作者:Ewa Jabłonka-Gronowska、Bartłomiej Witkowski、Paweł Horeglad、Tomasz Gierczak、Karol Grela
DOI:10.1016/j.crci.2013.01.017
日期:2013.6
Résumé Compounds 12-15, possessing two styrenes connected by a silicon linker [1,1,3,3 tetramethyl-di-siloxane], were synthesized, characterized and used as model compounds for the ring-closing metathesis (RCM) catalyzed by commercially available ruthenium catalysts 1, 2 and 3. The RCM reactions of 12 and 15 in the presence of catalysts 1 or 2 resulted exclusively in the formation of (E)-stilbenes. The RCM reactions of 13 and 14, compounds possessing alkoxide substituents in the ortho position to styrene functionality, were not observed in the presence of 2, presumably due to the formation of inactive Hoveyda type ruthenium complexes. The RCM of mixture of 12 and 15, with 2, was used for the detailed examination of the mechanism of metathesis reactions investigated in this work. They revealed that both inter- and intramolecular metathesis is possible, in this case, despite the use of siloxane linker. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.pdf
摘要翻译:
化合物12-15含有通过硅连接基(1,1,3,3-四甲基二硅氧烷)连接的两个苯乙烯,这些化合物被合成、表征,并作为商业可得的钌催化剂1、2和3催化的环闭合复分解反应(RCM)的模型化合物。12和15在催化剂1或2存在下的RCM反应专一地生成(E)-二苯乙烯。13和14这两个在苯乙烯官能团邻位具有烷氧基取代基的化合物,在2存在下未观察到RCM反应,这可能是由于形成了无活性的Hoveyda型钌配合物。使用2催化12和15的混合物进行RCM反应,用于详细研究本工作中考察的复分解反应机理。研究表明,尽管使用了硅氧烷连接基,在这种情况下分子间和分子内复分解反应都是可能的。
补充材料:
本文的补充材料以单独文件提供:
mmc1.pdf