반응 #56104

반응 방정식

water

4-cyano-3,4-diphenylbutyryl chloride

2-butyn-1,4-diol

pyridine

→

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

용매

benzene

THF

반응 조건

후처리

1. 1
   기타equipped with a Drierite tube
2. 2
   기타the layers were separated
3. 3
   추출Two 60-ml ether extractions of the aqueous layer
4. 4
   세척were washed twice with 100 ml of H2O, with 100 ml saturated aqueous sodium bicarbonate
5. 5
   workup.STIRRINGwith 100 ml saturated aqueous sodium chloride and were stirred over MgSO4
6. 6
   기타purified by column chromatography on silica gel (hexanes/methylene chloride)
7. 7
   기타to give two fractions

실험 절차

A solution of 10.7 g (0.038 mol) of 4-cyano-3,4-diphenylbutyryl chloride in 30 ml of benzene was added over a 45 minute period to a stirred solution of 6.5 g (0.076 mol) of 2-butyn-1,4-diol and 3.4 ml of pyridine in 100 ml of THF at 0°. The reaction mixture was stirred for 24 hours at room temperature in a flask equipped with a Drierite tube. The solution was poured into 50 ml of water and the layers were separated. Two 60-ml ether extractions of the aqueous layer were combined with the THF layer, were washed twice with 100 ml of H2O, with 100 ml saturated aqueous sodium bicarbonate, and with 100 ml saturated aqueous sodium chloride and were stirred over MgSO4. The filtered solution was stripped and purified by column chromatography on silica gel (hexanes/methylene chloride) to give two fractions weighing 12.6 g (47%) having different isomer ratios as determined from the nmr spectra. The infrared and nmr spectra are in accord with the assigned structure.

출처