Hydrogen Peroxide → 1-[(2,3-dichlorophenyl)methyl]-2-methyl-6-(4-morpholinyl)-1H-benzimidazole-4-carboxamide

HRID 44491Notes

Reaction equation

[OH-:1].[K+].[Cl:3][C:4]1[C:9]([Cl:10])=[CH:8][CH:7]=[CH:6][C:5]=1[CH2:11][N:12]1[C:16]2[CH:17]=[C:18]([N:23]3[CH2:28][CH2:27][O:26][CH2:25][CH2:24]3)[CH:19]=[C:20]([C:21]#[N:22])[C:15]=2[N:14]=[C:13]1[CH3:29].OO>O.C1COCC1>[Cl:3][C:4]1[C:9]([Cl:10])=[CH:8][CH:7]=[CH:6][C:5]=1[CH2:11][N:12]1[C:16]2[CH:17]=[C:18]([N:23]3[CH2:24][CH2:25][O:26][CH2:27][CH2:28]3)[CH:19]=[C:20]([C:21]([NH2:22])=[O:1])[C:15]=2[N:14]=[C:13]1[CH3:29]

Participants

Conditions

Temperature: 50 °C

Procedure

A solution of KOH (78 mg, 1.4 mmol) in water (10 mL) was added dropwise to solution of 1-[(2,3-dichlorophenyl)methyl]-2-methyl-6-(4-morpholinyl)-1H-benzimidazole-4-carbonitrile (280 mg, 0.7 mmol) and 30% H2O2 (3 mL) in THF (10 mL) at rt. The mixture was heated at 50° C. for 2 h. When TLC showed no starting material left, the pH of the mixture was acidified to pH ca. 5 and extracted with EtOAc (50 mL×3). The organic layer was washed with brine, dried over MgSO4, concentrated. The resulting residue was purified by silica gel chromatography eluted with EtOAc to give the product (150 mg, 51%), as a white solid. 1H NMR (300 Mhz, DMSO-d6) δ ppm 2.44 (s, 3H), 3.11 (t, 4H, J=4.8 Hz), 3.71 (t, 4H, J=4.8 Hz), 5.60 (s, 2H), 6.31 (d, 1H, J=8.1 Hz), 7.16 (br s, 2H), 7.25 (t, 1H, J=8.1 Hz), 7.35 (d, 1H, J=1.8 Hz), 7.41 (d, 1H, J=1.8 Hz), 7.60 (d, 1H, J=8.1 Hz); LC-MS: m/e=419 [M+1]+

Workup

waitleft
extractionextracted with EtOAc (50 mL×3)
washThe organic layer was washed with brine
dry with materialdried over MgSO4
concentrationconcentrated
customThe resulting residue was purified by silica gel chromatography
washeluted with EtOAc

Sources & evidence

ORD record: ord-14527f1f18e44baf8a800fb929cade17
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08541411B2

Reaction notes

Loading…