Potassium Phosphate, Tribasic → 5-(3-(4-cyclopropylpyrimidin-2-yl)-6-fluoro-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine

HRID 634303Notes

Reaction equation

HRID 634303 reaction equation
[F:1][C:2]1[CH:10]=[C:9]2[C:5]([C:6](B3OC(C)(C)C(C)(C)O3)=[CH:7][N:8]2[S:11]([C:14]2[CH:20]=[CH:19][C:17]([CH3:18])=[CH:16][CH:15]=2)(=[O:13])=[O:12])=[CH:4][C:3]=1[C:30]1[O:34][C:33]([NH:35][CH:36]([CH3:38])[CH3:37])=[N:32][N:31]=1.Br[C:40]1[N:45]=[C:44]([CH:46]2[CH2:48][CH2:47]2)[CH:43]=[CH:42][N:41]=1.P([O-])([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.[Pd].[Pd].CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C>[CH:46]1([C:44]2[CH:43]=[CH:42][N:41]=[C:40]([C:6]3[C:5]4[C:9](=[CH:10][C:2]([F:1])=[C:3]([C:30]5[O:34][C:33]([NH:35][CH:36]([CH3:37])[CH3:38])=[N:32][N:31]=5)[CH:4]=4)[N:8]([S:11]([C:14]4[CH:15]=[CH:16][C:17]([CH3:18])=[CH:19][CH:20]=4)(=[O:12])=[O:13])[CH:7]=3)[N:45]=2)[CH2:48][CH2:47]1

Participants

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 49758247HCID 49758247, compoundHCID 683280445-(6-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine

Product 1

HCID 683288885-(3-(4-cyclopropylpyrimidin-2-yl)-6-fluoro-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amineYield 102.6%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylCatalyst

Conditions

Temperature
130 °C

Procedure

A 20 mL microwave vial was charged with 5-(6-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine (185 mg, 0.342 mmol), Xphos (Strem Chemicals, Newburyport, Mass., 9.8 mg, 0.021 mmol), Pd2(dba)3 (Strem Chemicals, Newburyport, Mass., 9.4 mg, 10.27 μmol), 2-bromo-4-cyclopropylpyrimidine (CombiPhos Catalysts Inc., Princeton, N.J., 82 mg, 0.411 mmol) and potassium phosphate (218 mg, 1.03 mmol) followed by purging with argon. The solids were treated with dioxane (4.0 mL) and water (1.0 mL) and heated in the microwave at 130° C. for 20 min. The reaction mixture was treated with water and extracted with EtOAc, dried over MgSO4, filtered and concentrated. Purification of the crude residue on the ISCO Combiflash Rf (12 g Redisep column, using a gradient of 0-100% EtOAc in hexanes) afforded 5-(3-(4-cyclopropylpyrimidin-2-yl)-6-fluoro-1-tosyl-1H-indol-5-yl)-N-isopropyl-1,3,4-oxadiazol-2-amine (186.7 mg, 0.351 mmol, 102% yield) as a viscous yellow oil in ca. 90% purity. MS (ESI, pos. ion) m/z: 533.0 (M+H)+. The material was used in the subsequent step without further purification.

Workup

  1. customby purging with argon
  2. additionThe solids were treated with dioxane (4.0 mL) and water (1.0 mL)
  3. additionThe reaction mixture was treated with water
  4. extractionextracted with EtOAc
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customPurification of the crude residue on the ISCO Combiflash Rf (12 g Redisep column

Sources & evidence

ORD record
ord-2dd85c3f98714f4eb1823713105e1502
Source dataset
uspto-grants-2016_04
Patent number
US09321756B2

Reaction notes

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