반응 #56105

반응 방정식

Thionyl chloride

4-hydroxy-2-butynyl 4-cyano-3,4-diphenylbutyrate

→

title compound

수율 25.0%

4-Chloro-2-butynyl 4-Cyano-3,4-diphenylbutyrate

수율 25.0%

용매

pyridine

ether

methylene chloride

반응 조건

후처리

1. 1
   기타equipped with a Drierite tube
2. 2
   세척was washed sequentially with 40 ml of hydrochloric acid, 40 ml of saturated aqueous sodium bicarbonate, three 40-ml portions of water and 40 ml of saturated aqueous sodium chloride
3. 3
   건조The organic phase was dried (MgSO4)
4. 4
   여과filtered
5. 5
   기타purified by column chromatography on silica gel (hexanes/methylene chloride)

실험 절차

Thionyl chloride (3.56 g, 30.0 mmol) was added via syringe over a 5 min period to a stirred solution of 8.00 g (24.0 mmol) of 4-hydroxy-2-butynyl 4-cyano-3,4-diphenylbutyrate in 2.4 ml of pyridine at 0°. The reaction mixture was stirred at room temperature for 2 hours in a flask equipped with a Drierite tube. The mixture was diluted with 40 ml of ether and 100 ml of methylene chloride and was washed sequentially with 40 ml of hydrochloric acid, 40 ml of saturated aqueous sodium bicarbonate, three 40-ml portions of water and 40 ml of saturated aqueous sodium chloride. The organic phase was dried (MgSO4), filtered, stripped and purified by column chromatography on silica gel (hexanes/methylene chloride) to yield 2.11 g (25%) of the title compound. The infrared and nmr spectra are in accord with the assigned structure.

출처