Dichloromethane → tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 1913247Notes

Reaction equation

HRID 1913247 reaction equation
Cl[C:2]1[CH:7]=[C:6]([N:8]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:24])([CH3:23])[CH3:22])[CH2:9][O:10][CH2:11][CH2:12][Si:13]([CH3:16])([CH3:15])[CH3:14])[N:5]2[N:25]=[CH:26][CH:27]=[C:4]2[N:3]=1.CC1(C)C(C)(C)OB([C:36]2[CH2:41][CH2:40][N:39]([C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[CH2:38][CH:37]=2)O1.ClCCl.C([O-])([O-])=O.[Na+].[Na+]>COCCOC>[CH3:14][Si:13]([CH3:16])([CH3:15])[CH2:12][CH2:11][O:10][CH2:9][N:8]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:24])([CH3:23])[CH3:22])[C:6]1[N:5]2[N:25]=[CH:26][CH:27]=[C:4]2[N:3]=[C:2]([C:36]2[CH2:41][CH2:40][N:39]([C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[CH2:38][CH:37]=2)[CH:7]=1

Participants

6

Reactant 4

HCID 6344DichloromethaneHCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 772312195-chloro-N,N-bis((2-(trimethylsilyl)ethoxy)methyl)pyrazolo[1,5-a]pyrimidin-7-amine

Product 1

HCID 66584699tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)-5,6-dihydropyridine-1(2H)-carboxylateYield 80%

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

To a pressure tube was charged 5-chloro-N,N-bis((2-(trimethylsilyl)ethoxy)methyl)pyrazolo[1,5-a]pyrimidin-7-amine (Int-9d, 5.36 g, 12.5 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (4.26 g, 13.8 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (1:1) (510 mg, 0.62 mmol), 2M Na2CO3 (30 ml) and DME (60 ml). The tube was degassed with Ar briefly, capped and heated at 100° C. with stirring overnight. After cooling, the reaction mixture was diluted with EtOAc and water, the organic layer was isolated, washed with brine and dried (MgSO4). After the solvent was removed under reduced pressure, the residue was purified on silica. Elution with EtOAc in hexanes (0-25%) gave tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)-5,6-dihydropyridine-1(2H)-carboxylate (Int-9e) (5.76 g, 80%).

Workup

  1. customThe tube was degassed with Ar briefly
  2. customcapped
  3. temperatureAfter cooling
  4. additionthe reaction mixture was diluted with EtOAc and water
  5. customthe organic layer was isolated
  6. washwashed with brine
  7. dry with materialdried (MgSO4)
  8. customAfter the solvent was removed under reduced pressure
  9. customthe residue was purified on silica
  10. washElution with EtOAc in hexanes (0-25%)

Sources & evidence

ORD record
ord-9ceb7474b17f4a4bad9c156b4afef745
Source dataset
uspto-grants-2013_12
Patent number
US08609675B2

Reaction notes

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