Formaldehyde → 3-iodo-1-(1-methyl-4-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

HRID 2056135Notes

Reaction equation

HRID 2056135 reaction equation
[I:1][C:2]1[C:10]2[C:5](=[N:6][CH:7]=[N:8][C:9]=2[NH2:11])[N:4]([CH:12]2[CH2:17][CH2:16][NH:15][CH2:14][CH2:13]2)[N:3]=1.C=O.[C:20](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)(O)[O-].[Na+]>ClCCCl>[I:1][C:2]1[C:10]2[C:5](=[N:6][CH:7]=[N:8][C:9]=2[NH2:11])[N:4]([CH:12]2[CH2:17][CH2:16][N:15]([CH3:20])[CH2:14][CH2:13]2)[N:3]=1

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 223466933-Iodo-1-(piperidin-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Product 1

HCID 223471833-iodo-1-(1-methyl-4-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amineYield 53%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

3-Iodo-1-(4-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (500 mg, 1.45 mmol), formaldehyde (30% solution in water, 0.16 mL, 1.60 mmol) and sodium triacetoxyborohydride (430 mg, 2.03 mmol) were mixed in 1,2-dichloroethane (5 mL). The reaction mixture was stirred at room temperature for 4 hours. Saturated sodium bicarbonate solution was added to adjust the pH to about 8. The layers were separated and the aqueous layer was extracted with dichloromethane. The combined organic layer was washed with brine, dried over MgSO4, filtered and evaporated to give 3-iodo-1-(1-methyl-4-piperidyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (275 mg, 53%). 1H NMR (DMSO-d6) δ 1.85 (m, 2H), 2.09 (m, 4H), 2.22 (s, 3H), 2.88 (m, 2H), 4.75 (m, 1H), 8.19 (s, 1H), 8.32 (s, 1H). LCMS (Thermoquest AQA single Quad MS, Finnigan HPLC-Column: Genesis, C18, 3 um, 33×4.6 mm. Eluents: 30% B/A to 95% B/A in 4.5 min. (B: acetonitrile, A: 50 mM ammonia acetate buffer, pH 4.5), 0.8 mL/min.): MH+ 359.0, Rt 0.46 min.

Workup

  1. customThe layers were separated
  2. extractionthe aqueous layer was extracted with dichloromethane
  3. washThe combined organic layer was washed with brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. customevaporated

Sources & evidence

ORD record
ord-9e340d0c7ef9431ebe1047237e369e76
Source dataset
uspto-grants-2008_02
Patent number
US07332497B2

Reaction notes

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