ClC12[O:8]C1CCC(Cl)(F)C2.[CH:11]([C:13]1(O)[C:18]([Cl:20])([Cl:19])[CH2:17][CH2:16][CH2:15][C:14]1([Cl:22])Cl)=[CH2:12].[OH-].[Na+]>O>[Cl:22][C:14]12[O:8][CH:15]1[CH2:16][CH2:17][C:18]([Cl:20])([Cl:19])[CH:13]2[CH:11]=[CH2:12]The same procedure was employed as for the preparation of 2e in Example 17: it was performed with 1.14 g (4.32 mmol) of pure alcohol 1k, 12 cm3 of distilled water and 0.5 g (12.5 mmol) of sodium hydroxide; reaction time was 1 h 15 min; ether extraction (4×25 cm3); the crude product was employed as such (crude yld=90.5%) or purified by flash chromatography on silica (eluent: ether/petroleum ether=3/97): 0.88 g of epoxide 2i were obtained, that was a 90% yield (macrobore GC purity>98.6%)
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