1,2-Dichlorobenzene → 2-((4-Chlorophenoxy)methyl)-2-imidazoline hydrochloride

Participants

Reaction Conditions

Reaction Steps

A mixture of 25.1 g of 4-chlorophenoxyacetonitrile, 35.0 g of ethylenediamine p-toluenesulfonate and 112.5 ml of 1,2-dichlorobenzene was heated with stirring in a 500 ml round-bottomed three-necked flask at reflux (178° C.) for 1.0 hour. The reaction mixture was cooled, then diluted with methylene chloride and filtered. The crystals that were obtained were dried in a vacuum oven. The dried crystals were slurried in water, the resulting slurry basified and then extracted with methylene chloride. The methylene chloride extract was treated with diatomaceous earth and activated charcoal and then filtered. The methylene chloride was evaporated and 27.4 g of the free imidazoline obtained, m.p. 116°-118° C. The free imidazoline was then put in solution in isopropyl alcohol and acidified with HCl in isopropyl alcohol. The mixture was then cooled and filtered which gave 27.4 g of 2-((4-chlorophenoxy)methyl)-2-imidazoline hydrochloride, m.p. 185°-186° C.

Provenance & Evidence