Copper(II) acetylacetonate-catalyzed decomposition of o-methoxy-carbonyl-α-diazoacetophenone in benzene in the presence of carbonyl compounds gave 1,3-dipolar cycloadducts of l-methoxy-2-benzopyrylium-4-olate with carbonyl compounds in high yields.
在羰基化合物存在下,
乙酰丙酮铜 (II) 催化苯中邻甲氧基-羰基-α-重氮
苯乙酮的分解得到 1,3-偶极环加合物 l-甲氧基-2-苯并pyrylium-4-olate 与羰基化合物在高浓度下产量。