Tetrabutylammonium Fluoride → (2S)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-3-(2-hydroxyethoxy)-N-(5-methylpyridin-2-yl)propanamide

HRID 1098040Notes

Reaction equation

HRID 1098040 reaction equation
[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[Si]([O:36][CH2:37][CH2:38][O:39][CH2:40][C@H:41]([O:52][C:53]1[N:58]=[CH:57][N:56]=[C:55]2[N:59]([C:62]3[CH:67]=[CH:66][CH:65]=[CH:64][C:63]=3[Cl:68])[N:60]=[CH:61][C:54]=12)[C:42]([NH:44][C:45]1[CH:50]=[CH:49][C:48]([CH3:51])=[CH:47][N:46]=1)=[O:43])(C(C)(C)C)(C1C=CC=CC=1)C1C=CC=CC=1>C1COCC1>[Cl:68][C:63]1[CH:64]=[CH:65][CH:66]=[CH:67][C:62]=1[N:59]1[C:55]2=[N:56][CH:57]=[N:58][C:53]([O:52][C@@H:41]([CH2:40][O:39][CH2:38][CH2:37][OH:36])[C:42]([NH:44][C:45]3[CH:50]=[CH:49][C:48]([CH3:51])=[CH:47][N:46]=3)=[O:43])=[C:54]2[CH:61]=[N:60]1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 57504542(2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide

Product 1

HCID 57504422(2S)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-3-(2-hydroxyethoxy)-N-(5-methylpyridin-2-yl)propanamideYield 79%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Tetrabutylammonium fluoride (1M in THF) (0.271 mL, 0.27 mmol) was added to (2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide (Intermediate AG4) (96 mg, 0.14 mmol) in THF (5 mL) under nitrogen. The resulting mixture was stirred at room temperature for 1 hour. The reaction mixture was quenched with saturated NH4Cl (10 mL), extracted with Et2O (3×15 mL), the combined organic layers were back washed with water (10 mL), dried (MgSO4), and evaporated to afford crude product. The crude product was purified by flash silica chromatography, eluting with 0 to 10% MeOH in DCM to afford the product (50.0 mg, 79%). 1H NMR (400 MHz, CDCl3) δ2.28 (s, 3H), 3.32 (s, 1H), 3.70-3.81 (m, 4H), 4.13-4.26 (m, 2H), 6.08 (t, 1H), 7.43-7.55 (m, 4H), 7.59-7.63 (m, 1H), 8.05-8.10 (m, 2H), 8.44 (s, 1H), 8.59 (s, 1H), 9.11 (s, 1H); m/z (ESI+) (M+H)+=469.45; HPLC tR=1.86 min

Workup

  1. customThe reaction mixture was quenched with saturated NH4Cl (10 mL)
  2. extractionextracted with Et2O (3×15 mL)
  3. washthe combined organic layers were back washed with water (10 mL)
  4. dry with materialdried (MgSO4)
  5. customevaporated
  6. customto afford crude product
  7. customThe crude product was purified by flash silica chromatography
  8. washeluting with 0 to 10% MeOH in DCM

Sources & evidence

ORD record
ord-655b450e682c4ef0ab54eba92a3be288
Source dataset
uspto-grants-2012_03
Patent number
US08143263B2

Reaction notes

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