反应详情

A solution of methyl (E)-7-(2,4-dichloro-6-phenylmethoxyphenyl)-3,5-dihydroxy-6-heptenoate (34.8 g, 81.8 mmole), 1 N sodium hydroxide (82 ml, 82 mmole) and ethanol (200 ml) was stirred at 25° C. for 15 min. The reaction solution was acidified with 6 N hydrochloric acid, diluted with water (400 ml) and extracted with ether (3×200 ml). The combined organic extracts were washed with brine (3×100 ml), dried over magnesium sulfate and filtered. The filtrate was evaporated in vacuo, leaving the title compound as an orange oil (33.3 g, 99%); pmr (CDCl3) δ2.47 (2H, d), 4.30 (2H, br m), 4.98 (2H, s), 7.30 (5H, s).

1. extractionextracted with ether (3×200 ml)
2. washThe combined organic extracts were washed with brine (3×100 ml)
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. customThe filtrate was evaporated in vacuo