Relay ring-closing metathesis strategies towards the synthesis of the ABC tricycle of Taxol
作者:Andrea Ojeda-Porras、Rémi Aouzal、Claire Wilson、Joëlle Prunet
DOI:10.1016/j.tet.2022.132630
日期:2022.1
tricycle of Taxol are presented. They both involve a relay ring-closing metathesis reaction to make the central B ring in a convergent fashion. In the first approach, the extender arm is positioned on the A ring, and the C ring bears the relay tether in the second route. Metathesis precursors with diverse extender arms were efficiently synthesised; unfortunately, the crucial metathesis reactions failed
介绍了两种合成紫杉醇 ABC 三轮车的路线。它们都涉及中继闭环复分解反应,以使中央 B 环以收敛的方式。在第一种方法中,延长臂位于 A 环上,而 C 环在第二种路线中承载中继系绳。高效合成了具有多种扩展臂的复分解前体;不幸的是,关键的复分解反应在所有情况下都未能提供目标化合物。