Potassium Carbonate → HCID 90273376, compound

HRID 632467Notes

Reaction equation

HRID 632467 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]2[O:15][C:16]([C:19]3[C:20]([NH2:26])=[N:21][CH:22]=[C:23](Br)[CH:24]=3)=[N:17][N:18]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C([O-])([O-])=O.[K+].[K+].[C:33]1([CH3:42])[CH:38]=[CH:37][C:36](B(O)O)=[CH:35][CH:34]=1>O1CCOCC1.O.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>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]2[O:15][C:16]([C:19]3[C:20]([NH2:26])=[N:21][CH:22]=[C:23]([C:36]4[CH:37]=[CH:38][C:33]([CH3:42])=[CH:34][CH:35]=4)[CH:24]=3)=[N:17][N:18]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 79799Tolylboronic acidHCID 90273397HCID 90273397, compound

Product 1

HCID 90273376HCID 90273376, compound

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of 4-[5-(2-amino-5-bromo-pyridin-3-yl)-[1,3,4]oxadiazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester (500 mg, 1.179 mmol) in dioxane (20 mL) and water (10 mL) were added K2CO3 (488 mg, 3.537 mmol) and 4-tolyl boronic acid (179 mg, 1.297 mmol) in a sealed tube. The reaction mixture was degassed with N2 for 20 min, then Pd(PPh3)4 (136 mg, 0.118 mmol) was added to the reaction mixture at RT, The reaction mixture temperature was raised to 100° C., stirred for 18 h at 100° C. The reaction mixture was diluted with water (30 mL) extracted with ethyl acetate (3×30 mL) and organic layer was washed with brine, dried the organic layer over anhydrous sodium sulphate and concentrated under reduced pressure to affords the crude product. Crude was purified by column chromatography using 100-200 mesh silica gel compound eluted with 35% ethyl acetate in petroleum ether to afford the title compound as a white solid.

Workup

  1. customThe reaction mixture was degassed with N2 for 20 min
  2. extractionextracted with ethyl acetate (3×30 mL) and organic layer
  3. washwas washed with brine
  4. dry with materialdried the organic layer over anhydrous sodium sulphate
  5. concentrationconcentrated under reduced pressure
  6. customto affords the crude product
  7. customCrude was purified by column chromatography
  8. washeluted with 35% ethyl acetate in petroleum ether

Sources & evidence

ORD record
ord-dd591b843683426f961349f93200f561
Source dataset
uspto-grants-2016_04
Patent number
US09321748B2

Reaction notes

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