Réaction #955903

Équation de réaction

isosorbide

malic acid

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product

Rendement 98.5%

Isosorbide Malic Acid

Rendement 98.5%

Conditions de réaction

Traitement

1. 1
   AutreTo a 3-neck 250 mL round-bottomed flask equipped with a dean stark trap and a condenser
2. 2
   TempératureThe temperature was then raised to 180° C.
3. 3
   Autrecondensation
4. 4
   Autrebegan around 150° C
5. 5
   AutreA total of 3.0 mL water was collected in the dean stark trap
6. 6
   TempératureThe reaction mixture was cooled under argon to ˜100° C.
7. 7
   Températurecooled to room temperature

Mode opératoire

To a 3-neck 250 mL round-bottomed flask equipped with a dean stark trap and a condenser was added isosorbide (40.0 g, 273.9 mmol, obtained from Archer Daniels), malic acid (30.60 g, 228.22 mmol, obtained from Sigma-Aldrich), and FASCAT 4201 dibutyl tin oxide catalyst (0.07 g, 0.1 wt %, obtained from Arkema Inc.). The mixture was slowly heated under argon to 120° C., during which time the reagents melted. The temperature was then raised to 180° C., and condensation began around 150° C. The reaction mixture was stirred at 180° C. overnight (˜20 h). A total of 3.0 mL water was collected in the dean stark trap. The reaction mixture was cooled under argon to ˜100° C. and discharged into an aluminum tray and cooled to room temperature to give 63 g of product as a glassy material. Tg(DSC)=23.2° C.; viscosity @130° C.=1019 cps; viscosity @70° C.=8.08×105 cps. Mn(GPC)=567; Mw(GPC)=868; Pd(GPC)=1.53.

Source