[N+:1]([C:4]1[CH:10]=[C:9]([N+:11]([O-])=O)[CH:8]=[C:7]([Cl:14])[C:5]=1[NH2:6])([O-])=O.[Se].[OH2:16].[CH2:17](N(CC)CC)C>O1CCCC1>[Cl:14][C:7]1[C:5]2[C:4](=[N:1][C:17](=[O:16])[N:6]=2)[CH:10]=[C:9]([NH2:11])[CH:8]=12,4-Dinitro-6-chloroaniline 2.7 g (12.5 m moles), selenium 1.98 g (25.0 m moles), water 1.6 ml (89 m moles), triethylamine 5.0 g (50 m moles) and tetrahydrofuran 100 ml were placed in a 200-ml capacity autoclave, and stirred at a temperature of 80° C. for five hours under carbon monoxide of 20 Kg/cm2. The reaction mixture obtained was worked up in the same manner as in EXAMPLE 1, to provide 4-chloro-6 -aminobenzimidazolone in 84% yield.
Wird geladen…
