反应详情

温度

-20 °C

A mixture of 3.23 ml (0.02 mol) of 2-benzylpyridine in 15 ml of diethyl ether was cooled to −20° C. and 13 ml of n-butyllithium (1.6M in hexane, 0.02 mol) were subsequently added while stirring. The mixture was allowed to come to room temperature, stirred for another one hour and subsequently cooled to −60° C. A solution of 2.8 g (0.021 mol) of 1-indanone in 10 ml of diethyl ether was subsequently added while maintaining the temperature. The mixture was allowed to warm to room temperature, stirred for a further 3.5 hours and hydrolyzed with 40 ml of dilute hydrochloric acid. The solid which had precipitated was filtered off, the organic phase was separated off and the aqueous phase was extracted twice with ethyl acetate. The aqueous phase was then neutralized with aqueous ammonia solution and extracted three times with 30 ml each time of methylene chloride. The organic phases were combined, dried over magnesium sulfate, the magnesium sulfate was filtered off and the solvent was distilled off. Recrystallization of the residue obtained in this way from hexane gave 1.9 g (34%) of [2-(1H-inden-3-yl)(phenyl)-methyl]pyridine.

1. customto come to room temperature
2. stirringstirred for another one hour
3. temperaturesubsequently cooled to −60° C
4. temperaturewhile maintaining the temperature
5. temperatureto warm to room temperature
6. customThe solid which had precipitated
7. filtrationwas filtered off
8. customthe organic phase was separated off
9. extractionthe aqueous phase was extracted twice with ethyl acetate
10. extractionextracted three times with 30 ml each time of methylene chloride
11. dry with materialdried over magnesium sulfate
12. filtrationthe magnesium sulfate was filtered off
13. distillationthe solvent was distilled off
14. customRecrystallization of the residue
15. customobtained in this way from hexane