Dichloromethane → Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate

HRID 2368978Notes

Reaction equation

HRID 2368978 reaction equation
[CH3:1][Si:2]([CH3:40])([CH3:39])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:31][O:32][CH2:33][CH2:34][Si:35]([CH3:38])([CH3:37])[CH3:36])[C:8]1[N:13]2[N:14]=[CH:15][C:16](I)=[C:12]2[N:11]=[C:10]([CH:18]2[CH2:23][CH2:22][N:21]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:20][CH2:19]2)[CH:9]=1.[C:41]1([C:47]2[CH:52]=[CH:51][C:50](B3OC(C)(C)C(C)(C)O3)=[CH:49][N:48]=2)[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1.C(Cl)Cl.C([O-])([O-])=O.[Na+].[Na+]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].COCCOC>[CH3:1][Si:2]([CH3:40])([CH3:39])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:31][O:32][CH2:33][CH2:34][Si:35]([CH3:38])([CH3:37])[CH3:36])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:50]3[CH:49]=[N:48][C:47]([C:41]4[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=4)=[CH:52][CH:51]=3)=[C:12]2[N:11]=[C:10]([CH:18]2[CH2:23][CH2:22][N:21]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:20][CH2:19]2)[CH:9]=1

Participants

7

Reactant 4

HCID 6344DichloromethaneHCID 10340Sodium CarbonateHCID 457865262-Phenyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridineHCID 66584511Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-iodopyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate

Product 1

HCID 66584899Tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylateYield 74.2%

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

To a pressure tube were charged tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-iodopyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate (4.2 g, 5.97 mmol), 2-phenyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (2 g, 7.1 mmol), PdCl2(dppf).CH2Cl2 (240 mg, 0.33 mmol), DME (16 mL) and 2M Na2CO3 (8 mL). The mixture was briefly degassed with Argon and the tube was capped and heated at 100° C. for 15 hours. On cooling, H2O (20 mL) and EtOAc (40 mL) and aqueous layer was extracted with EtOAc (3×) and combined organic layers were washed with brine once and dried (MgSO4). After concentration in vacuo the residue was purified on silica gel. Elution with EtOAc/Hexanes (0-40%) gave tert-butyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)piperidine-1-carboxylate (3.24 g, 74%).

Workup

  1. customThe mixture was briefly degassed with Argon
  2. customthe tube was capped
  3. temperatureOn cooling
  4. extractionH2O (20 mL) and EtOAc (40 mL) and aqueous layer was extracted with EtOAc (3×)
  5. washwere washed with brine once
  6. dry with materialdried (MgSO4)
  7. concentrationAfter concentration in vacuo the residue
  8. customwas purified on silica gel
  9. washElution with EtOAc/Hexanes (0-40%)

Sources & evidence

ORD record
ord-bbfcfb1de61c4a0588090cad13ca0e51
Source dataset
uspto-grants-2014_04
Patent number
US08703784B2

Reaction notes

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