Reaktion #741014

Reaktionsgleichung

1,2,3,4-tetrahydro-1,1,4,4-tetramethylnaphthalene

chlorosulfonic acid

→

5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphthalene-2-sulfonyl chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled to room temperature
2. 2
   Extraktionextracted with ether
3. 3
   WaschenThe organic phase was washed
4. 4
   Trocknendried over magnesium sulfate
5. 5
   Sonstigeevaporated under reduced pressure
6. 6
   SonstigeRecrystallization of the residue from methanol

Vorschrift

94.0 g (0.5 mol) of 1,2,3,4-tetrahydro-1,1,4,4-tetramethylnaphthalene were stirred into 100 ml of chlorosulfonic acid at 20° C. within 30 min. The reaction solution was maintained at 60° C. for 1 hour, cooled to room temperature and then poured into 1.5 l of ice and extracted with ether. The organic phase was washed to neutrality with brine and water, dried over magnesium sulfate and evaporated under reduced pressure. Recrystallization of the residue from methanol yielded 55.0 g of 5,6,7,8-tetrahydro-5,5,8,8-tetramethylnaphthalene-2-sulfonyl chloride of melting point 71°-74° C.

Quelle