Hydrochloric Acid → 3-Methyl-4-(2-piperazin-1-yl-ethoxy)-benzoic Acid Methyl Ester Dihydrochloride
Reaction equation
C(OC([N:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][O:16][C:17]2[CH:22]=[CH:21][C:20]([C:23]([O:25][CH3:26])=[O:24])=[CH:19][C:18]=2[CH3:27])[CH2:10][CH2:9]1)=O)(C)(C)C.[ClH:28]>O1CCOCC1>[ClH:28].[ClH:28].[CH3:26][O:25][C:23](=[O:24])[C:20]1[CH:21]=[CH:22][C:17]([O:16][CH2:15][CH2:14][N:11]2[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]2)=[C:18]([CH3:27])[CH:19]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
4-[2-(4-Methoxycarbonyl-2-methyl-phenoxy)-ethyl]-piperazine-1-carboxylic acid tert-butyl ester from Example E40.1 (200 mg, 0.53 mmol) was dissolved in 4M HCl solution in dioxan (5 ml). The mixture was stirred for 30 min at room temperature, concentrated in vacuo and azeotroped with toluene to yield the title compound (185 mg, 100%).