Efficient Synthesis of Six-Membered Ring D Analogues of the Pentacyclic Alkaloid Cephalotaxine by Two Palladium-Catalyzed Reactions
作者:Lutz F. Tietze、Hartmut Schirok、Michael Wöhrmann、Klaus Schrader
DOI:10.1002/1099-0690(200007)2000:13<2433::aid-ejoc2433>3.0.co;2-g
日期:2000.7
D-homo-Cephalotaxine analogues 19 and 23 have been prepared by intramolecular Heck reactions of 12 and 22. The substrates 12 and 22 were obtained by alkylation and acylation, respectively, of the spirocyclic amines 17, which, in turn, were generated by intramolecular palladium-catalyzed allylic amination.
D-高-头孢噻吩类似物 19 和 23 已通过 12 和 22 的分子内 Heck 反应制备。底物 12 和 22 分别通过烷基化和酰化螺环胺 17 获得,而螺环胺 17 又通过分子内生成钯催化的烯丙基胺化。