Acetone → N-[2-hydroxy-1,1-bis(hydroxymethyl)ethyl]-N'-phenylurea

Participants

Reaction Steps

66.6 g (0.55 mol) of tris(hydroxymethyl)aminomethane are dissolved in 200 ml of distilled water, and 400 ml of acetone are added. 59.6 g (0.5 mol) of phenyl isocyanate are added dropwise, while stirring, whereupon a heavy white precipitate forms. When the addition has ended, the mixture is stirred for a further 2 hours and the precipitate is filtered off with suction. It is then digested successively with in each case 150 ml of water, acetone and diethyl ether. Finally, the compound (11), which is obtained in virtually analytically pure form, is dried at 75° C.

Provenance & Evidence