Synthesis of (Z) isomers of benzoheterocyclic derivatives of combretastatin A-4: a comparative study of several methods
作者:Thi Thanh Binh Nguyen、Thierry Lomberget、Ngoc Chau Tran、Roland Barret
DOI:10.1016/j.tet.2013.01.005
日期:2013.3
monobromoalkene, a combination of hydrosilylation/vinylsilane hydrolysis and a palladium-catalyzed semi-hydrogenation step, using DMF/KOH as the hydrogen source. Our studies led us to prepare a series of diarylacetylene derivatives via a Sonogashira coupling reaction, and also to find out a copper-free basic cyclization leading to benzo[b]thiophenes. The final choice for the synthesis method of 1 strongly depends
研究了几种制备(Z)三甲氧基苯乙烯衍生物1的方法。在发现Wittig反应导致不满意的结果后,考虑了三种不同的策略:使用DMF / KOH作为氢源的Suzuki偶联与立体定义的单溴烯烃,氢化硅烷化/乙烯基硅烷水解和钯催化的半氢化步骤的组合。我们的研究使我们通过Sonogashira偶联反应制备了一系列二芳基乙炔衍生物,并且发现了无铜的碱性环化反应,从而生成了苯并[ b ]噻吩。1的合成方法的最终选择 强烈依赖于目标化合物,但通常应优先选择避免使用有毒锡还原剂的半氢化反应。