Isoamyl Alcohol → HCID 70625226, compound

HRID 65991Notes

Reaction equation

HRID 65991 reaction equation
[Na].[CH3:2][CH:3]([CH3:7])[CH2:4][CH2:5][OH:6].Cl[C:9]1[C:10]2[C:11](=[N:21][N:22]([CH3:24])[CH:23]=2)[N:12]=[C:13]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH:14]=1.[C:25]([OH:32])(=[O:31])/[CH:26]=[CH:27]\[C:28]([OH:30])=[O:29]>CCOCC.O>[C:25]([OH:32])(=[O:31])/[CH:26]=[CH:27]\[C:28]([OH:30])=[O:29].[CH3:24][N:22]1[CH:23]=[C:10]2[C:11]([N:12]=[C:13]([C:15]3[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=3)[CH:14]=[C:9]2[O:6][CH2:5][CH2:4][CH:3]([CH3:7])[CH3:2])=[N:21]1

Participants

7

Reactant 4

HCID 31260Isoamyl AlcoholHCID 444266Maleic AcidHCID 5360545SodiumHCID 22756855HCID 22756855, compound

Product 1

HCID 70625226HCID 70625226, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 3283Diethyl EtherSolvent2×

Procedure

To a solution of 1.61 g. of sodium (0.07 mol.) in 200 ml. of 3-methyl butanol, 17.1 g. of 4-chloro-2-methyl-6-phenyl-2H-pyrazolo[3,4-b]pyridine (0.07 mol.) are added and the mixture is refluxed for six hours while stirring. The cooled solution is agitated with water, the organic layer dried and then evaporated in vacuo to give 20 g. (97%) of oil. To 18.5 g. of the oil (0.063 mol.), dissolved in 50 ml. of ether, a solution of 14.6 g. of maleic acid (0.126 mol.) in 500 ml. of ether is added. The precipitated maleate of 2-methyl-4-(3-methylbutoxy)-6-phenyl-2H-pyrazolo [3,4-b]pyridine, at first oily, crystallizes on standing overnight, yield: 24.6 g. (83%); m.p. 114°-116°. Recrystallization from ethyl acetate gives a product which melts at 119°-120°.

Workup

  1. temperaturethe mixture is refluxed for six hours
  2. customthe organic layer dried
  3. customevaporated in vacuo
  4. customto give 20 g
  5. dissolutionof the oil (0.063 mol.), dissolved in 50 ml
  6. customThe precipitated maleate of 2-methyl-4-(3-methylbutoxy)-6-phenyl-2H-pyrazolo [3,4-b]pyridine, at first oily, crystallizes
  7. customRecrystallization from ethyl acetate
  8. customgives a product which melts at 119°-120°

Sources & evidence

ORD record
ord-69b56ea87f7d4a50a49798b3cbfd0d3d
Source dataset
uspto-grants-1978_12
Patent number
US04129738

Reaction notes

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