Showing papers on "Fluorenone published in 1972"

Flash Thermolysis: Quinones

Abstract: The flash thermolysis of a number of quinones is reported. p-Benzoquinone gives cyclopentadienone, isolated as the dimer. 2,5-Diphenylbenzoquinone gives 1- and 2-phenylnaphthalene together with benzo-[1,2-b:4,5-b′]bisbenzofuran. Yields are very poor. Anthraquinone and phenanthraquinone give fluorenone, and the latter quinone gives small amounts of biphenylene.

The photoreactions of aromatic carbonyl compounds with amines. Part III. The photoreactions of fluorenone with tertiary amines

Abstract: Flash-photolysis experiments have shown that electronically excited fluorenone reacts with NN-dimethylaniline in polar solvents, to give the radical cation of the amine and the radical anion of the ketone. In benzene solution, the only radicals detected were the 9-hydroxyfluorenyl radical and the fluorenone radical anion. By the same technique, excited fluorenone was shown to react with triethylamine in both polar and non-polar solvents to give the fluorenone radical anion and the 9-hydroxyfluorenyl radical. The former radical is probably produced by dissociation of the latter radical. The photoreactions of fluorenone with amines are interpreted in terms of exciplex and radical ion intermediates.

Persulphate oxidations. Part VII. Oxidation of o-benzyl- and o-benzoyl-benzamides

Abstract: Persulphate oxidation of o-benzylbenzamide gave mainly 2,2′-bibenzyl-αα′-diyldibenzamide, and smaller amounts of 3-phenylphthalide, 3-phenylphthalimidine, and related dimers. The initial oxidation occurs at the benzyl and not the amide group. Analogous products were obtained from the oxidation of o-benzylbenzoic acid. In both cases dimerisation at the benzylic position was suppressed by addition of copper(II) ions. Persulphate oxidation of o-benzoylbenzamide afforded phthalimide, fluorenone, and o-benzoylbenzoic acid.

Bis-basic esters of fluorene and fluorenone

Abstract: NOVEL FLUORENE AND FLUORENONE BIS-BASIC ESTER COMPOUNDS, THEIR METHODS OF PREPARATION AND USE AS ANTIVIRAL AGENTS. THE COMPOUNDS ARE REPRESENTED BY THE FORMULA 9-(Z=),BIS((R-N<(-(CH2)3-(CH2)M-))-(CH2)N-OOC-)FLUORENE WHEREIN Z IS OXYGEN OR H2; N IS 0, 1 TO 2; M IS 1 OR 2 AND R IS HYDROGEN, LOWER ALKAYL OF FROM 1 TO 4 CARBON ATOMS OR ALKENYL OF FROM 3 TO 6 CARBON ATOMS UNSATURATION IN OTHER THAN THE 1-POSITION OF THE ALKENYL GROUP AND WITH THE PROVISO THAT WHEN N IS 0 THE OXYGEN ATOM IS NOT CONNECTED TO THE CARBONS BEARING THEN NITROGEN ATOM OR TO THE NITROGEN ATOM OF THR HETEROCYCLIC RING. ALSO INCLUDED ARE THE ACID ADDITON SALTS OF THESE COMPOUNDS.

Fluorenone carboxylic acids for the prevention of the symptoms of asthma and allergin rhinitis

Abstract: Certain fluorenone and anthraquinone compounds, each of which is 2-substituted by a carboxyl group or a salt, ester or optionally substituted amide thereof and each of which is optionally substituted in the 5,6-, 7- or 8- position, by a second carboxyl group, salt, ester or optionally substituted amide thereof, the substitutent in the 5,6-7- or 8- position of the fluorenone compounds, also being selected from cyano, halogen, nitro, alkyl, alkoxy and acyl, are useful for the relief or prophylaxis of allergic conditions.