Reacción #701448

Ecuación de reacción

chlorine

chlorine

chlorine

methyl mercaptan

sodium hydroxide

sodium hydroxide

Acetaldoxime

→

methyl hydroxythioacetimidate

Rendimiento 83.0%

sodium methyl mercaptide

Disolventes

water

water

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturathe reaction temperature was maintained at -5° to -10° C
2. 2
   workup.ADDITIONcontaining 40 g
3. 3
   Temperaturatime period while maintaining the temperature at -10° C
4. 4
   workup.STIRRINGThe reaction mixture was stirred for an additional 15 minutes
5. 5
   FiltraciónCrystaline methyl hydroxythioacetimidate was recovered at -10° C. by filtration
6. 6
   Filtraciónfiltered
7. 7
   Otrodried

Procedimiento

Acetaldoxime (30 g., 0.5 mole) was dissolved in 200 g. of water and the solution cooled to -5 to -10° C. Over a period of 20 to 30 minutes, 30 g. of chlorine was introduced into the solution with agitation. During the chlorine addition, the reaction temperature was maintained at -5° to -10° C. An additional 6 grams of chlorine was added in 10 minutes. The mixture was stirred for 10-15 minutes at -10° C. A sodium methyl mercaptide solution was prepared by dissolving methyl mercaptan (25 g, 0.52 mole) in a caustic solution containing 40 g. of sodium hydroxide in 100 g. of water. The mercaptide solution was fed directly into the reaction mixture over a 15 to 20 minute time period while maintaining the temperature at -10° C. The reaction mixture was stirred for an additional 15 minutes and then neutralized to a pH 7.5 by addition of 50% sodium hydroxide solution. Crystaline methyl hydroxythioacetimidate was recovered at -10° C. by filtration. The product was re-slurried in hexane, filtered and dried to obtain 43 grams (83% yield) of methyl hydroxythioacetimidate, mp 87°-88° C.

Fuente