Potassium Phosphate, Tribasic → HCID 67959693, compound

HRID 1529382Notes

Reaction equation

HRID 1529382 reaction equation
[CH:1]1([C:4]2[N:9]=[C:8]([C:10]3[CH:11]=[C:12]4[C:16](=[CH:17][CH:18]=3)[N:15]([S:19]([C:22]3[CH:28]=[CH:27][C:25]([CH3:26])=[CH:24][CH:23]=3)(=[O:21])=[O:20])[CH:14]=[C:13]4B3OC(C)(C)C(C)(C)O3)[CH:7]=[N:6][CH:5]=2)[CH2:3][CH2:2]1.Br[C:39]1[CH:44]=[N:43][CH:42]=[C:41]([CH:45]2[CH2:47][CH2:46]2)[N:40]=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(CCC)=CC(CCC)=CC=2CCC)CCCCC1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>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.C(Cl)(Cl)Cl.[Pd].[Pd]>[CH:45]1([C:41]2[N:40]=[C:39]([C:13]3[C:12]4[C:16](=[CH:17][CH:18]=[C:10]([C:8]5[CH:7]=[N:6][CH:5]=[C:4]([CH:1]6[CH2:2][CH2:3]6)[N:9]=5)[CH:11]=4)[N:15]([S:19]([C:22]4[CH:23]=[CH:24][C:25]([CH3:26])=[CH:27][CH:28]=4)(=[O:20])=[O:21])[CH:14]=3)[CH:44]=[N:43][CH:42]=2)[CH2:47][CH2:46]1

Participants

6

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 21081571Dicyclohexyl(2',4',6'-tripropyl-[1,1'-biphenyl]-2-yl)phosphineHCID 457883052-Bromo-6-cyclopropylpyrazineHCID 67959644HCID 67959644, compound

Product 1

HCID 67959693HCID 67959693, compoundYield 43%

Reagents, catalysts & solvents 1

HCID 11029508Palladium, tris[mu-[(1,2-eta:4,5-eta)-(1E,4E)-1,5-diphenyl-1,4-pentadien-3-one]]di-, compd. with trichloromethane (1:1)Catalyst

Conditions

Temperature
130 °C

Procedure

A glass microwave reaction vessel was charged with 5-(6-cyclopropylpyrazin-2-yl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indole (172 mg, 0.33 mmol), 2-bromo-6-cyclopropylpyrazine (80 mg, 0.40 mmol, Combi-Phos Catalysis Inc.), Pd2(dba)3 CHCl3 adduct (10 mg, 10.0 μmol), 2-(dicyclohexylphosphino)-2′,4′,6′-tri-1-propyl-1,1′-biphenyl (X-Phos) (10 mg, 0.020 mmol) and K3PO4 (213 mg, 1.00 mmol). The tube was sealed. The tube was evacuated under vacuum and back-filled with N2 (3×). Dioxane (1.9 mL) and water (0.18 mL) were added. The reaction was stirred and heated in a Initiator microwave reactor (Personal Chemistry, Biotage AB, Inc., Upssala, Sweden) at 130° C. for 20 min. Water was added and the mixture was extracted with EtOAc (3×). The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated. The crude was purified by silica gel chromatography, eluting with a gradient of 0-50% EtOAc in hexanes, to provide 3,5-bis(6-cyclopropylpyrazin-2-yl)-1-tosyl-1H-indole (72 mg, 0.14 mmol, 43% yield) as a red oil. MS (ESI, pos. ion) m/z: 508.1 (M+1).

Workup

  1. customA glass microwave reaction vessel
  2. customThe tube was sealed
  3. customThe tube was evacuated under vacuum
  4. additionback-filled with N2 (3×)
  5. additionDioxane (1.9 mL) and water (0.18 mL) were added
  6. additionWater was added
  7. extractionthe mixture was extracted with EtOAc (3×)
  8. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  9. filtrationfiltered
  10. concentrationconcentrated
  11. customThe crude was purified by silica gel chromatography
  12. washeluting with a gradient of 0-50% EtOAc in hexanes

Sources & evidence

ORD record
ord-a644577f2a3341bf814fe26b494e2de0
Source dataset
uspto-grants-2015_07
Patent number
US09090593B2

Reaction notes

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