Reaction #2286345

ord-46ae54b923074bb29c4c1f0e42013a84

Reaction equation

CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C#N)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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
CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C#N)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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
CC(=O)O
acetic acid
→
CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C(=O)O)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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-carboxylic acid
Yield 83.0%
CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C(=O)O)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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-carboxylic acid
Yield 83.0%

Reactants

CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C#N)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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
CC(C)c1cc(Sc2c(Cl)cc(-n3nc(C#N)c(=O)[nH]c3=O)cc2Cl)n[nH]c1=O
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
CC(=O)O
acetic acid

Reagents

None

Solvents

O
water
Cl
hydrochloric acid

Conditions

Temperature
0°CELSIUS
Detailed conditions
See reaction.notes.procedure_details.

Workup

  1. 1
    OtherThe product that precipitated
  2. 2
    Filtrationwas collected by filtration
  3. 3
    Washwashed with water and petroleum ether
  4. 4
    Otherair-dried under house vacuum for 15 min
  5. 5
    Otherdried under vacuum

Procedure

A solution of 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) (1.35 g, 2.99 mmol) in glacial acetic acid (30 mL) and concentrated hydrochloric acid (6.7 mL) was heated to 120° C. for 3 d. At this time, the reaction was cooled to 0° C., diluted with water (50 mL) and stirred at 0° C. for 15 min. The product that precipitated was collected by filtration, washed with water and petroleum ether, air-dried under house vacuum for 15 min, and then dried 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-carboxylic acid (89) (1.17 g, 83%) as a light brown solid; ES(+)-HRMS m/e calcd for C17H13Cl2N5O5S (M+H)+ 470.0087, found 470.0088. Exact Mass=469.0014; Molecular weight=470.29

Source

DOI: 10.6084/m9.figshare.5104873.v1Patent: USRE046024E1uspto-grants-2016_06