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

HRID 1098052Notes

Reaction equation

HRID 1098052 reaction equation
[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[Si]([O:26][CH:27]1[CH2:30][N:29]([CH2:31][C@H:32]([O:43][C:44]2[N:49]=[CH:48][N:47]=[C:46]3[N:50]([C:53]4[CH:58]=[CH:57][CH:56]=[CH:55][C:54]=4[Cl:59])[N:51]=[CH:52][C:45]=23)[C:33]([NH:35][C:36]2[CH:41]=[CH:40][C:39]([CH3:42])=[CH:38][N:37]=2)=[O:34])[CH2:28]1)(C(C)(C)C)(C)C>C1COCC1>[Cl:59][C:54]1[CH:55]=[CH:56][CH:57]=[CH:58][C:53]=1[N:50]1[C:46]2=[N:47][CH:48]=[N:49][C:44]([O:43][C@@H:32]([CH2:31][N:29]3[CH2:28][CH:27]([OH:26])[CH2:30]3)[C:33]([NH:35][C:36]3[CH:41]=[CH:40][C:39]([CH3:42])=[CH:38][N:37]=3)=[O:34])=[C:45]2[CH:52]=[N:51]1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 57504553(2S)-3-(3-(tert-butyldimethylsilyloxy)azetidin-1-yl)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide

Product 1

HCID 57504433(2S)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-3-(3-hydroxyazetidin-1-yl)-N-(5-methylpyridin-2-yl)propanamide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Tetrabutylammonium fluoride (1M in THF) (1.515 mL, 1.51 mmol) was added to (2S)-3-(3-(tert-butyldimethylsilyloxy)azetidin-1-yl)-2-(1-(2-chlorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide (Intermediate AD7) (0.9 g, 1.51 mmol) in THF (10 mL) under nitrogen. The resulting mixture was stirred at ambient temperature for 2.5 hours. The reaction mixture was quenched with saturated NH4Cl, diluted with DCM and poured onto a phase separator. The organic layer was evaporated to a gum. The crude product was purified by flash silica chromatography, elution gradient 0 to 10% MeOH in EtOAc to afford the product (0.313 g, 43.1%, 98% ee). 1H NMR (400 MHz, CDCl3) δ 2.29 (3H, s), 2.50-2.78 (1H, m), 3.15-3.31 (4H, m), 3.79-3.89 (2H, m), 4.47-4.55 (1H, m), 5.91 (1H, t), 7.42-7.56 (4H, m), 7.59-7.65 (1H, m), 8.08-8.14 (2H, m), 8.37 (1H, s), 8.59 (1H, s), 9.53 (1H, s); m/z (ES+) (M+H)+=480.41; HPLC tR=1.19 min.

Workup

  1. customThe reaction mixture was quenched with saturated NH4Cl
  2. additiondiluted with DCM
  3. additionpoured onto a phase separator
  4. customThe organic layer was evaporated to a gum
  5. customThe crude product was purified by flash silica chromatography, elution gradient 0 to 10% MeOH in EtOAc
  6. customto afford the product (0.313 g, 43.1%, 98% ee)

Sources & evidence

ORD record
ord-dad5cba79a9f4148976f307145a7eee7
Source dataset
uspto-grants-2012_03
Patent number
US08143263B2

Reaction notes

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