Reacción #431815

Ecuación de reacción

toluenesulfonyl isocyanate

dibutyltin dilaurate

→

succinic anhydride

diethanolamine

Disolventes

tetrahydrofuran

tetrahydrofuran

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturathe mixture was refluxed for one hour
2. 2
   Otrothe solution obtained
3. 3
   workup.ADDITIONwas added dropwise to a mixture of 7.6 g of the monoamide

Procedimiento

17.8 g of polypropylene glycol (M=480), 0.24 g of toluenesulfonyl isocyanate and 150 g of anhydrous tetrahydrofuran were stirred for 15 minutes in a three-necked flask with a capacity of 250 ml. 13.0 g of tolylene 2,4-diisocyanate and 0.17 g of dibutyltin dilaurate were then added, the mixture was refluxed for one hour, and the solution obtained was added dropwise to a mixture of 7.6 g of the monoamide formed from 1 mol of succinic anhydride and 1 mol of diethanolamine in 184 g of tetrahydrofuran and heated for 22 hours under reflux until isocyanate was no longer present in the solution. A weight average of the molecular weight (Mw) of 8500 was determined with the aid of gel permeation chromatography (polystyrene standard).

Fuente