反应详情

In an eggplant flask having a ground-in stopper and equipped with a condenser were charged 2-iodo-3-nitrotoluene (6) as obtained in Preparation Example 3 and an equivalent weight of a copper powder, and the contents were stirred in an oil bath at 200° C. for 10 hours. The mixture was extracted with benzene by means of a Soxhlet extractor. The solvent was removed from the extract by distillation under reduced pressure, and the resulting crude crystal was recrystallized from 99% ethanol to obtain 6,6'-dimethyl-2,2'-dinitro-1,1'-biphenyl (7) as a black needle-like crystal having a melting point of 107.4° to 108.3° C. and a 73% yield.

1. customIn an eggplant flask having
2. customa ground-in stopper and equipped with a condenser
3. customas obtained in Preparation Example 3
4. extractionThe mixture was extracted with benzene by means of a Soxhlet extractor
5. customThe solvent was removed from the
6. extractionextract by distillation under reduced pressure
7. customthe resulting crude crystal was recrystallized from 99% ethanol