Base-catalyzed reactions of dihydromethylenomycin A and its derivatives.
作者:SHIGEO AMEMIYA、KOICHI KOJIMA、KIYOSHI SAKAI
DOI:10.1248/cpb.32.457
日期:——
Derivatives of dihydromethylenomycin A undergo a facile cleavage of the five-membered ring ketone and a subsequent reclosure to give 3 (2H)-furanone derivatives under weakly basic conditions such as in the presence of K2CO3. The structure of a typical product was unequivocally determined by synthesis. The reaction mechanism is discussed.
在弱碱性条件下,如在 K2CO3 的存在下,二氢甲基霉素 A 的衍生物会发生五元环酮的简单裂解,随后重新封闭,生成 3 (2H) - 呋喃酮衍生物。通过合成明确确定了典型产物的结构。对反应机理进行了讨论。