Anionic Cascade Reaction Followed by Silylative Dieckmann Cyclization: A Straightforward Route to Tricyclic Fused Ring Systems Starting from Alkynyl Esters Tethered to Bicyclo[n.2.0]alkanones
作者:Vincent Rietsch、Laurence Miesch、Daisuke Yamashita、Michel Miesch
DOI:10.1002/ejoc.201000986
日期:2010.12
The successive addition of sodium ethoxide and TBSOTf (or TMSOTf) to alkynyl esters tethered to bicyclo[n.2.0]alk-anones (n = 3-5) promoted a domino anionic reaction and a Dieckmann condensation, respectively, which led to 5-6-5, 6-6-5, and 7-6-5 tricyclic fused ring systems. These systems represent relevant substructures of numerous bioactive compounds.
将乙醇钠和 TBSOTf(或 TMSOTf)连续添加到与双环 [n.2.0] 烷酮(n = 3-5)相连的炔基酯中,分别促进了多米诺阴离子反应和 Dieckmann 缩合,导致 5- 6-5、6-6-5 和 7-6-5 三环稠环系统。这些系统代表了许多生物活性化合物的相关子结构。