Ten dibenzamides I (R, R3, R4 = H, Cl; R1 = H, Cl NO2; R2 = H, Et, Ph, NMe2, Cl) were prepd. by reaction of II with SO3. Thus, 16.0 g PhCN in CH2Cl2 was added to 12.5 g SO3 in CH2Cl2 at 5-10°, the mixt. stirred 1 h at room temp., and let stand 16 h to give 15.4 g I (R = R1 = R2 = R3 = R4 = H).
Patent Information
Patent No. PatentPak Options Kind Language Date Application No. Date
JP 51136632 A Nov 26, 1976 JP 1975-59568 May 21, 1975
JP 58008388 B Feb 15, 1983，
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酸加醋酐做成酸酐，蒸掉乙酸，再与氨气酰胺化。
Ten dibenzamides I (R, R3, R4 = H, Cl; R1 = H, Cl NO2; R2 = H, Et, Ph, NMe2, Cl) were prepd. by reaction of II with SO3. Thus, 16.0 g PhCN in CH2Cl2 was added to 12.5 g SO3 in CH2Cl2 at 5-10°, the mixt. stirred 1 h at room temp., and let stand 16 h to give 15.4 g I (R = R1 = R2 = R3 = R4 = H).
Patent Information
Patent No. PatentPak Options Kind Language Date Application No. Date
JP 51136632 A Nov 26, 1976 JP 1975-59568 May 21, 1975
JP 58008388 B Feb 15, 1983，