1-Bromo-2-methylpropane → HCID 25143957, compound

HRID 1931834Notes

Reaction equation

HRID 1931834 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([C:9]2([OH:14])[CH2:13][CH2:12][NH:11][CH2:10]2)[CH:5]=[C:6]([F:8])[CH:7]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:22][CH:23]([CH3:25])[CH3:24].C(=O)([O-])[O-].[Na+].[Na+]>C(#N)C>[F:1][C:2]1[CH:3]=[C:4]([C:9]2([OH:14])[CH2:13][CH2:12][N:11]([CH2:22][CH:23]([CH3:25])[CH3:24])[CH2:10]2)[CH:5]=[C:6]([F:8])[CH:7]=1

Participants

6

Reactant 4

HCID 65551-Bromo-2-methylpropaneHCID 10340Sodium CarbonateHCID 11430Potassium CarbonateHCID 63585886HCID 63585886, compound

Product 1

HCID 25143957HCID 25143957, compoundYield 52.1%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

In a sealed tube a mixture of enantiomer E2 of 3-(3,5-difluorophenyl)pyrrolidin-3-ol (0.28 g, 1.45 mmol), acetonitrile (15 mL), potassium carbonate (0.4 g, 2.9 mmol) and 1-bromo-2-methylpropane (0.15 mL, 1.59 mmol) was stirred at ambient temperature for 5 h and then at 60° C. for 2 h. Aqueous sodium carbonate (10%, 5 mL) was added and the aqueous phase was extracted with ethyl acetate (2×50 mL). The combined organic phase was dried (Na2SO4) and evaporated. Purification by flash chromatography on silica gel (ethyl acetate/methanol, 10:1) gave the title compound (0.193 g). [α]D=−22.9° (methanol). The amine was converted to the oxalic acid salt and recrystallized from ethanol/diisopropyl ether: M.p. 162-163° C.; MS m/z (relative intensity, 70 eV) 255 (M+, 2), 212 (bp), 182 (46), 213 (13), 57 (10), 127 (10).

Workup

  1. waitat 60° C. for 2 h
  2. extractionthe aqueous phase was extracted with ethyl acetate (2×50 mL)
  3. dry with materialThe combined organic phase was dried (Na2SO4)
  4. customevaporated
  5. customPurification by flash chromatography on silica gel (ethyl acetate/methanol, 10:1)

Sources & evidence

ORD record
ord-cf0ea79ab92f4e62beda5e29e3ffe12e
Source dataset
uspto-grants-2012_05
Patent number
US08188301B2

Reaction notes

Loading…