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A 21.5 g (0.25 mole) portion of 2-imidazolidinone in 300 ml of dimethylsulfoxide was treated with 34.5 g (0.25 mole) of potassium carbonate, 10 g (0.06 mole) of potassium iodide and 40.5 g (0.25 mole) of 4-chlorobenzyl chloride. The reaction mixture was heated to 100° over 0.3 hours, held at 100° with rapid stirring for 1.3 hours and poured into 1.3 l of water. The aqueous mixture was extracted with 1.3 l of chloroform. The chloroform extract was washed with 150 ml of water, dried over magnesium sulfate for 3 hours and filtered. The filtrate was concentrated to dryness to give 49 g (92%) a light yellow oil which crystallized.

1. temperatureThe reaction mixture was heated to 100° over 0.3 hours
2. customheld at 100°
3. extractionThe aqueous mixture was extracted with 1.3 l of chloroform
4. extractionThe chloroform extract
5. washwas washed with 150 ml of water
6. dry with materialdried over magnesium sulfate for 3 hours
7. filtrationfiltered
8. concentrationThe filtrate was concentrated to dryness