Tailored Palladium Catalysts for Selective Synthesis of Conjugated Enynes by Monocarbonylation of 1,3‐Diynes
作者:Jiawang Liu、Ji Yang、Carolin Schneider、Robert Franke、Ralf Jackstell、Matthias Beller
DOI:10.1002/anie.201915386
日期:2020.6.2
1'-binaphthalene (Neolephos), which permits the palladium-catalyzed selective carbonylation under mild conditions, providing a general preparation of functionalized 1,3-enynes in good-to-high yields with excellent chemoselectivities. Synthetic applications that showcase the possibilities of this novel methodology include an efficient one-pot synthesis of 4-aryl-4H-pyrans as well as the rapid construction of various
首次实现了容易获得的 1,3-二炔的单烷氧基羰基化以产生合成有用的共轭烯炔。成功的关键是设计和利用新配体 2,2'-双(叔丁基(吡啶-2-基)膦基)-1,1'-联萘 (Neolephos),它允许钯催化选择性羰基化在温和条件下,以良好到高的产率提供官能化 1,3-烯炔的通用制备,并具有优异的化学选择性。展示这种新方法可能性的合成应用包括 4-芳基-4H-吡喃的高效一锅法合成以及各种杂环、双环和多环化合物的快速构建。