Hydrochloric Acid → HCID 178438588, compound

HRID 1412362Notes

Reaction equation

HRID 1412362 reaction equation
O1[C:5]2([CH2:10][CH2:9][CH:8]([N:11]3[C:16](=[O:17])[C:15]([CH2:18][C:19]4[CH:24]=[CH:23][C:22]([C:25]5[C:26]([C:31]#[N:32])=[CH:27][CH:28]=[CH:29][CH:30]=5)=[CH:21][CH:20]=4)=[C:14]([CH2:33][CH2:34][CH3:35])[N:13]4[N:36]=[CH:37][CH:38]=[C:12]34)[CH2:7][CH2:6]2)[O:4]CC1.Cl.[OH-].[Na+]>O1CCCC1.C(OCC)(=O)C>[OH:4][C@H:5]1[CH2:6][CH2:7][C@H:8]([N:11]2[C:16](=[O:17])[C:15]([CH2:18][C:19]3[CH:24]=[CH:23][C:22]([C:25]4[C:26]([C:31]#[N:32])=[CH:27][CH:28]=[CH:29][CH:30]=4)=[CH:21][CH:20]=3)=[C:14]([CH2:33][CH2:34][CH3:35])[N:13]3[N:36]=[CH:37][CH:38]=[C:12]23)[CH2:9][CH2:10]1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 670085494'-{(4-(1,4-Dioxaspiro[4.5]dec-8-yl)-5-oxo-7-propyl-4,5-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile

Product 1

HCID 178438588HCID 178438588, compoundYield 83%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of 4′-{[4-(1,4-dioxaspiro[4.5]dec-8-yl)-5-oxo-7-propyl-4,5-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile (27.7 g) in tetrahydrofuran (200 mL) was added 3M hydrochloric acid (200 mL), and the mixture was stirred at 60° C. for 15 hr. The mixture was allowed to cool to room temperature, diluted with ethyl acetate, and neutralized with 8M aqueous sodium hydroxide solution. The mixture was extracted with ethyl acetate, and the organic layer was successively washed with water and brine, dried over anhydrous magnesium sulfate, and concentrated. The residue was crystallized using ethyl acetate, and the resulting solid was collected by filtration, and dissolved in tetrahydrofuran (100 mL). This solution was added dropwise to a solution of lithium borohydride (2M tetrahydrofuran solution, 37 mL) in tetrahydrofuran (150 mL) at −5° C. over 30 min. After stirring for 1.5 hr, ethyl acetate and saturated aqueous ammonium chloride solution were added. The mixture was extracted with ethyl acetate, and the organic layer was successively washed with water and brine, dried over anhydrous magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a pale-yellow amorphous solid (21.1 g, 83%).

Workup

  1. temperatureto cool to room temperature
  2. extractionThe mixture was extracted with ethyl acetate
  3. washthe organic layer was successively washed with water and brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated
  6. customThe residue was crystallized
  7. filtrationthe resulting solid was collected by filtration
  8. dissolutiondissolved in tetrahydrofuran (100 mL)
  9. additionThis solution was added dropwise to a solution of lithium borohydride (2M tetrahydrofuran solution, 37 mL) in tetrahydrofuran (150 mL) at −5° C. over 30 min
  10. stirringAfter stirring for 1.5 hr
  11. additionethyl acetate and saturated aqueous ammonium chloride solution were added
  12. extractionThe mixture was extracted with ethyl acetate
  13. washthe organic layer was successively washed with water and brine
  14. dry with materialdried over anhydrous magnesium sulfate
  15. concentrationconcentrated
  16. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-85482fcca66641239efc432808d8e825
Source dataset
uspto-grants-2014_12
Patent number
US08921379B2

Reaction notes

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