反应详情

Water (100 ml) and CaCO3 (18 g, 180 mmole) were added to a solution of 13 in dioxane (100 ml) and the mixture was refluxed for 10 hr. The solution was cooled and the dioxane was removed under reduced pressure and the mixture was acidified with 1N HCl and extracted with methylene chloride. The combined methylene chloride fractions were washed with saturated solution of NaHCO3, H2O, brine, dried over anhydrous magnesium sulfate, and evaporated in vacuo to give a white solid which when crystallized from hexane afforded 7 g of 24 (84.3%). A single component was detected by TLC (100% hexane, Rf, 0; hexane/ethyl acetate 80:20, Rf, 0.5); NMR (CDCl3) d 2.1 (m, 1H, H--O), d 5.0 (s, 2H, CH2 --OH), d 7.4-8.4 (m, 6H, naphthyl); MS (HRFAB) calcd for C11H9BrO (M+Li)+ 243.0003 found 243.0003.

1. temperaturethe mixture was refluxed for 10 hr
2. temperatureThe solution was cooled
3. customthe dioxane was removed under reduced pressure
4. extractionextracted with methylene chloride
5. washThe combined methylene chloride fractions were washed with saturated solution of NaHCO3, H2O, brine
6. dry with materialdried over anhydrous magnesium sulfate
7. customevaporated in vacuo
8. customto give a white solid which when
9. customcrystallized from hexane