Comparative study on the reactivity of propargyl and alkynyl sulfides in palladium-catalyzed domino reactions
作者:Thomas Castanheiro、Angèle Schoenfelder、Jean Suffert、Morgan Donnard、Mihaela Gulea
DOI:10.1016/j.crci.2016.12.007
日期:2017.6
propargyl or an alkynyl moiety have been studied in cyclocarbopalladation/cross-coupling domino palladium-catalyzed sequences. The reactivity of different types of sulfured starting materials has been compared as well as the difference in behavior of these compounds depending on the type of cross coupling ending the domino sequence. It appeared that these cascades were constantly more efficient on the propargyl
摘要 在环碳钯化/交叉偶联多米诺钯催化序列中研究了三种类型的带有炔丙基或炔基部分的硫化物。已经比较了不同类型硫化起始材料的反应性以及这些化合物的行为差异,这取决于结束多米诺序列的交叉偶联类型。似乎这些级联对炔丙基苄基硫醚总是更有效。此外,已经证明以 Stille、Suzuki-Miyaura 或 Mizoroki-Heck 结尾的多米诺骨牌序列可以有效且选择性地生成所需的环化产物。值得注意的是,当在级联末端引入炔烃时,看来,Sonogashira 偶联每次都会在混合物中产生所需的环状产物,该产物是由底物的芳基部分和用作伙伴的炔烃之间的直接偶联产生的。用 Stille 偶联代替 Sonogashira 来完成多米诺骨牌序列可以显着提高混合物的比例,有利于所需的环化化合物。