Reacción #1256713

Ecuación de reacción

3,5-di-tert-butyl-4-hydroxycinnamic acid

water

→

title compound

Rendimiento 90.2%

2,6-di-tert-butyl-4-vinyl-phenol

Rendimiento 90.2%

Disolventes

DMF

Condiciones de reacción

Tratamiento posterior

1. 1
   Extracciónextracted with chloroform (100 mL)
2. 2
   OtroThe organic layer was separated
3. 3
   Secadodried over anhydrous Na2SO4
4. 4
   Filtraciónfiltered
5. 5
   Concentraciónconcentrated in vacuo
6. 6
   OtroThe crude product was purified by flash chromatography on silica gel eluting with hexane

Procedimiento

A solution of 3,5-di-tert-butyl-4-hydroxycinnamic acid (2.77 g, 10 mmol) in dry DMF (20 mL) was refluxed at 150° C. under N2 for 2 h with stirring. The resulting mixture was then poured into water (200 mL) and extracted with chloroform (100 mL). The organic layer was separated, dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The crude product was purified by flash chromatography on silica gel eluting with hexane, to give 2.094 g (90.2%) of the title compound as a colorless solid: mp 51-51.5° C.; 1H NMR (400 MHz, CDCl3): δ 7.248 (s, 2H), 6.666 (d×d, 1H, J1=10.8 Hz, J2=17.6 Hz), 5.587 (d, 1H, J=16.8 Hz), 5.241 (s, 1H), 5.094 (d, 1H, J=10.8 Hz), 1.456 (s, 18H); 13C NMR (100 MHz, CDCl3): δ 153.980, 137.529, 136.055, 129.040, 123.216, 110.996, 34.565, 30.507; Anal. Calcd. for C16H24O: C, 82.70; H, 10.41. Found; C, 83.08; H, 10.37.

Fuente