Topic
Fluorenone
About: Fluorenone is a research topic. Over the lifetime, 1067 publications have been published within this topic receiving 17162 citations. The topic is also known as: Diphenylene ketone & 9-Oxofluorene.
Papers published on a yearly basis
Papers
More filters
Patent•
07 Nov 2012
TL;DR: In this article, a vertically asymmetrical methyl spirobifluorene compound is described, where the structural formula of the product provided by the invention is as shown in the formula (I), wherein R1 can be various electron-withdrawing and electro-donating groups such as various alkyl groups, substituted aryl group, substituted heterocyclic radical group, substituting alkylene group, substitute amino group, chlorine, bromine, iodine and the like, but is not methyl.
Abstract: The invention relates to a vertically asymmetrical methyl spirobifluorene compound. The structural formula of the product provided by the invention is as shown in the formula (I), wherein R1 can be various electron-withdrawing and electro-donating groups such as various alkyl groups, substituted aryl group, substituted heterocyclic radical group, substituted alkylene group, substituted amino group, chlorine, bromine, iodine and the like, but is not methyl. Cheap and easily available 4,4'-dimethyl biphenyl is used as a raw material and undergoes bromination and reaction with 2,7-diX(X represents substituent)fluorenone, and the Xsubstituent on the fluorine ring is changed into various function groups so as to obtain the compound (I). The vertically asymmetrical methyl spirobifluorene compound provided by the invention has advantages of low product cost, simple synthetic route and high yield, is easy for industrial production, has a special spiro-conjugation effect, good dissolvability and high thermal stability, and can be widely applied in fields of organic electroluminesence display, organic non-linear materials, fluorescent probe and the like.
1 citations
1 citations
TL;DR: In this article, 1,1-Dicyanomethylene-3-indanone (2) reacted with cinnamonitriles 1a,c to afford fluorenone derivatives 6a-c.
Abstract: 1,1-Dicyanomethylene-3-indanone (2) reacted with cinnamonitriles 1a-c to afford fluorenone derivatives 6a-c. Compounds 6a-c were also obtained when treating 2 with 1d-f. The coupling of 2 with aromatic diazonium chlorides resulted in the formation of the hydrazones 8a-c. 8a readily cyclized to indeno[2,1-c]pyridazine (9a) in acidic medium. The action of 1d-f on enaminone 3 was also studied.
1 citations
Patent•
13 Dec 1995
TL;DR: In this article, a condensn. of 9,9-bis(4-hydroxyphenyl)fluorene with phenol in a strongly acidic medium, comprises two stages; (a) a condensation reaction at 55-65 degrees C and (b) an isomerisation reaction at 75-100 degrees C.
Abstract: Prepn. of 9,9-bis(4-hydroxyphenyl)fluorene (I) by a beta -mercaptopropionic acid or mercaptoacetic acid catalysed condensn. of fluorenone with phenol in a strongly acidic medium, comprises two stages; (a) a condensn. reaction at 55-65 degrees C. and (b) an isomerisation reaction at 75-100 degrees C..
1 citations
Patent•
13 Jun 1978
TL;DR: Amino secondary alcohols, e.g., quinine, epiquinine and quinidine, are oxidized to quininone by reaction of the alcohols with a metal ketyl, in an inert hydrocarbon solvent.
Abstract: Amino secondary alcohols, e.g. cinchona alkaloid such as quinine, epiquinine, quinidine, epiquinidine and mixtures thereof, are oxidized to quininone, i.e., a mixture of quininone and quinidinone, by reaction of the alcohols with a metal ketyl, in an inert hydrocarbon solvent. The ketyl is formed through the reaction of an alkali metal or amalgam with a diphenyl ketone, such as benzophenone or fluorenone.
1 citations