Réaction #92084

Équation de réaction

1-chloromethyl-2,5-dimethoxy-3,4,6-trimethyl-benzene

ACN

CAN

→

2-chloromethyl-3,5,6-trimethyl-[1,4]benzoquinone

Rendement 81.0%

Solvants

water

Conditions de réaction

Traitement

1. 1
   ExtractionAfter 1 h the reaction mixture was extracted with MTBE (3×50 mL)
2. 2
   LavageThe combined MTBE layers were then washed with water (50 mL)
3. 3
   Séchagedried over MgSO4
4. 4
   Filtrationfiltered
5. 5
   Concentrationconcentrated by rotary evaporation

Mode opératoire

A flask was charged with 1-chloromethyl-2,5-dimethoxy-3,4,6-trimethyl-benzene (Ex-1B-3) (6.37 g, 27.9 mmol) and ACN (10 mL) then cooled to 0° C. A solution of CAN (31.3 g, 57.1 mmol) in water (10 mL) was added to the flask. After 1 h the reaction mixture was extracted with MTBE (3×50 mL). The combined MTBE layers were then washed with water (50 mL), dried over MgSO4, filtered and concentrated by rotary evaporation. Trituration of the crude product with MeOH yielded 4.49 g of 2-chloromethyl-3,5,6-trimethyl-[1,4]benzoquinone (Ex-1B-4) (81%) as a bright orange-yellow solid. 1H NMR (400 MHz, CDCl3) δ (ppm): 4.77 (s, 2H), 2.17 (s, 3H), 2.07 (s, 3H), 2.06 (s, 3H).

Source