2-Fluoroethyl bromide → HCID 17747540, compound

HRID 416018Notes

Reaction equation

HRID 416018 reaction equation
[CH:1]1([N:7]2[CH2:11][CH2:10][CH:9]([CH2:12][C:13]3[C:18]([Cl:19])=[CH:17][C:16]([C:20]4[CH:25]=[CH:24][C:23]([C:26]([N:28]5[CH2:33][CH2:32][NH:31][CH2:30][CH2:29]5)=[O:27])=[CH:22][CH:21]=4)=[CH:15][C:14]=3[Cl:34])[C:8]2=[O:35])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.Br[CH2:37][CH2:38][F:39]>CN(C)C=O.C(OCC)(=O)C>[CH:1]1([N:7]2[CH2:11][CH2:10][CH:9]([CH2:12][C:13]3[C:14]([Cl:34])=[CH:15][C:16]([C:20]4[CH:21]=[CH:22][C:23]([C:26]([N:28]5[CH2:29][CH2:30][N:31]([CH2:37][CH2:38][F:39])[CH2:32][CH2:33]5)=[O:27])=[CH:24][CH:25]=4)=[CH:17][C:18]=3[Cl:19])[C:8]2=[O:35])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

5

Reactant 2

HCID 129822-Fluoroethyl bromideHCID 57741513HCID 57741513, compound

Product 1

HCID 17747540HCID 17747540, compoundYield 64.5%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
55 °C

Procedure

Treat a solution of 1-cyclohexyl-3-[3,5-dichloro-4′-(piperazine-1-carbonyl)-biphenyl-4-ylmethyl]-pyrrolidin-2-one (0.67 g, 1.30 mmol) in dimethylformamide (7 mL) with 1-bromo-2-fluoroethane (0.99 g, 7.80 mmol) and heat to 55° C. for 16 hours under a nitrogen atmosphere. Cool the reaction, dilute with ethyl acetate and wash with saturated aqueous sodium bicarbonate then water. Dry the organic layer with sodium sulfate and purify the crude product by silica gel chromatography using a gradient of 0 to 10% methanol in dichloromethane to afford 0.47 g (64%) of the title compound in its racemic form. Separate into the enantiomers by chiral HPLC (Chiralpak AD 8×33 cm column, isocratic 90:10 3 A ethanol:acetonitrile with 0.2% dimethylethylamine, 400 mL/min, 300 nM UV) to afford 286 mg of Isomer 1 (>99% ee) and 283 mg of Isomer 2 (98.9% ee): MS (m/z): 560. Check the purity of each isomer using chiral HPLC (Chiralpak AD-H 4.6×150 mm column, isocratic 90:10 3A ethanol:acetonitrile with 0.2% dimethylethylamine, 0.6 mL/min, 270 nM).

Workup

  1. temperatureCool
  2. customthe reaction
  3. washwash with saturated aqueous sodium bicarbonate
  4. dry with materialDry the organic layer with sodium sulfate
  5. custompurify the crude product by silica gel chromatography

Sources & evidence

ORD record
ord-a31cfc3b59ed497da3cde267f8911082
Source dataset
uspto-grants-2012_01
Patent number
US08088776B2

Reaction notes

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