Tandem Aza-Michael-Condensation-Aldol
Cyclization Reaction: Approach to the Construction of DE Synthon
of (±)-Camptothecin
作者:Subhash Chavan、Abasaheb Dhawane、Uttam Kalkote
DOI:10.1055/s-0028-1083539
日期:——
An efficient synthesis of the DE ring of camptothecin, employing a Reformatsky and a tandem one-pot, three-step trans- formation involving aza-Michael reaction, condensation with ethyl malonyl chloride followed by intramolecular 'aldol' reaction to fur- nish the dihydropyridone derivative from commercially available starting materials, has been achieved.
喜树碱 DE 环的有效合成,采用 Reformatsky 和串联一锅三步转化,包括 aza-Michael 反应,与乙基丙二酰氯缩合,然后进行分子内“羟醛”反应以提供二氢吡啶酮衍生自市售原料,已经实现。