[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)=[C:6]([NH:8][C:9]([NH2:11])=S)[CH:7]=1.O.O.O.C([O-])(=O)C.[Pb+2].C([O-])(=O)C.[OH-].[K+]>O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)=[C:6]([NH:8][C:9]#[N:11])[CH:7]=1A mixture of 1-(5-chloro-2-morpholinophenyl) thiourea (5.97 g) suspended in water (40 ml), lead acetate trihydrate (8.75 g) in water (40 ml) and potassium hydroxide (12.6 g) in water (35 ml) was heated under reflux for 15 minutes to give N-(5-chloro-2-morpholinophenyl)cyanamide as a white solid (m.p. 305°-308° C.).
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