Réaction #586116

Équation de réaction

4-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene-2-carbaldehyde

sodium hydride

2-methoxyethyl chloride

→

5,5,8,8-Tetramethyl-4-(2-methoxyethoxy)-5,6,7,8-tetrahydronaphthalene-2-carbaldehyde

Rendement 95.0%

Solvants

DMF

Conditions de réaction

Traitement

1. 1
   workup.STIRRINGthe medium is stirred at room temperature for 2 hours
2. 2
   Extractionhydrolysed and extracted with ethyl ether
3. 3
   LavageThe organic phase is washed with 1N sodium hydroxide solution
4. 4
   AutreThe residue obtained
5. 5
   Autreis purified by chromatography (eluent:heptane)
6. 6
   AutreA yellow oil is obtained (m=42.7 g; yield=95%)

Mode opératoire

34 g (148 mmol) of 4-hydroxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene-2-carbaldehyde are dissolved in 400 mL of anhydrous DMF. 7.2 g (178 mmol) of 60% sodium hydride are then added portionwise, and the reaction medium is stirred for 1 hour. 16.5 mL (178 mmol) of 2-methoxyethyl chloride are added dropwise, and the medium is stirred at room temperature for 2 hours and then hydrolysed and extracted with ethyl ether. The organic phase is washed with 1N sodium hydroxide solution and then three times with water. The residue obtained is purified by chromatography (eluent:heptane). A yellow oil is obtained (m=42.7 g; yield=95%).

Source