Patent GB-1408964-A (GB)
Title: 1-aralkyl-indenyl-3-acetic acids methods for their preparation and compositions containing them
IPC: C07C45/46
Filed: 1973-07-16
Abstract: 1408964 3-(Aryl methyl )-indenyl-1 -alkanoic acids and derivatives MERCK & CO Inc 16 July 1973 [21 July 1972] 33858/73 Heading C2C Novel compounds I in which R 1  and R 2  are hydrogen, fluorine, alkyl, alkenyl, aryl, haloalkyl, alkylthio, arylthio, aralkylthio, dialkylamino, acylamino, alkoxy, alkenyloxy, alkynyloxy, aralkoxy, carboxy, or alkoxycarbonyl or R 1  is hydrogen and R 2  is amino, hydroxy or morpholino, R 3  is hydrogen, alkyl, haloalkyl, alkeny or alkynyl; R 4 , R 5 , R 6 , R 8  and R 9  are hydrogen, alkyl, acyloxy, aryloxy, alkoxy, nitro, amino, acylamino, alkyalmino, dialkylamino alkoxyamino, alkenyl, alkynyl, alkenyloxy, dialkylaminoalkyl, sulfamoyl, alkylsulphamoyl, dialylsulphamoyl, alkylthio, alkylsulfinyl, alkylsulfonyl, hydroxy, hydroxyalkyl, acyl, halo, cyano, carboxyl, carboalkoxy, carbamoyl, alkylcarbamoyl, dialkylcarbamoyl, haloalkyl, cycloalkyl or cycloalkyloxy; (with the exception that when R 8  or R 9  is methylsulphuryl and the other is hydrogen; R 1 , R 2 , R 4 , R 5  and R 7  are hydrogen; (Ar) is phenyl, R 3  is methyl and M is hydroxy then R 6  is other than fluoro) (Ar) is aryl or heteroaryl, M is hydroxy alkoxy, hydroxyalkoxy, benzyloxy, phenoxy, benzyloxy-C 1-3  alkoxy, trityloxy, alkanoyloxyalkoxy of up to 6 carbon atoms, #-acetamido alkoxy, alkoxyalkoxy, alkoxyalkoxyalkoxy, #-dialkylaminoalkoxy, #-1-piperidinylethoxy, # - 1 - pyrrolidinylethoxy, 1 - pyrrolidinylmethoxy, # - morpholinoethoxy, # - 4 - methyl- 1 - piperazinylethoxy, N - alkyl - pyrrolidin - 2- ylmethoxy, amino, alkylamino, dialkylamino, cycloalkylamino, aralkylamino, diaralkylamino, - morpholino, N-piperidinyl, N-pyrrolidinyl, N- (4 - methylpiperazinyl), N - (4 - phenylpiperazinyl), N - (4 - # - hydroxyethylpiperazinyl), N - piperazinyl, anilino, p - haloanilino, pethoxyanilino, p - trifluoromethylanilino, D- glucosamino, tetra - O - acetyl - d - glucosamino, D - galactosylamino, D - mannosylamino, dialkylcarbamoyl - methylamino, benzyloxycarbonyl - methylamino, hydroxyalkylamino, di(hydroxyalkyl)amino, (polyhydroxy)alkylamino, (alkoxyalkyl)amino, di(alkoxyalkyl)- amino, aminoalkylamino, alkylaminoalkylamino, dialkylaminoalkylamino, α or # glucoronide, OMe (where Me is a cation) or a group Y of Formula II are prepared by halogenating a compound III in which X is -CH= or -CH(halogen)-. Compounds I which are estes, amides, anhydrides and salts are also prepared by conventional methods from the corresponding acid or acid chloride. 5 - Fluoro - 2 - methyl - indene - 3 - acetic acid is prepared from p-(R 6 ) α-methyl-cinnamic acid by hydrogenation and reaction with polyphosphoric acid to form the indonone which is reacted with cyanacetic acid. 5-Fluoro-2- methyl - 1 - oxo - indene - 3 - acetic acid is prepared from the above compound by air oxidation and thence the t-butyl ester which is reduced to the corresponding 1-hydroxy compound which is reacted with POCl 3  to give the 1-chloroderivative which is reacted with an aldehyde to give a compound II in which R 1 , R 2 , R 4 , R 5  and R 7  are hydrogen and (X) is -CH(-OH)- which may be chlorinated or dehydrated. R 6  may also be methoxy or nitro, R 2  may be fluoromethyl, R 5  may be methyl and R 1  may be amino, dimethylamino, hydroxy, methoxy fluoro morpholino or acetamido. 1-Formyl-5- fluoro - 2 - methyl - 3 - indenyl acetic acid is prepared by forming the 1-methylene derivative from t-butyl-5-fluoro-1-oxo-2-methyl-3-indenyl acetate by a Grignard reaction, epoxidizing the methylene group using peracetic acid, oxidizing the oxirane ring to a formyl group using borontrifluoride etherate and saponifying the ester. The formyl derivitive is reacted with p-methylthiobenzyl bromide to give the corresponding compound II in which X is -CH(OH)-. Compounds I (including that excluded by the proviso) are anti-inflammatory agents and have anti-pyretic and analgesic activity. They form with a carrier a pharmaceutical composition which may be administered orally, parenterally or rectally.