反应详情

1-methyl-1-(1,2,2,2-tetrachloroethyl)-3-(3,4-dichlorophenyl)urea (7.7 g, 0.02 mol) was dissolved in 200 ml dimethoxyethane, followed by addition of 1.5 g (0.02 mol) of ammonium thiocyanate. The mixture was stirred for 2 hours, filtered and stripped of solvent. Ether was added to the residue, which was again filtered to remove a small amount of solid. The remaining solvent was then removed, leaving a dark oil which solidified upon standing. This material had a melting point of 142°-146° C. The infrared spectrum of the material showed a broad absorption band at 4.9 micron (for the --N=C=S group). Elemental analysis showed: %Cl, calc., 43.6, found 36.7; %S, calc. 7.9, found 6.3.

1. filtrationfiltered
2. additionEther was added to the residue, which
3. filtrationwas again filtered
4. customto remove a small amount of solid
5. customThe remaining solvent was then removed
6. customleaving a dark oil which