反应详情

温度

60 °C

A mixture of 2 g methyl 2-chloro-cis-5a,6,7,8,9,9a-hexahydrodibenzofuran-4-carboxylate in 30 ml 1N sodium hydroxide and 5 ml dioxane is stirred at 60° C. for 5 hours. This is then diluted with water, filtered, acidified with acetic acid, extracted with ethyl acetate, dried over magnesium sulfate and evaporated to dryness to obtain an oily product which crystallizes on standing. This is recrystallyzed to obtain 2-chloro-cis-5a,6,7,8,9,9a-hexahydrodibenzo-furan-4-carboxylic acid. (M.P. 132°-134° C.)

1. filtrationfiltered
2. extractionextracted with ethyl acetate
3. dry with materialdried over magnesium sulfate
4. customevaporated to dryness
5. customto obtain an oily product which
6. customcrystallizes