Treatment of 4-oxochromen-2-carbonyl chloride with dimethylcadmium gave 1-methyl-1-(4-oxochromen-2-yl)-ethyl 4-oxochromen-2-carboxylate (11) which was synthesized unequivocally and degraded to the carboxylic acid and 2-(1-methylvinyl)chromen-4-one. 2-Acetylchromen-4-one was synthesized by a new and more efficient method from 4-oxochromen-2-carbonyl chloride.
用二甲基
镉处理4-氧代色素-2-羰基
氯,得到1-甲基-1-(4-氧代色素-2-基)-乙基4-氧代色素-2-
羧酸酯(11),该化合物明确合成并降解为
羧酸和2-(1-甲基
乙烯基)色烯-4-酮。由4-氧代色原-2-羰基
氯通过一种新的更有效的方法合成了2-乙酰基色n-4-酮。