反应详情

温度

60 °C

A solution of 2-chloro-3-cyclopentylidenemethylquinoline (7.6 g, 31.3 mmol) in glacial acetic acid (80 ml) at 60° C. was treated with zinc powder (4.0 g, 62.6 mmol). After stirring at 60° C. for 3 hours, the reaction mixture was cooled and then treated dropwise with 2 M sodium hydroxide solution (330 ml); the temperature being kept below 20° C. throughout. The resulting mixture was then extracted with ethyl acetate (2×250 ml). The combined organic extracts were dried over sodium sulphate then concentrated in vacuo to give a crude red oil (8 g) which was extracted with hot pentane (2×200 ml). Concentration of the combined extracts in vacuo (20° C.; 14 nmmHg) afforded 3-cyclopentylidenemethylquinoline (4 g, 31 mmol) which was used without further purification;

1. temperaturethe reaction mixture was cooled
2. custombeing kept below 20° C.
3. extractionThe resulting mixture was then extracted with ethyl acetate (2×250 ml)
4. dry with materialThe combined organic extracts were dried over sodium sulphate
5. concentrationthen concentrated in vacuo
6. customto give a crude red oil (8 g) which
7. extractionwas extracted with hot pentane (2×200 ml)