The synthesis of diarylamines by nitro-group displacement. Activation of anilines containing electron-withdrawing groups by potassium carbonate
作者:John H. Gorvin
DOI:10.1039/c39850000238
日期:——
Anilines of enhanced N-acidity can displace activated aromatic nitro-groups in dipolar aprotic solvents in the presence of potassiumcarbonate; the resulting diarylamines are generally obtained free of triarylamine and of the hydrogen displacement product.
Water-induced fluorescence quenching of mono- and dicyanoanilines
作者:Juro Oshima、Toshitada Yoshihara、Seiji Tobita
DOI:10.1016/j.cplett.2006.03.073
日期:2006.6
Photophysical properties of monocyano- (2-, 3-, and 4-cyano) and dicyano- (3,4-, 3,5-, 2,3-, 2,4-, 2,5-, and 2,6-dicyano) anilines are investigated by fluorescence measurements. All the monocyanoanilines are virtually nonfluorescent in water (quantum yield < 0.01); however, in nonaqueoussolvents (cyclohexane, acetonitrile and ethanol), the fluorescence quantum yield is enhanced substantially. In contrast
Certain acridone and xanthone 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 substituent in the 5-, 6-, 7- or 8-position of the acridone compounds, also being selected from cyano, halogen, nitro, alkyl, alkoxy and acyl, are useful for the relief or prophylaxis of allergic conditions.
Pharmaceutical composition containing acridone compounds and method of
申请人:Burroughs Wellcome Co.
公开号:US04250182A1
公开(公告)日:1981-02-10
Certain acridone and xanthone 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 substituent in the 5-,6-,7- or 8- position of the acridone compounds, also being selected from cyano, halogen, nitro, alkyl, alkoxy and acyl, are useful for the relief or prophylaxis of allergic conditions.
Certain cyclic carbonyl compounds used in the prophylaxis of allergic
申请人:Burroughs Wellcome Co.
公开号:US04061768A1
公开(公告)日:1977-12-06
A pharmaceutical composition and method for inhibiting the symptoms of allergic conditions such as asthma or allergic rhinitis which comprises administering a compound of the formula ##STR1## where Z.sup.2 is in the 6 position, wherein Z.sup.1 and Z.sup.2 are carboxylate, a pharmaceutically acceptable carboxylate salt, alkyl carboxylate, carboxamide, N-alkyl carboxamide, or N,N,-dialkylcarboxamide where alkyl in the above has 1 to 6 carbon atoms.