4-Heptanone → [7-(2-chloro-4,6-dimethylphenyl)-2-methyl-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridin-3-yl](1-propylbutyl)amine

HRID 1826960Notes

Reaction equation

HRID 1826960 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[C:4]([CH3:9])[C:3]=1[N:10]1[CH2:15][CH2:14][CH2:13][C:12]2=[C:16]([NH2:20])[N:17]([CH3:19])[N:18]=[C:11]12.[CH3:21][CH2:22][CH2:23][C:24](=O)[CH2:25][CH2:26][CH3:27].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClC(Cl)C>[Cl:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[C:4]([CH3:9])[C:3]=1[N:10]1[CH2:15][CH2:14][CH2:13][C:12]2=[C:16]([NH:20][CH:24]([CH2:25][CH2:26][CH3:27])[CH2:23][CH2:22][CH3:21])[N:17]([CH3:19])[N:18]=[C:11]12

Participants

5

Reactant 3

HCID 312464-Heptanone2×HCID 5049666Sodium triacetoxyborohydride2×HCID 221362787-(2-chloro-4,6-dimethylphenyl)-2-methyl-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridin-3-ylamine

Product 1

HCID 22136272[7-(2-chloro-4,6-dimethylphenyl)-2-methyl-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridin-3-yl](1-propylbutyl)amine

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Conditions

Temperature
60 °C

Procedure

7-(2-Chloro-4,6-dimethylphenyl)-2-methyl-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridin-3-ylamine (45.7 mg) and 4-heptanone (24 μL) were dissolved and stirred in 3 mL of dichloroethane. After 15 min, 44.5 mg of sodium triacetoxyborohydride was added. The reaction mixture was stirred at 60° C. during the day and at room temperature over night during 3 d. During this period, an additional 109 μL of 4-heptanone and an additional 104 mg of sodium triacetoxyborohydride were added to drive the reaction to completion. The reaction mixture was then partitioned between ethyl acetate and water. The ethyl acetate was dried with magnesium sulfate and concentrated. The crude product was chromatographed on silica gel eluting with an acetone/hexane gradient to provide 11 mg of [7-(2-chloro-4,6-dimethylphenyl)-2-methyl-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridin-3-yl](1-propylbutyl)amine as a crystalline film, ms m/z 389 (MH+).

Workup

  1. waitDuring this period
  2. customthe reaction to completion
  3. customThe reaction mixture was then partitioned between ethyl acetate and water
  4. dry with materialThe ethyl acetate was dried with magnesium sulfate
  5. concentrationconcentrated
  6. customThe crude product was chromatographed on silica gel eluting with an acetone/hexane gradient

Sources & evidence

ORD record
ord-82232a42ff9f47e3aabb91d0f9ba3932
Source dataset
uspto-grants-2006_05
Patent number
US07053103B2

Reaction notes

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