Реакция #80656

Уравнение реакции

phenol

dimethylacryloyl chloride

→

title compound

Phenyl 3,3-dimethylacrylate

Растворители

THF

THF

Условия реакции

Обработка

1. 1
   Промывкаwash) in 20 ml of dry THF
2. 2
   ДругоеThe cooling bath was then removed
3. 3
   workup.ADDITIONThe reaction mixture was then poured into 150 ml of water containing i ml of glacial acetic acid
4. 4
   ЭкстракцияThe mixture was extracted with 150 ml ether
5. 5
   Экстракцияthe ether extract
6. 6
   Промывкаwashed with saturated NaCl solution
7. 7
   Сушкаdried (MgSO4)
8. 8
   ДругоеThe solvent was removed in vacuo
9. 9
   Другоеthe residue purified by flash chromatography (silica; 5% ether in hexanes)

Методика

To an ice bath cooled solution of 1.29 g (54 mmol) of NaH (obtained from a 60% suspension in mineral oil by 3×10 ml hexane wash) in 20 ml of dry THF was added slowly under oxygen a solution of 5 g (53 mmol) of phenol in 50 ml of dry THF. The mixture was then treated with a solution of 7 g (59 mmol) of dimethylacryloyl chloride in 30 ml of dry THF. The cooling bath was then removed and the mixture was stirred for a further 2.5 h. The reaction mixture was then poured into 150 ml of water containing i ml of glacial acetic acid. The mixture was extracted with 150 ml ether and the ether extract washed with saturated NaCl solution and then dried (MgSO4). The solvent was removed in vacuo and the residue purified by flash chromatography (silica; 5% ether in hexanes) to give the title compound as a yellow oil. PMR (CDCl3)): & 1.99 (3H, s), 2.24 (3H, s), 5.93 (1H, broad s), 7.10 (2H, d, J-7.8 Hz) 7.22 (1H, t, J-7.8 Hz), 7.38 (2H, t, J-7.8 Hz). 4,4-Dimethyl-2-oxo-chroman (Compound 38)

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