldiindeno-1,4-dithiines, one-pot syntheses of anellated thiophenes, oxidation of anellated thiophenes.
