Ethyl 2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]benzoate → 2-Ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)benzaldehyde
Reaction equation
[CH2:1]([O:3][C:4]1[CH:14]=[CH:13][C:12]([S:15]([N:18]2[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]2)(=[O:17])=[O:16])=[CH:11][C:5]=1[C:6](OCC)=[O:7])[CH3:2]>O=[Mn]=O>[CH2:1]([O:3][C:4]1[CH:14]=[CH:13][C:12]([S:15]([N:18]2[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]2)(=[O:16])=[O:17])=[CH:11][C:5]=1[CH:6]=[O:7])[CH3:2]Participants
3
Reactant 1
Product 1
Reagents, catalysts & solvents 1
Procedure
MnO2 (100 g, 1.15 mol) was loaded into a flask, followed by 1-(4-ethoxy-3-hydroxymethylphenylsulfonyl)-4-methylpiperazine (15 g, 0.05 mol, from step (b) above). This was washed with acetone (150 mL) and the suspension stirred for 3 hours. The MnO2 was filtered off onto Celite® and the filtrate concentrated under vacuum to give a pale yellow oil. This was recrystallised from toluene to give the title compound as a pale green solid (7.4 g, 47%).