反应详情

To a solution of 4.0 g of rac-(1R*,2R*,4R*)-(2-hydroxy-5-phenyl-bicyclo[2.2.2]oct-5-en-2-yl)-acetic acid tert.-butyl ester dissolved in 25 mL EtOH were added 2.1 g of LiOH.H2O, 8 mL H2O and 22 mL MeOH. The reaction mixture was stirred at rt for 3 days and then concentrated. The residue was partitioned between water and Et2O. The aq. layer was separated and acidified with 1N HCl resulting in the formation of a white solid. The solid was filtrated, washed with 5 mL dil. HCl and dried in vacuo to obtain 3.19 g of rac-(1R*,2R*,4R*)-(2-hydroxy-5-phenyl-bicyclo[2.2.2]oct-5-en-2-yl)-acetic acid as white solid.

1. concentrationconcentrated
2. customThe residue was partitioned between water and Et2O
3. customThe aq. layer was separated
4. filtrationThe solid was filtrated
5. washwashed with 5 mL dil. HCl
6. customdried in vacuo