Tetrabutylammonium Fluoride → (2S)-2-(1-(2-chloro-6-cyanophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-3-(2-hydroxyethoxy)-N-(5-methylpyridin-2-yl)propanamide

HRID 1098030Notes

Reaction equation

HRID 1098030 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[C:67]([C:68]#[N:69])=[CH:66][CH:65]=[CH:64][C:63]=3[Cl:70])[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:70][C:63]1[CH:64]=[CH:65][CH:66]=[C:67]([C:68]#[N:69])[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 57504530(2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chloro-6-cyanophenyl)-1H-pyrazolo [3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide

Product 1

HCID 57504406(2S)-2-(1-(2-chloro-6-cyanophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-3-(2-hydroxyethoxy)-N-(5-methylpyridin-2-yl)propanamide

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Tetrabutylammonium fluoride (1M in THF) (0.203 mL, 0.20 mmol) was added to (2S)-3-(2-(tert-butyldiphenylsilyloxy)ethoxy)-2-(1-(2-chloro-6-cyanophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-yloxy)-N-(5-methylpyridin-2-yl)propanamide (Intermediate AH9) (149 mg, 0.20 mmol) in THF (5 mL) under nitrogen. The resulting mixture was stirred at ambient temperature for 1 hour. The reaction mixture was quenched with saturated NH4Cl (2 mL), diluted with DCM (25 mL) and poured onto a phase separator. The organic phase was reduced to give a gum. The crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 50 mm diameter, 150 mm length), using decreasingly polar mixtures of water (containing 0.1% formic acid) and MeCN as eluents to afford the product (45.0 mg, 44.8%, 58% ee). 1H NMR (400 MHz, CDCl3) d 2.23 (3H, s), 3.77-3.62 (4H, m), 4.20-4.04 (2H, m), 6.01 (1H, m), 7.51-7.46 (1H, m), 7.55 (1H, t), 7.72 (1H, dd), 7.84-7.76 (1H, m), 8.03 (2H, d), 8.46 (1H, d), 8.55 (1H, d), 9.19-8.96 (1H, m) OH not observed. m/z (ES+) (M+H)+=494; HPLC tR=1.82 min.

Workup

  1. customThe reaction mixture was quenched with saturated NH4Cl (2 mL)
  2. additiondiluted with DCM (25 mL)
  3. additionpoured onto a phase separator
  4. customto give a gum
  5. customThe crude product was purified by preparative HPLC (Waters XBridge Prep C18 OBD column, 5μ silica, 50 mm diameter, 150 mm length)
  6. customto afford the product (45.0 mg, 44.8%, 58% ee)

Sources & evidence

ORD record
ord-96fb109294c0450da142e9418417ddd2
Source dataset
uspto-grants-2012_03
Patent number
US08143263B2

Reaction notes

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