alkyl phenyl halogen nitro trifluoromethyl or c 1 c 4 alkoxy preferably with a 48 percent solution of hydrobromic acid other hydrolyzing agents such as boron tribromide aluminum trichloride and trimethylsilyl iodide in methylene chloride are also suitable temperatures for the hydrolysis reaction may range from about 60 u00b0 c to room temperature with room temperature being preferred compounds of the invention having the formula ic wherein r 4 is hydrogen nitrile c 1 c 4 alkyl phenyl halogen nitro trifluoromethyl or c 1 c 4 alkoxy may be prepared by reacting a compound of the formula iia wherein r 4 is hydrogen nitrile c 1 c 4 alkyl phenyl halogen nitro trifluoromethyl or c 1 c 4 alkoxy with a compound of the formula r 5 n c y in the presence of a catalytic base such as sodium hydride or sodium in an aprotic solvent such as dry tetrahydrofuran dry ether benzene or toluene the reaction is preferably carried out at room temperature with temperatures from about 0 u00b0 c to 40 u00b0 c being acceptable the preferred solvent is dry tetrahydrofuran and the preferred catalyst is sodium hydride compounds of the invention having the formula id wherein r 4 is hydrogen nitrile c 1 c 4 alkyl phenyl halogen nitro trifluoromethyl or c 1 c 4 alkoxy may be prepared by reacting a compound of the formula iia wherein.