反应详情

50 g. of 1,2,3,4,9,9-hexachloro-1,4,4a,8a-tetrahydro-1,4-methanonaphthalene-5,8-dione were dissolved in 300 ml. of methanol and 3 g. of pyridine were added. The mixture was refluxed until the yellow color disappeared (about 5 hours). Upon cooling to 5°-7°C., white crystals separated. One recrystallization from methanol gave white crystals, m.p. 186°C. The yield was almost quantitative.

1. temperatureThe mixture was refluxed until the yellow color
2. custom(about 5 hours)
3. temperatureUpon cooling to 5°-7°C.
4. customwhite crystals separated
5. customOne recrystallization from methanol
6. customgave white crystals, m.p. 186°C