white precipitate was filtered 450 mg and then recrystallized from ethanol ether to give 350 mg 18 of 2 2 aminoethylthio 1 3 5 difluorobenzyl imidazole dihydrochloride mp 201 u00b0 202 u00b0 c the procedure of example 1 wherein 1 3 5 difluorobenzyl 2 mercaptoimidazole is replaced by 1 4 chlorophenyl 2 mercaptoimidazole yields 2 2 aminoethylthio 1 4 chlorophenyl imidazole the example 1 process wherein 1 3 4 difluorobenzyl 2 mercaptoimidazole is replaced by 1 4 methoxybenzyl 2 mercaptoimidazole yields 1 2 aminoethylthio 1 4 methoxybenzyl imidazole treatment of this compound in methylene chloride with boron tribromide yields 2 2 aminoethylthio 1 4 hydroxybenzyl imidazole the example 1 process wherein 1 3 5 difluorobenzyl 2 mercaptoimidazole is replaced by 1 phenylethyl 2 mercaptoimidazole yields 2 2 aminoethylthio 1 phenylethyl imidazole a solution of 10 g 0 06 mole of p methoxyphenyl isothiocyanate in 100 ml of chloroform was treated with 6 3 g 0 06 mole of aminoacetaldehyde dimethyl acetal the solvent was evaporated and the residue was recrystallized from ethanol to yield n p methoxyphenyl n 39 u03b2 u03b2 dimethoxyethyl thiourea 9 2 g 57 a suspension of this thiourea in a solution of 5 ml of concentrated sulfuric acid and 20 ml of water was refluxed for 3 hours the mixture was cooled and a solid was filtered washed with water and dried recrystallization from ethanol gave 1 4 methoxyphenyl 2 mercaptoimidazole 4 9 g 70 mp 215 u00b0 217 u00b0 c the example 1 procedure wherein.