Patent GB-1140086-A (GB)
Title: Acridan derivatives and processes for their production
IPC: A61K31/00
Filed: 1966-03-23
Abstract: 1,140,086. Substituted acridans; amines. J. R. GEIGY A.G. 23 March, 1966 [24 March. 1965], No. 12700/66. Heading C2C. Novel acridans of the general formula and acid addition salts thereof wherein R 1  represents C 1-4  alkyl, R 2  represents hydrogen, C 1-4  alkyl or together with R 1  polymethylene, R 3  and R 4  each represent chlorine, bromine or fluorine, trifluoromethyl, C 1-3  alkyl or C 1-3  alkoxy, R 5  represents phenyl, biphenylyl or phenoxyphenyl, the benzene nuclei of all of which can contain up to three halogen atoms, trifluoromethyl, nitro, amino, C 1-4  alkyl, C 1-4  alkoxy, C 1-4  alkylamino, di-(C 1-4  alkyl)-amino or C 2-5  alkanoylamino groups, or R 5  represents a pyridyl radical optionally substituted by halogen atoms or C 1-4  alkyl or C 1-4  alkoxy groups, R 6  represents hydrogen or C 1-6  alkyl, and A represents C 2-6  alkylene, are prepared by reacting a reactive ester of the required 10- hydroxyalkyl-acridan with an amine R 5 R 6 NH, by reacting a 10-alkali metal derivative of the required acridan with HO-A-NR 5 R 6 <SP>1</SP> wherein R 6 <SP>1</SP> is C 1-6  alkyl, by reducing the corresponding acridan having at the 10-position the group -CO-A<SP>1</SP>-NR 5 R 6  wherein A<SP>1</SP> represents alkylidene or alkylene having 1 to 5 carbon atoms, by heating the required acridan having at the 10-position the grouping -CO-A-NR 5 R 6 1 until an equimolar amount of carbon dioxide is split off, by reacting the required acridan having at the 10-position the group -A-NHR 5  with a reactive ester of a C 1-6  alkanol to replace the hydrogen atom in the said grouping by a C 1-6  alkyl radical, by reacting a compound of the first formula above in which R 6  is a hydrogen atom with an oxoalkane under reducing conditions to form the corresponding compound in which R 6  is alkyl, and by reacting a compound of the formula wherein R 3 , R 4 , R 5 , R 6  and A have the above significance, R 1 <SP>1</SP> represents a C 1-4  alkyl radical and R 2 1 represents hydrogen, a C 1-4  alkyl radical or together with R 1 <SP>1</SP> a polymethylene radical, with an acid condensing agent in an inert solvent to form an acridan of the first formula above in which R 1  and R 2  represent C 1-4  alkyl. Therapeutic compositions having antiviral, analgesic, and tumour inhibiting properties contain the above novel acridans as the active ingredient and may be in a form suitable for oral, rectal or parenteral administration. 10 - (3 - chloropropyl) - 9,9 - dimethyl - acridan is prepared by reacting 9,9-dimethyl-acridan with l-bromo-3-chloropropane in the presence of sodamide. 10 - [N - (4,5 - dichloro - 2 - methylphenyl) - glycyl] - 9,9 - dimethyl - acridan is prepared by reacting 9,9-dimethyl-acridan with chloracetyl chloride and reacting the resulting 10-chloracetyl - 9,9 - dimethyl - acridan with 4,5- dichloro-2-toluidine. 9,9 - Dimethyl - acridan - 10 - carboxylic acid 2-(N-methylanilino) - ethyl ester is prepared by reacting 9,9 - dimethyl - 10 - chlorocarbonylacridan and 2-(N-methylanilino)-ethanol. 2 - Isopropenyl - AT - (N - methylanilinoethyl)- diphenylamine is prepared by reacting methyl magnesium iodide and N-phenyl-anthranilic acid methyl ester and reacting the resulting 2 - isopropenyl - diphenylamine with N- chlorethyl-N-methyl-aniline.