反应详情

14.0 g of 2-amino-4-methoxy-6-methyl-1,3,5-triazine were suspended in 100 ml of dry acetonitrile, and then 0.1 g of 1,4-diazabicyclo[2,2,2]octane was added thereto. To this mixture was added dropwise a solution of 2.5 g of 2-biphenylylsulfonyl isocyanate in 30 ml of xylene over an hour. During this addition, the reaction was accompanied by slight heat generation, and therefore cooling was applied as necessary. After the addition, the reaction was continued at room temperature for 5 hours and then at 40° C. for 5 hours. After allowing the mixture to cool to room temperature, the precipitated colorless crystals were filtered, washed with ether and dried to obtain 33.9 g of N-2-biphenylylsulfonyl-N'-(4-methoxy-6-methyl-1,3,5-triazin-2-yl) urea; m.pt. 190°-193° C.

1. additionDuring this addition
2. temperaturecooling
3. additionAfter the addition
4. waitat 40° C. for 5 hours
5. filtrationthe precipitated colorless crystals were filtered
6. washwashed with ether
7. customdried