Reaktion #1162226

Reaktionsgleichung

3,4-dimethoxy-1,2,5-thiadiazole 1,1-dioxide

2-[(5-dimethylaminomethyl-2-furyl)methylthio]ethylamine

allylamine

→

title compound

3-Allylamino-4-{2-[(5-dimethylaminomethyl-2-furyl)methylthio]ethylamino}-1,2,5-thiadiazole 1,1-dioxide

Lösungsmittel

methanol

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturhad been cooled to 0° in an ice-water bath
2. 2
   workup.ADDITIONWhen the addition
3. 3
   SonstigeThe reaction mixture was evaporated under reduced pressure
4. 4
   Sonstigechromatographed
5. 5
   Waschena gradient elution of methylene chloride-methanol
6. 6
   Sonstigeevaporated under reduced pressure
7. 7
   Sonstigethe residue crystallized with isopropyl alcohol

Vorschrift

To a partial suspension of 3,4-dimethoxy-1,2,5-thiadiazole 1,1-dioxide (2.08 g; 11.7 mmoles) in 200 ml of methanol that had been cooled to 0° in an ice-water bath was added dropwise over a period of 45 minutes a solution of 2-[(5-dimethylaminomethyl-2-furyl)methylthio]ethylamine in 30 ml of methanol. When the addition was completed, 10.5 ml of allylamine was added and the solution was allowed to stir at ambient temperature for 18 hours. The reaction mixture was evaporated under reduced pressure and the residue was placed on 120 g of silica gel and chromatographed using a gradient elution of methylene chloride-methanol. The appropriate fractions were combined, evaporated under reduced pressure and the residue crystallized with isopropyl alcohol to give the title compound, mp 83°-86°; the NMR spectrum (100 MHz) in d6 dimethyl sulfoxide showed the presence of approximately 0.9 moles of isopropyl alcohol.

Quelle