Methyl iodide → Tert-butyl 3-(3,4-difluorophenyl)-3-methoxypyrrolidin-1-carboxylate

HRID 575974Notes

Reaction equation

HRID 575974 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][C:10]([C:14]2[CH:19]=[CH:18][C:17]([F:20])=[C:16]([F:21])[CH:15]=2)([OH:13])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].I[CH3:25]>O1CCCC1>[F:21][C:16]1[CH:15]=[C:14]([C:10]2([O:13][CH3:25])[CH2:11][CH2:12][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:2])[CH3:3])=[O:7])[CH2:9]2)[CH:19]=[CH:18][C:17]=1[F:20]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 67405004Tert-butyl 3-(3,4-difluorophenyl)-3-hydroxypyrrolidine-1-carboxylate

Product 1

HCID 67402962Tert-butyl 3-(3,4-difluorophenyl)-3-methoxypyrrolidin-1-carboxylateYield 77%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Preparation according to Preparation 2. Tert-butyl-3-(3,4-difluorophenyl)-3-hydroxypyrrolidin-1-carboxylate (3.3 g, 11 mmol) in dry tetrahydrofuran (50 mL), sodium hydride (60% dispersion in mineral oil, 0.66 g, 16.5 mmol), iodomethane (1.37 mL, 22 mmol). Purification by flash column chromatography on silica gel (ethyl acetate/isooctane, 1:9 to 1:1) gave the title compound (2.65 g, 77%). MS m/z (rel. intensity, 70 eV) 257 (17), 240 (14), 171 (13), 127 (15), 57 (bp).

Workup

  1. customPreparation
  2. customaccording to Preparation 2
  3. customPurification by flash column chromatography on silica gel (ethyl acetate/isooctane, 1:9 to 1:1)

Sources & evidence

ORD record
ord-dc2e41bf51264fe08f392c98a50b6264
Source dataset
uspto-grants-2015_05
Patent number
US09035073B2

Reaction notes

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