[Br:1][C:2]1[CH:16]=[CH:15][C:5]2[N:6]=[C:7]([NH:9][C:10]([NH:12][CH2:13][CH3:14])=[O:11])[S:8][C:4]=2[CH:3]=1.CN.C=O.[CH3:21][N:22]1[CH2:27]COC[CH2:23]1>O.C(O)C>[Br:1][C:2]1[CH:16]=[CH:15][C:5]2[N:6]=[C:7]([N:9]3[CH2:23][N:22]([CH3:27])[CH2:21][N:12]([CH2:13][CH3:14])[C:10]3=[O:11])[S:8][C:4]=2[CH:3]=1A mixture of 1-(6-bromo-2-benzothiazolyl)-3-ethylurea, methylamine, formaldehyde, and N-methyl morpholine in a mixed solvent of ethanol and water was reacted to give the desired compound 1.56 g (88%).
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