The tosylation of 2-amino-5-chlorobenzophenone (I) with tosyl chloride (II) in pyridine gives 2-tosylamido-5-chlorobenzophenone (III), which is methylated with dimethyl sulfate and sodium methoxide in toluene yielding N-methyl-2-tosylamido-5-chlorobenzophenone (IV). Hydrolysis of (IV) with aqueous sulfuric acid affords 2-methylamino-5-chlorobenzophenone (V), which is acylated with bromoacetyl chloride (VI) in benzene to give N-methyl-2-(bromoacetylamido)-5-chlorobenzophenone (VII). Finally this compound is condensed with 2-methylallylamine (VIII) in acetone