Sodium Acetate → 2-[3,5-Dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylsulfanyl)-phenyl]-3,5-dioxo-2,3,4,5-tetrahydro-[1,2,4]triazine-6-carbonitrile

HRID 271215Notes

Reaction equation

HRID 271215 reaction equation
C([O:3][C:4](=O)[NH:5][C:6](=[O:31])[C:7]([C:29]#[N:30])=[N:8][NH:9][C:10]1[CH:15]=[C:14]([Cl:16])[C:13]([S:17][C:18]2[CH:23]=[C:22]([CH:24]([CH3:26])[CH3:25])[C:21](=[O:27])[NH:20][N:19]=2)=[C:12]([Cl:28])[CH:11]=1)C.C([O-])(=O)C.[Na+]>C(O)(=O)C.C(Cl)Cl>[Cl:28][C:12]1[CH:11]=[C:10]([N:9]2[C:4](=[O:3])[NH:5][C:6](=[O:31])[C:7]([C:29]#[N:30])=[N:8]2)[CH:15]=[C:14]([Cl:16])[C:13]=1[S:17][C:18]1[CH:23]=[C:22]([CH:24]([CH3:26])[CH3:25])[C:21](=[O:27])[NH:20][N:19]=1

Participants

5

Reactant 2

HCID 517045Sodium AcetateHCID 86610368(2-Cyano-2-{[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylsulfanyl)-phenyl]-hydrazono}-acetyl)-carbamic acid ethyl ester

Product 1

HCID 598344382-[3,5-Dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylsulfanyl)-phenyl]-3,5-dioxo-2,3,4,5-tetrahydro-[1,2,4]triazine-6-carbonitrileYield 103.2%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
120 °C

Procedure

A solution of (2-cyano-2-{[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylsulfanyl)-phenyl]-hydrazono}-acetyl)-carbamic acid ethyl ester (86) (2.98 g, 5.99 mmol) in glacial acetic acid (60 mL) was treated with sodium acetate (2.46 g, 29.95 mmol). The resulting mixture was heated to 120° C. for 3 h. At this time, LCMS indicated complete consumption of the starting material and conversion to product. The reaction was cooled to 25° C., poured onto water (200 mL) and was extracted with ethyl acetate (2×150 mL). The organics were washed with a saturated aqueous sodium chloride solution (1×150 mL), dried with magnesium sulfate, filtered and concentrated under vacuum to give an orange solid. This solid was dissolved in a 1:1 methylene chloride:hexanes mixture and concentrated in vacuo three times. It was then dissolved in a 1:1 methylene chloride:methanol mixture and concentrated under vacuum to afford 2-[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylsulfanyl)-phenyl]-3,5-dioxo-2,3,4,5-tetrahydro-[1,2,4]triazine-6-carbonitrile (87) (2.79 g) as an orange solid. The material was used without further purification; ES(+)-HRMS m/e calcd for C17H12Cl2N6O3S (M+H)+ 451.0142, found 451.0143. Exact Mass=450.0069; Molecular weight=451.29

Workup

  1. customconsumption of the starting material and conversion to product
  2. temperatureThe reaction was cooled to 25° C.
  3. additionpoured onto water (200 mL)
  4. extractionwas extracted with ethyl acetate (2×150 mL)
  5. washThe organics were washed with a saturated aqueous sodium chloride solution (1×150 mL)
  6. dry with materialdried with magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated under vacuum
  9. customto give an orange solid
  10. concentrationhexanes mixture and concentrated in vacuo three times
  11. dissolutionIt was then dissolved in a 1:1 methylene chloride
  12. concentrationmethanol mixture and concentrated under vacuum

Sources & evidence

ORD record
ord-33893790700b43278c7f7705efe41036
Source dataset
uspto-grants-2008_11
Patent number
US07452882B2

Reaction notes

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