Réaction #648442

Équation de réaction

N-methylpyrrolidinone

1,4-butanediol

dibutyltin dilaurate

N-methylpyrrolidinone

4,4′-diphenylmethane diisocyanate

N-methylpyrrolidinone

polytetramethylene glycol

N-methylpyrrolidinone

→

urethane urea

Rendement 77.2%

Solvants

diethyl ether

methanol

Conditions de réaction

Traitement

1. 1
   workup.ADDITIONAfter the completion of the dropwise addition
2. 2
   Autrethe solution was reacted at 50° C. for 2 hours
3. 3
   Autrefollowed by reaction at 0° C. for 0.5 hour
4. 4
   AutreAfter the completion of the reaction
5. 5
   Autrefollowed by reaction at 50° C. overnight
6. 6
   AutreThe resultant reaction solution
7. 7
   Filtrationfiltered
8. 8
   Autredried under reduced pressure

Mode opératoire

In an argon atmosphere, 1,4-butanediol (0.240 g, 2.66 mmol) and dibutyltin dilaurate (0.2 ml) were dissolved in N-methylpyrrolidinone (7.00 ml) in a three-necked flask. A solution of 4,4′-diphenylmethane diisocyanate (2.00 g, 7.99 mmol) in N-methylpyrrolidinone (7.00 ml) was slowly added dropwise to the solution at room temperature. After the completion of the dropwise addition, the solution was reacted at 50° C. for 2 hours. Thereafter, a solution of the compound (6) from Example 1 (1.69 g, 2.66 mmol) in N-methylpyrrolidinone (3.00 ml) was slowly added dropwise to the reaction solution at 0° C., followed by reaction at 0° C. for 0.5 hour. After the completion of the reaction, a solution of polytetramethylene glycol (2.66 g, 2.66 mmol) in N-methylpyrrolidinone (3.00 ml) was slowly added dropwise to the reaction solution at 0° C., followed by reaction at 50° C. overnight. The resultant reaction solution was poured into an excess of a solvent mixture (methanol:diethyl ether=1:1 (by volume)). The precipitate caused was suction filtered and dried under reduced pressure to give a segmented poly(urethane-urea) with a phosphorylcholine group represented by Formula SPUU-2 above as a brown solid (weight: 5.09 g, yield: 77.2%). The structure of the polymer was determined from the IR spectrum given below. From the 1H-NMR spectrum, the phosphorylcholine group content in the polymer SPUU-2 was found to be 19.7 mol %.

Source