反应详情

To benzyl cyanide (1.970 ml, 19.39 mmol) was added THF (100 ml) and the solution cooled to −78° C. n-butyllithium (2.5 M in hexanes, 7.84 ml, 19.59 mmol) was added dropwise over 20 min via syringe pump and the solution stirred 30 min. Tetrahydro-4H-pyran-4-one (1.791 ml, 19.39 mmol) was added over 20 min via syringe pump and the solution stirred for 3 hours. The reaction was quenched by addition of ice-cold satd. NH4Cl and then partitioned between cold satd. NH4Cl and CH2Cl2. The aqueous portion was extracted 2×CH2Cl2, dried (Na2SO4), and concentrated in vacuo. Took up material in CH2Cl2 and allowed to crystallize over the weekend. The crystals were washed with diethyl ether and used without further purification. 3.14 g, 81%.

1. additionwas added dropwise over 20 min via syringe pump
2. stirringthe solution stirred for 3 hours
3. customThe reaction was quenched by addition of ice-cold satd
4. customNH4Cl and then partitioned between cold satd
5. extractionThe aqueous portion was extracted 2×CH2Cl2
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated in vacuo
8. customto crystallize over the weekend
9. washThe crystals were washed with diethyl ether
10. customused without further purification