反应详情

温度

100 °C

To a solution of 2-oxaspiro[4.4]nonane-1,3-dione (3 g, 19.46 mmol) in toluene (2 ml), BnOH (2.023 ml, 19.46 mmol) was added. The reaction mixture was allowed to stir at 100° C. for 19 hours, and the reaction mixture was concentrated under reduced pressure. The obtained residue was recrystallized in DCM (15 ml) and 2,2,4-trimethylpentane (100 ml). The obtained colorless crystal was washed with a 10% solution of DCM/heptane (20 ml). The obtained solid was dried under reduce pressure to give 1-(2-(benzyloxy)-2-oxoethyl)cyclopentanecarboxylic acid (3.09 g); Retention time=1.56 minutes (condition A); 1H NMR (400 MHz, CDCl3) δ ppm 1.24 (t, J=7.2 Hz, 3H) 1.58-1.81 (m, 6H) 2.19-2.25 (m, 2H) 2.75 (s, 2H) 5.11 (s, 2H) 7.28-7.37 (m, 5H) 11.80 (br s, 1H).

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. customThe obtained residue was recrystallized in DCM (15 ml)
3. washThe obtained colorless crystal was washed with a 10% solution of DCM/heptane (20 ml)
4. customThe obtained solid was dried