Piperazine → 5-(2-Piperazin-1-ylethyl)-2,1,3-benzoxadiazole
Reaction equation
CS(O[CH2:6][CH2:7][C:8]1[CH:9]=[CH:10][C:11]2[C:12]([CH:16]=1)=[N:13][O:14][N:15]=2)(=O)=O.[NH:17]1[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]1>CN(C=O)C>[N:15]1[O:14][N:13]=[C:12]2[CH:16]=[C:8]([CH2:7][CH2:6][N:17]3[CH2:22][CH2:21][NH:20][CH2:19][CH2:18]3)[CH:9]=[CH:10][C:11]=12Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
5-[2-(Methanesulfonyloxy)ethyl]benzofurazan (242 mg, 1 mmol) and piperazine (0.86 g, 10 mmol) in DMF (9 ml) were stirred together at room temperature for 19 hours. The solvent was evaporated under reduced pressure and the residue was purified by flash column chromatography on silica gel eluting with CH2Cl2 /CH3OH/NH3 (Aq.); 90:10:1 to give the piperazine as a yellow solid (225 mg, 97%).