反应详情

温度

0 °C

The 8-hydroxy product of Example 1 (15 g.) was added portionwise to thionyl chloride (33 g.) at 0° C and the mixture stirred at 0° C for 1 hour and heated at reflux for an additional 2 hours. The solvent was removed in vacuo and the residual oil heated at reflux for 1 hour with ethanol (15 ml.) to remove excess thionyl chloride. The resultant precipitate was recrystallised from ethanolether to give 8-chloro-3-methyl-5,6,7,8-tetrahydroquinoline hydrochloride as colourless needles (17.4 g.) m.p. 177° C.

1. temperatureheated
2. temperatureat reflux for an additional 2 hours
3. customThe solvent was removed in vacuo
4. temperaturethe residual oil heated
5. temperatureat reflux for 1 hour with ethanol (15 ml.)
6. customto remove excess thionyl chloride
7. customThe resultant precipitate was recrystallised from ethanolether