940949-09-7Relevant academic research and scientific papers
Highly regioselective α-arylation of coumarins via palladium-catalyzed C-H activation/desulfitative coupling
Jafarpour, Farnaz,Olia, Mina Barzegar Amiri,Hazrati, Hamideh
, p. 3407 - 3412 (2013)
A novel regioselective α-arylation of coumarins with readily available arenesulfonyl chlorides and sodium arenesulfinates via palladium-catalyzed direct C-H functionalizations under mild reaction conditions is described. This protocol presents an unexpected and highly regio-controlled arylation of coumarins at C-3 to construct interesting 3-arylcoumarins with fascinating biological and fluorescent properties. The regioselectivity observed is in sharp contrast with that expected for the Heck reactions. Copyright
Palladium catalyzed dehydrogenative arylation of coumarins: An unexpected switch in regioselectivity
Jafarpour, Farnaz,Hazrati, Hamideh,Mohasselyazdi, Nazanin,Khoobi, Mehdi,Shafiee, Abbas
supporting information, p. 10935 - 10937 (2013/11/19)
A new regioselective α-arylation of coumarins with unactivated simple arenes via a palladium-catalyzed twofold C-H functionalization is devised. This method offers an attractive new approach to synthesis of a wide variety of 3-arylcoumarins from readily accessible starting materials. This journal is The Royal Society of Chemistry 2013.
COMPOUND HAVING HYDROCOUMARIN SKELETON, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT
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Page/Page column 36, (2008/12/07)
A liquid crystal compound is to be obtained that has stability to heat, light and so forth, a high clearing point, a suitable optical anisotropy, a large negative dielectric anisotropy, and excellent compatibility with other liquid crystal compounds. A liquid crystal composition containing the compound is also to be obtained that has a low viscosity, a suitable optical anisotropy, a suitable negative dielectric anisotropy, a low threshold voltage, a high maximum temperature of a nematic phase (phase transition temperature from a nematic phase to an isotropic phase), and a low minimum temperature of a nematic phase. A compound having a hydrocoumarin skeleton is synthesized, and a liquid crystal composition containing the compound is produced.
