Réaction #1482

Équation de réaction

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

Solvants

benzene

Conditions de réaction

Traitement

1. 1
   TempératureThe resulting solution was heated
2. 2
   Températureto reflux for 18 h
3. 3
   Concentrationconcentrated under reduced pressure

Mode opératoire

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.

Source