Anodic oxidation of pyrones and coumarins.
作者:ATSUKO NISHIYAMA、HIDEO ETO、MASANOBU IGUCHI、SHOSUKE YAMAMURA
DOI:10.1248/cpb.31.2853
日期:——
Triacetic lactone, 4-hydroxycoumarins and 2-chloromethyl-5-hydroxy-4-pyrone were subjected to anodic oxidation in methanol containing LiClO4 or NaCN to afford the corresponding methoxy or cyano compounds. In basic media, however, bispyrone and biscoumarol were produced from triacetic lactone (4-hydroxy-6-methyl-2-pyrone) and 4-hydroxycoumarin, respectively. The formation processes of these oxidation products are discussed.
三甲基内酯、4-羟基香豆素和2-氯甲基-5-羟基-4-吡喃酮在含LiClO4或NaCN的甲醇中进行阳极氧化,分别得到相应的甲氧基或氰基化合物。但在碱性介质中,三甲基内酯和4-羟基香豆素分别生成联吡喃酮和联香豆素。并对这些氧化产物的形成过程进行了讨论。