Acetic Acid → HCID 53657667, compound

HRID 1699625Notes

Reaction equation

C(O)(=O)C.[N:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[CH2:11][NH:12][C:13](=[O:35])[C:14]1[CH:19]=[CH:18][C:17]([NH:20][C:21](=O)[CH3:22])=[C:16]([NH:24][CH2:25][C:26]2[CH:31]=[CH:30][C:29]3[O:32][CH2:33][O:34][C:28]=3[CH:27]=2)[CH:15]=1>C(O)C>[CH3:22][C:21]1[N:24]([CH2:25][C:26]2[CH:31]=[CH:30][C:29]3[O:32][CH2:33][O:34][C:28]=3[CH:27]=2)[C:16]2[CH:15]=[C:14]([C:13](=[O:35])[NH:12][CH2:11][C:6]3[CH:7]=[CH:8][CH:9]=[CH:10][N:5]=3)[CH:19]=[CH:18][C:17]=2[N:20]=1

Participants

Conditions

Temperature: 70 °C

Procedure

Acetic acid (2 ml) and ethanol (5 ml) are added to an N-(2-pyridylmethyl)-4-acetylamino-3-(3,4-methylenedioxybenzylamino)benzamide (0.490 g) and the solution is stirred for eight hours at 70° C. The residue obtained by reduced pressure condensation is purified using silica gel column chromatography (eluate: ethyl acetate/methanol=9/1), and crystallization is performed in ethyl acetate. The crystals are separated through filtration, dried and thus, 2-methyl-1-(3,4-methylenedioxybenzyl)-6-[(2-pyridylmethyl)carbamoyl]benzimidazole (0.270 g) is obtained. 1H-NMR (CDCl3, δ): 2.59 (3H, s), 4.78 (2H, d, J=4.8 Hz), 5.28 (2H, s), 5.93 (2H, s), 6.51 (1H, d, J=1.6 Hz), 6.55 (1H, dd, J=1.4 and 7.9 Hz), 6.72 (2H, d, J=8.0 Hz), 7.22 (1H, dd, J=6.7 and 5.0 Hz), 7.34 (1H, d, J=7.7 Hz), 7.62 (1H, br t), 7.67-7.75 (3H, m), 7.96 (1H, d, J=1.1 Hz), 8.58 (1H, d, J=4.9 Hz).

Workup

customThe residue obtained by reduced pressure condensation
customis purified
customsilica gel column chromatography (eluate: ethyl acetate/methanol=9/1), and crystallization
customThe crystals are separated through filtration
customdried

Sources & evidence

ORD record: ord-cf0bab68a44d4e03a121ef67d7d161bc
Source dataset: uspto-grants-2002_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06348032B1

Reaction notes

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