Acetic Acid → HCID 178502062, compound

Reaction equation

[C:1]1([CH2:7][N:8]2[CH2:13][CH2:12][CH:11]([NH:14][C:15]3[C:16]([NH2:21])=[CH:17][CH:18]=[CH:19][CH:20]=3)[CH2:10][CH2:9]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.N=CO[CH2:25][NH:26][C:27](=[O:30])[O:28][CH3:29].C(O)(=O)C>ClC(Cl)Cl>[C:1]1([CH2:7][N:8]2[CH2:13][CH2:12][CH:11]([N:14]3[C:15]4[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=4[NH:21][C:25]3=[N:26][C:27](=[O:30])[O:28][CH3:29])[CH2:10][CH2:9]2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

Procedure

A mixture of 5 parts of N-[1-(phenylmethyl)-4-piperidinyl]-1,2-benzenediamine, 2.35 parts of methyl (iminomethoxymethyl)carbamate, 5 parts of acetic acid and 75 parts of trichloromethane is stirred and refluxed for 48 hours. The reaction mixture is evaporated and the residue is taken up in water. The solution is neutralized with ammonium hydroxide solution. The precipitated product is purified by column-chromatography over silica gel using a mixture of trichloromethane and methanol (95:5 by volume) as eluent. The pure fractions are collected and the eluent is evaporated, yielding 1.75 parts of methyl {1,3-dihydro-1-[1-(phenylmethyl)-4-piperidinyl]-2H-benzimidazol-2-ylidene}carbamate; mp. 169.7° C.