Potassium Carbonate → (S)-3-(3,6-dihydro-2H-pyran-4-yl)-7-(pyrimidin-5-yl)-5'H-spiro[chromeno[2,3-b]pyridine-5,4'-oxazol]-2'-amine

HRID 1970296Notes

Reaction equation

HRID 1970296 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C@:15]3([CH2:19][O:18][C:17]([NH2:20])=[N:16]3)[C:14]3[C:9](=[CH:10][CH:11]=[C:12]([C:21]4[CH:22]=[N:23][CH:24]=[N:25][CH:26]=4)[CH:13]=3)[O:8][C:5]2=[N:6][CH:7]=1.[O:27]1[CH2:32][CH:31]=[C:30](B2OC(C)(C)C(C)(C)O2)[CH2:29][CH2:28]1.C(=O)([O-])[O-].[K+].[K+]>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1COCC1>[O:27]1[CH2:28][CH:29]=[C:30]([C:2]2[CH:3]=[C:4]3[C@:15]4([CH2:19][O:18][C:17]([NH2:20])=[N:16]4)[C:14]4[C:9](=[CH:10][CH:11]=[C:12]([C:21]5[CH:22]=[N:23][CH:24]=[N:25][CH:26]=5)[CH:13]=4)[O:8][C:5]3=[N:6][CH:7]=2)[CH2:31][CH2:32]1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 112180533,6-Dihydro-2H-pyran-4-boronic acid pinacol esterHCID 67241433(S)-3-bromo-7-(pyrimidin-5-yl)-5'H-spiro[chromeno[2,3-b]pyridine-5,4'-oxazol]-2'-amine

Product 1

HCID 58466129(S)-3-(3,6-dihydro-2H-pyran-4-yl)-7-(pyrimidin-5-yl)-5'H-spiro[chromeno[2,3-b]pyridine-5,4'-oxazol]-2'-amine

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

A vial was charged with (S)-3-bromo-7-(pyrimidin-5-yl)-5′H-spiro[chromeno[2,3-b]pyridine-5,4′-oxazol]-2′-amine (68.1 mg, 0.166 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (105 mg, 0.498 mmol), tetrakis(triphenylphosphine)palladium (19.18 mg, 0.017 mmol), THF (830 μL), and potassium carbonate (415 μL, 0.830 mmol) (as a 2.0 M aq. solution). The vial was sealed and placed in a 110° C. for 5 hours. The layers were separated, and the aqueous layer was extracted with EtOAc (2×). The combined organic extracts were dried over sodium sulfate, filtered, and evaporated. The residue was purified by chromatography on a 25-g SNAP column, eluting with 0-60% of a 90:10:1 mixture of DCM/MeOH/NH4OH in DCM to give (S)-3-(3,6-dihydro-2H-pyran-4-yl)-7-(pyrimidin-5-yl)-5′H-spiro[chromeno[2,3-b]pyridine-5,4′-oxazol]-2′-amine as a white solid

Workup

  1. customThe vial was sealed
  2. customThe layers were separated
  3. extractionthe aqueous layer was extracted with EtOAc (2×)
  4. dry with materialThe combined organic extracts were dried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated
  7. customThe residue was purified by chromatography on a 25-g SNAP column
  8. washeluting with 0-60% of a 90:10:1 mixture of DCM/MeOH/NH4OH in DCM

Sources & evidence

ORD record
ord-40ba01cf675e4f888775945be4c0c34c
Source dataset
uspto-grants-2013_04
Patent number
US08426447B2

Reaction notes

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