反応 #1325

反応方程式

ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate

Compound 1

ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate

LiOH

→

title compound

4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoic acid

溶媒

THF

ethanol

反応条件

後処理

1. 1
   濃縮concentrated in vacuo
2. 2
   その他partitioned between EtOAc and 1 ml of water
3. 3
   抽出The aqueous layer was extracted with EtOAc
4. 4
   乾燥the organic layer was dried over Na2SO4
5. 5
   濃縮concentrated in vacuo

実験手順

To a suspension of 0.30 g (0.87 mmol) of ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate (Compound 1) in 4 ml of THF and 2 ml of ethanol was added 2 ml (2 mmol) of LiOH (1N aqueous solution). The reaction mixture was stirred at room temperature for 4 hours, concentrated in vacuo to near dryness, partitioned between EtOAc and 1 ml of water and acidified to pH 4 with 10% HCl. The aqueous layer was extracted with EtOAc and then the organic layer was dried over Na2SO4 and concentrated in vacuo to give the title compound as a light yellow solid.

出典