Dibenzocycloheptene derivatives

摘要

The invention comprises compounds having the formula or in which X11 is a chlorine or bromine atom, each of X and X1 is a hydrogen or halogen atom or a C1- 5 alkyl, C1- 5 alkoxy, C2- 5 alkenyl, C1- 5 haloalkyl, phenyl, substituted phenyl, C1- 4 acyl, C1- 4 haloacyl, amino, C1- 5 alkylamino, di-(C1- 5 alkyl)amino, C1- 4 acylamino, C1- 4 haloacylamino, C1- 5 alkylsulphonylamino, hydroxy, C1- 5 haloalkoxy, cyano, carboxy, carbamoyl, C1- 5 alkyl-carbamoyl, di-(C1- 5 alkyl)-carbamoyl, C1- 5 alkylmercapto, mercapto, C1- 5 haloalkylmercapto, C1- 5 alkylsulphonyl, C1- 5 haloalkyl-sulphonyl, sulphamoyl, C1- 5 alkylsulphamoyl, or di-(C1- 5 alkyl)sulphamoyl group and in which more than one substituent may be on each benzenoid ring, with the proviso that, in compounds of the Formula I, when X11 is bromine at least one of X and X1 is other than hydrogen, and a process comprising reacting a compound of the formula with phosphorus pentachloride or phosphorus pentabromide to produce a compound of Formula II which may be heated to produce a compound of Formula I or, alternatively, hydrolysed to produce a compound of the formula