تفاعل #1244181

معادلة التفاعل

sulfuric acid

toluene

hydrogen peroxide

isoeugenol

→

methylvanillyl ketone

المردود 48.0%

المذيبات

formic acid

formic acid

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةAfter refluxing
2. 2
   workup.ADDITIONwith mixing for 6 hours
3. 3
   أخرىthe toluene layer separated
4. 4
   استخلاصThe aqueous layer is extracted with fresh toluene
5. 5
   غسيلwashed with saturated aqueous sodium sulfate
6. 6
   تجفيفdried over anhydrous sodium sulfate
7. 7
   تركيزconcentrated

الإجراء التجريبي

A solution of 30% aqueous hydrogen peroxide (9 ml, 85.5 mm) and formic acid (16 ml, 88%) is added to a solution of isoeugenol (8.1 gm, 50 mm) in formic acid (4 ml). The reaction mixture is stirred at 35° C.-40° C. under nitrogen atmosphere for 3 hours. The resulting 1-(4-hydroxy-3-methoxyphenyl)-propane-1,2-diol-monoformate is treated with 10% aqueous sulfuric acid (125 ml.) and toluene (125 ml.). After refluxing with mixing for 6 hours, the reaction mixture is cooled to room temperature, and the toluene layer separated. The aqueous layer is extracted with fresh toluene and the toluene layers are combined, washed with saturated aqueous sodium sulfate, dried over anhydrous sodium sulfate and concentrated to give methylvanillyl ketone in 48% yield.

المصدر