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16. General procedure for acetylation: To a stirred mixture of
alcohols, amines, phenols or acid (1 mmol) and isopro-
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added iodine (5–10 mg, 0.02–0.04 mmol) with continued
stirring at the same temperature for the indicated time.
After completion of the reaction (TLC monitoring), the
mixture was cooled to room temperature and the remain-
ing iodine was destroyed by adding 5% aq solution of
sodium thiosulfate (2 ml). Diethyl ether (5–10 ml) was
added and the phases were separated. The organic phase
was washed with a saturated solution of NaHCO3 (5 ml),
dried over anhyd Na2SO4 and concentrated under vacuo.
If necessary the product was purified by column chroma-
tography on silica gel in hexane/ethyl acetate. All products
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