Water → 6-Chloro-3-[2-(methylsulfanyl)phenoxy]pyridazine 1-oxide

In a mixed solvent of 1,4-dioxane (5 mL) and dimethylsulfoxide (5 mL) was dissolved 454 mg (3.24 mmol) of 2-(methylsulfanyl)phenol, to the solution was added 519 mg (4.63 mmol) of potassium tert-butoxide and the mixture was stirred for 35 minutes. To the mixture was added 424 mg (2.57 mmol) of 3,6-dichloropyridazine 1-oxide and the resulting mixture was stirred for 3 hours. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layers were combined, washed with brine, and dried over anhydrous magnesium sulfate. The solvent was removed, and the obtained residue was purified by silica gel chromatography (Wakogel C-100, eluted with hexane:ethyl acetate=3:1) to obtain 391 mg (1.46 mmol, Yield: 56.8%) of 6-chloro-3-[2-(methylsulfanyl)phenoxy]pyridazine 1-oxide.

1. stirringthe resulting mixture was stirred for 3 hours
2. extractionextracted with ethyl acetate
3. washwashed with brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was removed
6. customthe obtained residue was purified by silica gel chromatography (Wakogel C-100, eluted with hexane:ethyl acetate=3:1)

ORD-Eintrag

ord-90620fe223434362948d5aa094bb8a12

Quelldatensatz

uspto-grants-2009_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07608563B2