반응 #93950

반응 방정식

tetrahydro-4H-pyran-4-one

3,4,5-trimethoxybenzaldehyde

→

Tetrahydro-3,5-bis[(3,4,5-trimethoxyphenyl)methylene]-4H-pyran-4-one

용매

EtOH

HCl

반응 조건

후처리

1. 1
   온도heated
2. 2
   온도at reflux for 3 hours
3. 3
   기타The product gradually precipitates from the cooled solution

실험 절차

A solution of 6.0 g (0.06 mole) of tetrahydro-4H-pyran-4-one and 25 g (0.127 mole) of 3,4,5-trimethoxybenzaldehyde in 75 ml of EtOH and 10 ml of concentrated HCl is stirred and heated at reflux for 3 hours. The product gradually precipitates from the cooled solution. The yield of yellow crystals is 12.0 g (44%), m.p. 187°-189°.

출처