Triethylamine → 3-(8-(Benzyloxymethyl)-1,4-dioxaspiro[4.5]decan-8-yl)-1-(4-methoxyphenyl)-5-(p-tolyl)-1H-pyrazole

HRID 1802533Notes

Reaction equation

HRID 1802533 reaction equation
Cl.[CH3:2][O:3][C:4]1[CH:9]=[CH:8][C:7]([NH:10][NH2:11])=[CH:6][CH:5]=1.C(N(CC)CC)C.[CH2:19]([O:26][CH2:27][C:28]1([C:38]#[C:39][C:40]([C:42]2[CH:47]=[CH:46][C:45]([CH3:48])=[CH:44][CH:43]=2)=O)[CH2:37][CH2:36][C:31]2([O:35][CH2:34][CH2:33][O:32]2)[CH2:30][CH2:29]1)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>C(O)C>[CH2:19]([O:26][CH2:27][C:28]1([C:38]2[CH:39]=[C:40]([C:42]3[CH:43]=[CH:44][C:45]([CH3:48])=[CH:46][CH:47]=3)[N:10]([C:7]3[CH:8]=[CH:9][C:4]([O:3][CH3:2])=[CH:5][CH:6]=3)[N:11]=2)[CH2:29][CH2:30][C:31]2([O:32][CH2:33][CH2:34][O:35]2)[CH2:36][CH2:37]1)[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 27239044-Methoxyphenylhydrazine hydrochlorideHCID 583994693-(8-(Benzyloxymethyl)-1,4-dioxaspiro[4.5]decan-8-yl)-1-(p-tolyl)propyn-1-one

Product 1

HCID 672963233-(8-(Benzyloxymethyl)-1,4-dioxaspiro[4.5]decan-8-yl)-1-(4-methoxyphenyl)-5-(p-tolyl)-1H-pyrazoleYield 65.6%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

To a solution of 4-methoxyphenylhydrazine hydrochloride (280 mg, 1.60 mmol) in ethanol (2.7 mL), triethylamine (0.447 mL, 3.20 mmol) was added dropwise, and the obtained solution was stirred at room temperature for 30 minutes. To the reaction solution, a solution of 3-(8-(benzyloxymethyl)-1,4-dioxaspiro[4.5]decan-8-yl)-1-(p-tolyl)propyn-1-one (Reference Example 89) (540 mg, 1.33 mmol) in ethanol (2.7 mL) was added dropwise, and the obtained solution was stirred at room temperature for 14 hours. Thereafter, the reaction solution was concentrated under reduced pressure. Water was added to the residue and the resultant was extracted with ethyl acetate. The organic layer was washed with 1 M hydrochloric acid, distilled water and brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, n-hexane/ethyl acetate) to obtain the captioned compound (458 mg, 0.872 mmol, 65%) as a white amorphous product.

Workup

  1. stirringthe obtained solution was stirred at room temperature for 14 hours
  2. concentrationThereafter, the reaction solution was concentrated under reduced pressure
  3. additionWater was added to the residue
  4. extractionthe resultant was extracted with ethyl acetate
  5. washThe organic layer was washed with 1 M hydrochloric acid
  6. distillationdistilled water and brine
  7. dry with materialdried over anhydrous magnesium sulfate
  8. concentrationconcentrated under reduced pressure
  9. customThe residue was purified by flash chromatography (silica gel, n-hexane/ethyl acetate)

Sources & evidence

ORD record
ord-d7ce8da235d04886953080584efa0cc4
Source dataset
uspto-grants-2013_01
Patent number
US08349874B2

Reaction notes

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