Reacción #1929005

Ecuación de reacción

8-chloro-1-octanol

pyridine

SOCl2

→

Polymer 9

Rendimiento 95.0%

Chlorooctane

Rendimiento 95.0%

Disolventes

THF

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe Schlenk was connected to a trap with a NaOH solution (2M) for absorption of HCl and SO2
2. 2
   TemperaturaThe temperature was slowly increased
3. 3
   workup.DISTILLATIONExcess of SOCl2 and THF were distilled off under vacuum at 50° C. for 30 minutes
4. 4
   workup.ADDITIONThen freshly distilled THF (30 ml) was added
5. 5
   workup.DISSOLUTIONto dissolve the acylated polymer
6. 6
   workup.DISSOLUTIONAfter 30 minutes needed for complete dissolution of polymer
7. 7
   OtroThe polymer was recovered
8. 8
   Otroby precipitating
9. 9
   workup.DISTILLATIONinto distilled water
10. 10
    OtroThe product purification
11. 11
    workup.DISSOLUTIONwas made by dissolution in hot CH2Cl2
12. 12
    Otroprecipitation in ethanol
13. 13
    Otrodrying at 50° C. in vacuum oven

Procedimiento

1 g (0.0015 mol, equivalent weight=666 gram per mole repeat unit) polymer 5 was placed into a 50 ml Schlenk and dissolved in THF anhydrous (30 ml). The Schlenk was connected to a trap with a NaOH solution (2M) for absorption of HCl and SO2. Then pyridine anhydrous 0.5 ml (0.0062 mol), and SOCl2 0.3 ml (0.0041 mol) were added dropwise at room temperature into the Schlenk. The temperature was slowly increased and maintained at 60° C. for 3 h. Excess of SOCl2 and THF were distilled off under vacuum at 50° C. for 30 minutes, the resulting crude acid chloride polymer. Then freshly distilled THF (30 ml) was added to dissolve the acylated polymer. After 30 minutes needed for complete dissolution of polymer, a solution of excess 8-chloro-1-octanol 1.05 ml (2 mol.eq, 0.0062 mol) was added dropwise to the polymer solution at room temperature under vigorous stirring, and allowed to stir for 24 h. The polymer was recovered by precipitating into distilled water. The product purification was made by dissolution in hot CH2Cl2, precipitation in ethanol and drying at 50° C. in vacuum oven to obtain Polymer 9 as a brown solid (1.39 g, yield 95%) with the following characteristics:

Fuente