Реакция #81661

Уравнение реакции

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

Растворители

THF

ethanol

Условия реакции

Обработка

1. 1
   Концентрированиеconcentrated in vacuo
2. 2
   Другоеpartitioned between EtOAc and 1 ml of water
3. 3
   ЭкстракцияThe aqueous layer was extracted with EtOAc
4. 4
   Сушкаthe organic layer was dried over Na2SO4
5. 5
   Концентрированиеconcentrated in vacuo

Методика

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. PMR (DMSO-d6): δ1.39 (6H, s), 1.98 (2H, t, J=7.0 Hz), 2.70 (2H, t, J=7.0 Hz), 7.54 (1H, dd, J=1.5, 8.1 Hz), 7.73 (2H, d, J=8.4 Hz), 7.77 (1H, d, J=1.5 Hz), 7.90 (1H, d, J=8.1 Hz), 8.00 (2H, d, J=8.4 Hz).

Источник