Diisopropylethylamine → (R)-3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl N-methyl-N-(4-trifluoromethoxybenzyl)carbamate

HRID 856183Notes

Reaction equation

[Cl:1][C:2]1[N:3]([CH2:10][C@:11]([OH:15])([CH3:14])[CH2:12][OH:13])[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=1.C(N(CC)C(C)C)(C)C.[CH3:25][N:26]([CH2:30][C:31]1[CH:36]=[CH:35][C:34]([O:37][C:38]([F:41])([F:40])[F:39])=[CH:33][CH:32]=1)[C:27](Cl)=[O:28]>CN(C)C1C=CN=CC=1.C1(C)C=CC=CC=1.C(OCC)(=O)C>[CH3:25][N:26]([CH2:30][C:31]1[CH:32]=[CH:33][C:34]([O:37][C:38]([F:39])([F:40])[F:41])=[CH:35][CH:36]=1)[C:27](=[O:28])[O:13][CH2:12][C@@:11]([OH:15])([CH3:14])[CH2:10][N:3]1[CH:4]=[C:5]([N+:7]([O-:9])=[O:8])[N:6]=[C:2]1[Cl:1]

Participants

Conditions

Temperature: 100 °C

Procedure

(R)-2-Chloro-1-(2,3-dihydroxy-2-methylpropyl)-4-nitroimidazole prepared in Example 10 (2.16 g, 9.18 mmol), N,N-diisopropylethylamine (2.67 ml, 15.30 mmol) and 4-dimethylaminopyridine (0.19 g, 1.53 mmol) were added to a suspension of N-methyl-N-(4-trifluoromethoxybenzyl)carbamoylchloride (2.05 g, 7.65 mmol) in toluene (40 ml) followed by stirring at 100° C. for 3.5 hours. The reaction mixture was diluted with ethyl acetate, and the solution washed with 10% hydrochloric acid, dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (methylene chloride/ethyl acetate=9/1) to afford (R)-3-(2-chloro-4-nitroimidazol-1-yl)-2-hydroxy-2-methylpropyl N-methyl-N-(4-trifluoromethoxybenzyl)carbamate (2.74 g, yield 77%) as a colorless oil.

Workup

washthe solution washed with 10% hydrochloric acid
dry with materialdried over magnesium sulfate
concentrationconcentrated under reduced pressure
customThe residue was purified by silica gel column chromatography (methylene chloride/ethyl acetate=9/1)

Sources & evidence

ORD record: ord-391eff9df4e3470e8ef2af8594aa39c4
Source dataset: uspto-grants-2007_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07262212B2

Reaction notes

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