Réaction #487493

Équation de réaction

Dimethyl terephthalate

Stearyl Alcohol

→

white solid

Rendement 96.2%

distearyl terephthalate

Rendement 96.2%

Conditions de réaction

Traitement

1. 1
   AutreTo a 2 L Buchi reactor equipped with a double turbine agitator and distillation apparatus
2. 2
   Autrepurge for 1 hour
3. 3
   workup.ADDITIONwas commenced followed by the addition of Tyzor catalyst (3.0 grams, available from Dupont)
4. 4
   TempératureThe reaction mixture was then heated to 145° C.
5. 5
   Autreto 190° C.
6. 6
   Autreover a 3-4 hour
7. 7
   workup.DISTILLATIONis distilled in a controlled manner
8. 8
   TempératureThe reaction temperature was maintained at 190° C. for an additional 16 hours until >96% conversion to the product
9. 9
   Températureon cooling

Mode opératoire

To a 2 L Buchi reactor equipped with a double turbine agitator and distillation apparatus was charged Dimethyl terephthalate (315.8 grams), Stearyl Alcohol (879.7 grams) and heated to 130° C. under Nitrogen purge for 1 hour, after which stirring was commenced followed by the addition of Tyzor catalyst (3.0 grams, available from Dupont). The reaction mixture was then heated to 145° C., followed by slowly ramping the temperature to 190° C. over a 3-4 hour period such that the evolution of methanol is distilled in a controlled manner. The reaction temperature was maintained at 190° C. for an additional 16 hours until >96% conversion to the product was achieved as determined by 1H NMR spectroscopy. The product was discharged as a low viscosity liquid which solidified on cooling to give a 1050 gram of a white solid (96.2% yield). The product was shown to be pure by 1H NMR spectroscopy with trace amounts of the mono-ester. Physical properties of this compound are shown in Table 2.

Source