Potassium Phosphate, Tribasic → 1-[(2-Tert-butyl-6-cyclopropylpyrazolo[1,5-a]pyrimidin-3-yl)methyl]-4-propylpyrrolidin-2-one

HRID 2043648Notes

Reaction equation

HRID 2043648 reaction equation
Br[C:2]1[CH:3]=[N:4][C:5]2[N:6]([N:8]=[C:9]([C:21]([CH3:24])([CH3:23])[CH3:22])[C:10]=2[CH2:11][N:12]2[CH2:16][CH:15]([CH2:17][CH2:18][CH3:19])[CH2:14][C:13]2=[O:20])[CH:7]=1.[CH:25]1(B(O)O)[CH2:27][CH2:26]1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>COCCOC.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.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[C:21]([C:9]1[C:10]([CH2:11][N:12]2[CH2:16][CH:15]([CH2:17][CH2:18][CH3:19])[CH2:14][C:13]2=[O:20])=[C:5]2[N:4]=[CH:3][C:2]([CH:25]3[CH2:27][CH2:26]3)=[CH:7][N:6]2[N:8]=1)([CH3:24])([CH3:23])[CH3:22]

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 2760897Cyclopropylboronic acidHCID 577430771-[(6-Bromo-2-tertbutylpyrazolo(1,5-a)pyrimidin-3-yl)methyl]-4-propylpyrrolidin-2-one

Product 1

HCID 536291231-[(2-Tert-butyl-6-cyclopropylpyrazolo[1,5-a]pyrimidin-3-yl)methyl]-4-propylpyrrolidin-2-oneYield 29.2%

Reagents, catalysts & solvents 3

HCID 178420534HCID 178420534, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
90 °C

Procedure

To a solution of 1-[(6-bromo-2-tertbutylpyrazolo(1,5-a)pyrimidin-3-yl)methyl]-4-propylpyrrolidin-2-one 190 (0.56 mmol, 1 eq, 0.2 g) in 5 ml of DME is added successively palladium-tetrakis-triphenylphosphine (0.019 mmol, 0.03 eq, 22 mg), cyclopropyl-boronic acid (0.727 mmol, 1.1 eq, 62 mg), and K3PO4 (1.98 mmol, 3 eq, 0.42 g) dissolved in 4 ml of water. The mixture is degassed and stirred vigorously at 90° C. for 4 hours. The solvent is removed under reduce pressure, water is added and the resulting mixture is extracted with dichloromethane. The organic phases are combined, washed with brine and dried over MgSO4. Volatiles are removed under reduce pressure. The crude product is purified by chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 99/1/0.1) to afford 58 mg of pure 1-[(2-tert-butyl-6-cyclopropylpyrazolo[1,5-a]pyrimidin-3-yl)methyl]-4-propylpyrrolidin-2-one 192 the compound in pure form.

Workup

  1. customThe mixture is degassed
  2. customThe solvent is removed
  3. additionis added
  4. extractionthe resulting mixture is extracted with dichloromethane
  5. washwashed with brine
  6. dry with materialdried over MgSO4
  7. customVolatiles are removed
  8. customThe crude product is purified by chromatography on silicagel (CH2Cl2/MeOH/NH4OH: 99/1/0.1)

Sources & evidence

ORD record
ord-cf39a3a49202457fbba9ebb4b4472930
Source dataset
uspto-grants-2013_11
Patent number
US08586623B2

Reaction notes

Loading…