Reacción #92094

Ecuación de reacción

(R,R,R)-3-(3-hydroxy-3,7,11,15-tetramethyl-hexadecyl)-5-methyl-2-propyl-benzene-1,4-diol

ACN

DCM

CAN

→

(R,R,R)-3-(3-hydroxy-3,7,11,15-tetramethyl-hexadecyl)-5-methyl-2-propyl-[1,4]benzoquinone

Rendimiento 45.2%

Disolventes

water

water

Condiciones de reacción

Tratamiento posterior

1. 1
   Otroresulting in a bright orange solution
2. 2
   LavadoThe aqueous layer was washed with DCM (3×30 mL)
3. 3
   SecadoThe combined DCM layers were dried over Na2SO4
4. 4
   Filtraciónfiltered
5. 5
   Concentraciónconcentrated by rotary evaporation
6. 6
   Otroto yield an orange oil
7. 7
   OtroThe oil was purified by column chromatography (gradient—hept to 20:1 hept.:EtOAc)

Procedimiento

A 50 mL RBF flask was charged with (R,R,R)-3-(3-hydroxy-3,7,11,15-tetramethyl-hexadecyl)-5-methyl-2-propyl-benzene-1,4-diol (Ex-1E-5) (110 mg, 0.24 mmol), ACN (15 mL) and DCM (2 mL), then cooled to 0° C. A solution of CAN (269 mg, 0.49 mmol) in water (1 mL) was added dropwise over 1 min to the reaction resulting in a bright orange solution. The reaction was stirred for 15 min then was diluted with water (5 mL). The aqueous layer was washed with DCM (3×30 mL). The combined DCM layers were dried over Na2SO4, filtered and concentrated by rotary evaporation to yield an orange oil. The oil was purified by column chromatography (gradient—hept to 20:1 hept.:EtOAc) to yield (R,R,R)-3-(3-hydroxy-3,7,11,15-tetramethyl-hexadecyl)-5-methyl-2-propyl-[1,4]benzoquinone (Ex-1E-6) as an orange oil (50 mg, 44%). 1H NMR (400 MHz, CDCl3) δ (ppm): 6.56 (s, 1H), 2.58-2.54 (m, 2H), 2.45 (t, J=7.9 Hz, 2H), 2.04 (s, 3H), 1.55-1.04 (m, 26H), 1.00 (t, J=7.4 Hz, 3H), 0.89-0.85 (m, 15H).

Fuente