Ethylene carbonate → 2-[2-(4-Chloro-6-methoxy-pyridin-3-yl)-4-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-imidazol-1-yl]-ethanol

HRID 1629133Notes

Reaction equation

[Cl:1][C:2]1[C:7]([C:8]2[NH:9][CH:10]=[C:11]([C:13]3[N:14]([CH:19]([CH3:21])[CH3:20])[N:15]=[C:16]([CH3:18])[N:17]=3)[N:12]=2)=[CH:6][N:5]=[C:4]([O:22][CH3:23])[CH:3]=1.C1(=O)O[CH2:27][CH2:26][O:25]1>C1(C)C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([O:22][CH3:23])[N:5]=[CH:6][C:7]=1[C:8]1[N:9]([CH2:27][CH2:26][OH:25])[CH:10]=[C:11]([C:13]2[N:14]([CH:19]([CH3:21])[CH3:20])[N:15]=[C:16]([CH3:18])[N:17]=2)[N:12]=1

Participants

Conditions

Temperature: 130 °C

Procedure

A suspension of 4-chloro-5-[4-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-1H-imidazol-2-yl]-2-methoxy-pyridine (5.9 g, 17.7 mmol) in toluene (20 mL) was treated with ethylene carbonate (50 mL) and heated at 130° C. for 2.5 h. The cooled reaction mixture was concentrated in vacuo then diluted with DCM and passed through a pad of silica eluting with DCM then 20% methanol in DCM. Methanolic fractions were combined and concentrated in vacuo and the resultant residue subjected to recrystallisation from acetonitrile to give the title compound as a pale tan solid (2.27 g, 34%). LCMS: RT=2.53 min [M+H]+=377/379. 1H NMR 400 MHz (CDCl3) δ: 8.25 (1H, s), 8.05 (1H, s), 6.92 (1H, s), 5.82-5.80 (1H, m), 4.00 (3H, s), 3.97 (2H, t, J=4.92 Hz), 3.88 (2H, t, J=4.92 Hz), 2.38 (3H, s), 1.48 (6H, d, J=6.63 Hz).

Workup

customThe cooled reaction mixture
concentrationwas concentrated in vacuo
additionthen diluted with DCM
concentrationconcentrated in vacuo
customthe resultant residue subjected to recrystallisation from acetonitrile

Sources & evidence

ORD record: ord-3bc29763c9c342bf96d29b906a9d9bdc
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08785626B2

Reaction notes

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