反応 #1482

反応方程式

ethylene glycol

3,4-dihydro-4,4-dimethyl-7-acetyl-naphthalen-1(2H)-one

p-toluenesulfonic acid monohydrate

3,4-dihydro-4,4-dimethyl-6-acetyl-naphthalen-1(2H)-one

→

title compound

6-(2-methyl-1,3-dioxolan-2-yl)-3,4-dihydro-4,4-dimethylnaphthalen-1(2H)-one

溶媒

benzene

反応条件

後処理

1. 1
   温度The resulting solution was heated
2. 2
   温度to reflux for 18 h
3. 3
   濃縮concentrated under reduced pressure

実験手順

A solution of 1.80 g (8.34 mmol) of a 1:5 mixture of 3,4-dihydro-4,4-dimethyl-7-acetyl-naphthalen-1(2H)-one (Compound D14a); and 3,4-dihydro-4,4-dimethyl-6-acetyl-naphthalen-1(2H)-one (Compound D14b) in 50 mL benzene was combined with 517.7 mg (8.34 mmol) of ethylene glycol and 20.0 mg (0.11 mmol) of p-toluenesulfonic acid monohydrate. The resulting solution was heated to reflux for 18 h, cooled to room temperature, and concentrated under reduced pressure. The title compound was isolated by column chromatography (10% EtOAc-hexanes) as a colorless oil.

出典