Potassium Carbonate → 5-[4-(Pyrimidin-5-yloxy)phenyl]-N-[3-chloro-phenyl]-1,3,4-oxadiazol-2-amine

HRID 661428Notes

Reaction equation

HRID 661428 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([NH:8][C:9]2[O:13][C:12]([C:14]3[CH:19]=[CH:18][C:17]([OH:20])=[CH:16][CH:15]=3)=[N:11][N:10]=2)[CH:5]=[CH:6][CH:7]=1.C[Si]([N-][Si](C)(C)C)(C)C.[K+].Br[C:32]1[CH:33]=[N:34][CH:35]=[N:36][CH:37]=1.C([O-])([O-])=O.[K+].[K+]>CN(C=O)C.CO>[N:34]1[CH:33]=[C:32]([O:20][C:17]2[CH:18]=[CH:19][C:14]([C:12]3[O:13][C:9]([NH:8][C:4]4[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[CH:3]=4)=[N:10][N:11]=3)=[CH:15][CH:16]=2)[CH:37]=[N:36][CH:35]=1

Participants

7

Reactant 4

HCID 11430Potassium CarbonateHCID 783445-BromopyrimidineHCID 3251421Potassium bis(trimethylsilyl)amideHCID 1361796964-[5-(3-Chloro-phenylamino)-[1,3,4]oxadiazol-2-yl]-phenol

Product 1

HCID 115378895-[4-(Pyrimidin-5-yloxy)phenyl]-N-[3-chloro-phenyl]-1,3,4-oxadiazol-2-amineYield 40.8%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

4-{5-[(3-chlorophenyl)amino]-1,3,4-oxadiazol-2-yl}phenol (143.8 mg, 0.5 mmol) was dissolved in 3 mL of anhydrous DMF in a 2-5 mL microwave vial (Personal Chemistry). Solid potassium bis(trimethylsilyl)amide (200.0 mg, 1.0 mmol) was added and the reaction mixture was stirred with heating at 80° C. for 10 min, then 5-bromopyrimidine (95.4 mg, 0.6 mmol) was added, followed by anhydrous K2CO3 (69.1 mg, 0.5 mmol). Then the vial was capped and microwaved at 180° C. for 30 min. Then the reaction mixture was diluted with ca. 1 mL of MeOH, filtered through 0.22 um syringe filter and purified by reverse-phase preparative HPLC in acetonitrile/water system with 0.01% TFA. Fractions, containing the product, were partitioned between ca. 50 mL of EtOAc and ca. 50 mL of saturated aqueous NaHCO3. EtOAc layer was washed with brine, dried over anhydrous Na2SO4 and filtered. Solvent was removed in vacuo to give the title product as a light-yellow solid (74.7 mg). Yield 40.8%.

Workup

  1. customThen the vial was capped
  2. custommicrowaved at 180° C. for 30 min
  3. filtrationfiltered through 0.22 um syringe
  4. filtrationfilter
  5. custompurified by reverse-phase preparative HPLC in acetonitrile/water system with 0.01% TFA
  6. additionFractions, containing the product
  7. customwere partitioned between ca. 50 mL of EtOAc and ca. 50 mL of saturated aqueous NaHCO3
  8. washEtOAc layer was washed with brine
  9. dry with materialdried over anhydrous Na2SO4
  10. filtrationfiltered
  11. customSolvent was removed in vacuo

Sources & evidence

ORD record
ord-2635727d21754459ba16ac987109e0e4
Source dataset
uspto-grants-2011_12
Patent number
US08084618B2

Reaction notes

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