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Treatment of dithranol 1 with various equivalents of acetyl chloride and Et3N in THF at room temperature afforded the corresponding acylated derivatives, such as 1‐acetyloxy‐ and 1,8‐diacetyloxy‐9(10H)‐anthracenones, 6a , and 6b , as well as 1,8,9‐triacetyloxyanthracene 7a , and 1,8,9‐triacetyloxy‐10‐acetylanthracene 7b . 1,8‐Bis(trimethylacetyloxy)‐9(10H)‐anthracenone 6c was also obtained in high yield by using pivaloyl chloride during the mild acylation. 相似文献
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