Synthesis of indolizinoquinolinones through three- and four-component domino Knoevenagel / hetero-Diels–Alder reactions: novel access to (+)-camptothecin
作者:Lutz F. Tietze、Matthias Bischoff、Taukeer A. Khan、Deshan Liu
DOI:10.1007/s10593-017-2070-4
日期:2017.4
The fused heterocyclic indolizinoquinolinone system is a key structural feature of several highly bioactive alkaloids, including camptothecin. Camptothecin has been efficiently obtained by a three- or four-component domino Knoevenagel / hetero-Diels–Alder reaction of aldehyde, Meldrum's acid, and enol ether in the presence or absence of alcohol, followed by reductive cleavage of the amine protecting
稠合的杂环吲哚并喹啉酮系统是包括喜树碱在内的几种高生物活性生物碱的关键结构特征。喜树碱已通过在有或没有酒精的情况下,由醛,梅德鲁姆酸和烯醇醚进行三或四组分的多米诺骨牌Knoevenagel /杂Diels-Alder反应,然后还原性裂解胺保护基团而有效地获得。沿着几种不同的途径将所得产物进一步转化为喜树碱。