31776-84-8Relevant academic research and scientific papers
SYNTHESES OF 2-AZAFLUORENONES FROM 3-SUBSTITUTED 4-ARYLPYRIDINES
Shiao, Min-Jen,Liu, Kang-Hsiuan,Lin, Pen-Yuan
, p. 507 - 518 (2007/10/02)
3-substituted 4-arylpyridines (5a-i) were synthesized in good yields by reaction of mixed copper, zinc aryl organometallics (2a-e) with 1-ethoxycarbonylpyridinium chlorides (1a-d) followed by o-chloranil oxidation under reflux in toluene.The arylpyridines (5a-i) are obtained predominantly.Having compounds (5a-i) in hand, a convenient method was developed for the synthesis of 2-azafluorenones (7a-f) by using cyclization of 4-arylpyridines (5a-i) with phosphoric acid.
Pyridine derivatives and their use in liquid crystals
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, (2008/06/13)
A novel pyridine derivative which, when added to liquid crystal substances, can improve various specific features required for the resulting liquid crystal compositions, and a liquid crystal composition containing the same are provided, which pyridine der
