Cesium carbonate → HCID 117840299, compound

HRID 714917Notes

Reaction equation

HRID 714917 reaction equation
[CH:1]1([C:4]2([C:12]#[N:13])[CH:8]([CH2:9][CH3:10])[CH2:7][NH:6][C:5]2=[O:11])[CH2:3][CH2:2]1.[Cl:14][C:15]1[N:20]=[C:19](Cl)[CH:18]=[CH:17][N:16]=1.C(=O)([O-])[O-].[Cs+].[Cs+].C1(P(C2C=CC=CC=2)C2C3OC4C(=CC=CC=4P(C4C=CC=CC=4)C4C=CC=CC=4)C(C)(C)C=3C=CC=2)C=CC=CC=1>O1CCCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Cl:14][C:15]1[N:20]=[C:19]([N:6]2[CH2:7][CH:8]([CH2:9][CH3:10])[C:4]([CH:1]3[CH2:2][CH2:3]3)([C:12]#[N:13])[C:5]2=[O:11])[CH:18]=[CH:17][N:16]=1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 775312,4-DichloropyrimidineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 91618811HCID 91618811, compound

Product 1

HCID 117840299HCID 117840299, compoundYield 26.5%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
85 °C

Procedure

To a mixture of 3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (3.7 g) obtained in Step B of Example 376, 2,4-dichloropyrimidine (3.1 g), cesium carbonate (13 g) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (0.71 g) in tetrahydrofuran (55 mL) was added tris(dibenzylideneacetone)dipalladium(0) (0.38 g), and the mixture was stirred overnight at 85° C. The insoluble substance was removed by filtration through Celite, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to give (3SR,4RS)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (1.3 g) and (3SR,4SR)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (1.6 g). (3SR,4RS)-1-(2-Chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (1.3 g) was resolved by HPLC (column: CHIRALCEL OD, 50 mmID×500 mmL, manufactured by Daicel Chemical Industries, mobile phase: hexane/2-propanol=700/300) to give (3S,4R)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (500 mg) having a shorter retention time and (3R,4S)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (510 mg) having a longer retention time. (3SR,4SR)-1-(2-Chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (1.6 g) was resolved by HPLC (column: CHIRALCEL OD, 50 mmID×500 mmL, manufactured by Daicel Chemical Industries, mobile phase: hexane/2-propanol=700/300) to give (3S,4S)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (560 mg) having a shorter retention time and (3R,4R)-1-(2-chloropyrimidin-4-yl)-3-cyclopropyl-4-ethyl-2-oxopyrrolidine-3-carbonitrile (600 mg) having a longer retention time.

Workup

  1. customThe insoluble substance was removed by filtration through Celite
  2. customthe solvent was evaporated under reduced pressure
  3. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-fe682afcbbca44f8946fa638b285eefb
Source dataset
uspto-grants-2015_11
Patent number
US09187453B2

Reaction notes

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