Potassium Carbonate → HCID 14989340, compound

HRID 981655Notes

Reaction equation

HRID 981655 reaction equation
[Cl:1][C:2]1[N:3]=[N:4][C:5]([N:8]2[CH2:13][CH2:12][CH:11]([CH2:14][CH2:15]Cl)[CH2:10][CH2:9]2)=[CH:6][CH:7]=1.[OH:17][C:18]1[CH:29]=[CH:28][C:21]([C:22]([O:24][CH2:25][C:26]#[CH:27])=[O:23])=[CH:20][CH:19]=1.C(=O)([O-])[O-].[K+].[K+].CN(C)C(=O)C>O>[Cl:1][C:2]1[N:3]=[N:4][C:5]([N:8]2[CH2:13][CH2:12][CH:11]([CH2:14][CH2:15][O:17][C:18]3[CH:19]=[CH:20][C:21]([C:22]([O:24][CH2:25][C:26]#[CH:27])=[O:23])=[CH:28][CH:29]=3)[CH2:10][CH2:9]2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 11430Potassium CarbonateHCID 31374DimethylacetamideHCID 14989386HCID 14989386, compoundHCID 14989397HCID 14989397, compound

Product 1

HCID 14989340HCID 14989340, compoundYield 86.7%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
110 °C

Procedure

A mixture of 3.9 parts of 3-chloro-6-[4-(2-chloroethyl)-1-piperidinyl]pyridazine, 2.64 parts of (2-propynyl) 4-hydroxybenzoate, 2.76 parts of potassium carbonate and 75 parts of N,N-dimethylacetamide was stirred overnight at 110° C. After cooling, the reaction mixture was poured into 100 parts of water and the product was extracted with methylbenzene. The extract was dried, filtered and evaporated. The residue was purified by column chromatography over silica gel using a mixture of trichloromethane and methanol (98:2 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from 2-propanol. The product was filtered off and dried, yielding 5.2 parts (86.7%) of (2-propynyl) 4-[2-[1-(6-chloro-3-pyridazinyl)-4-piperidinyl]ethoxy]benzoate; mp. 122.0° C. (comp. 120).

Workup

  1. temperatureAfter cooling
  2. extractionthe product was extracted with methylbenzene
  3. customThe extract was dried
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by column chromatography over silica gel using
  7. additiona mixture of trichloromethane and methanol (98:2 by volume) as eluent
  8. customThe pure fractions were collected
  9. customthe eluent was evaporated
  10. customThe residue was crystallized from 2-propanol
  11. filtrationThe product was filtered off
  12. customdried

Sources & evidence

ORD record
ord-75910b182c9046daa26fc8bc29456c7f
Source dataset
uspto-grants-1991_02
Patent number
US04992433

Reaction notes

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