N,N-dimethylformamide N,N-dimethylacetamide → 1,3,5-Triazin-2(1H)-one, 1-(2,6-dimethylphenyl)-4-(methylamino)-

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About 200 mg of 1-(2,6-dimethylphenyl)-3-methylamidinourea hydrochloride was introduced in a gas chromatograph hypo vial and dissolved in 1 ml of acetonitrile. To the solution was added 0.2 ml of DMF DMA reagent. The vial was sealed with crimper and heated at 105° C. for 15 minutes in an oven. Seven vials were made. The contents of the vials were then put into a long-neck round bottom flask and evaporated to dryness by a flask evaporator. The solid mass was dissolved in a mixture of 30 ml of CHCl3 and 20 ml of water and shaken vigorously in a 60 ml separatory funnel. The aqueous layer was discarded and 20 ml of water was added and shaken. The CHCl3 layer was then taken and about 10 g of anhydrous Na2SO4 was added, the CHCl3 solution was decanted into a flask and evaporated to dryness. The solid material was dissolved in 2-pentanone (about 80 ml) at 70° C. The solution was concentrated and crystallized upon cooling. The crystals were collected and dried in a desiccator with P2O5 with vacuum for one hour.

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