Cesium carbonate → HCID 118078898, compound

HRID 1485722Notes

Reaction equation

HRID 1485722 reaction equation
Br[C:2]1[CH:11]=[C:10]2[C:5]([N:6](C(=O)C(F)(F)F)[C@@H:7]([CH3:20])[CH2:8][N:9]2[C:12]([O:14][CH:15]2[CH2:19][CH2:18][CH2:17][CH2:16]2)=[O:13])=[CH:4][CH:3]=1.[CH:27]1([N:30]2[CH:34]=[C:33](B3OC(C)(C)C(C)(C)O3)[CH:32]=[N:31]2)[CH2:29][CH2:28]1.CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.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]>[CH:27]1([N:30]2[CH:34]=[C:33]([C:2]3[CH:11]=[C:10]4[C:5]([NH:6][C@@H:7]([CH3:20])[CH2:8][N:9]4[C:12]([O:14][CH:15]4[CH2:16][CH2:17][CH2:18][CH2:19]4)=[O:13])=[CH:4][CH:3]=3)[CH:32]=[N:31]2)[CH2:29][CH2:28]1

Participants

8

Reactant 4

HCID 10796Cesium carbonateHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 593271331-Cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 118080010HCID 118080010, compound

Product 1

HCID 118078898HCID 118078898, compoundYield 59%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of (S)-cyclopentyl 7-bromo-3-methyl-4-(2,2,2-trifluoroacetyl)-3,4-dihydroquinoxaline-1(2H)-carboxylate (0.250 g, 0.574 mmol), 1-cyclopropyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (0.148 g, 0.632 mmol), tris(dibenzylideneacetone)dipalladium (0.026 g, 0.029 mmol), X-Phos (0.027 g, 0.057 mmol) and cesium carbonate (0.561 g, 1.723 mmol) in 1,4-dioxane (5.0 mL) and water (1.0 mL) was heated at 100° C. for 17 h. The reaction mixture was filtered through Celite and concentrated to afford an orange oil. This material was purified via column chromatography on silica gel (Biotage 25 g column, gradient elution with 25-100% ethyl acetate-hexane) to afford (S)-cyclopentyl 7-(1-cyclopropyl-1H-pyrazol-4-yl)-3-methyl-3,4-dihydroquinoxaline-1(2H)-carboxylate (0.124 g, 59%) as a yellow solid. MS (ESI, pos. ion) m/z 367 [M+1]+.

Workup

  1. filtrationThe reaction mixture was filtered through Celite
  2. concentrationconcentrated
  3. customto afford an orange oil
  4. customThis material was purified via column chromatography on silica gel (Biotage 25 g column, gradient elution with 25-100% ethyl acetate-hexane)

Sources & evidence

ORD record
ord-f37e0a5bcee343b7bfa3d72c190e023c
Source dataset
uspto-grants-2016_08
Patent number
US09422281B2

Reaction notes

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