反应详情

These monomers are commercially available or can be prepared by a simple modification. A very suitable monomer is α,α'-dibromo-2-cyano-p-xylene (see formula V of FIG. 2), which can be prepared by refluxing a mixture of 2,5-dimethylbenzonitryl, N-bromosuccinimide and benzoyl peroxide in carbon tetrachloride for several hours. The solid formed is recrystallized from a mixture of petroleum ether and toluene and subsequently dried under a vacuum. Another suitable monomer is α,α'-dibromo-2-methoxy-p-xylene (see formula VI of FIG. 2), which can be prepared by refluxing a mixture of 2,5-dimethylanisol, N-bromosuccinimide and benzoyl peroxide in carbon tetrachloride in a nitrogen atmosphere for several hours. The solid formed is recrystallized from hexane and subsequently dried under a vacuum.

1. customcan be prepared by a simple modification
2. customcan be prepared
3. temperatureby refluxing
4. customThe solid formed
5. customis recrystallized from a mixture of petroleum ether and toluene
6. customsubsequently dried under a vacuum
7. customcan be prepared
8. temperatureby refluxing
9. customThe solid formed
10. customis recrystallized from hexane
11. customsubsequently dried under a vacuum