反应详情

360 g of hydrazodicarbonamide, 807 g of stearylamine and 1 ml of tin(II)dioctoate are stirred in 1 liter of N-methyl pyrrolidone for 4 hours at 175° C. and for 6 hours at 200° C. A deposit is precipitated on cooling and is filtered off under suction and washed with water, giving 955 g (90% of the theoretical yield) of 4-stearyl-1,2,4-triazolidine-3,5-dione in the form of colourless crystals melting at 118° to 120° C.

1. customA deposit is precipitated
2. temperatureon cooling
3. filtrationis filtered off under suction
4. washwashed with water
5. customgiving 955 g (90% of the