Palladium-Catalyzed Cyclization/Heck- and Cyclization/Conjugate-Addition-Type Sequences in the Preparation of Polysubstituted Furans
作者:José M. Aurrecoechea、Aritz Durana、Elena Pérez
DOI:10.1021/jo800211q
日期:2008.5.1
from the elements of the butatrienyl carbinol while the electron-deficient olefin is incorporated as a C-3 substituent. In most cases, the reaction proceeds via a Heck-type pathway leading to the efficient formation of 3-vinylfurans. However, couplings with methyl vinyl ketone display a divergent behavior to afford selectively either Heck- or hydroarylation-type products depending on reaction conditions
钯催化的杂环偶联序列已从丁1,2,3-三烯基甲醇和缺电子的烯烃开始发展。形成多取代的呋喃,其中杂环起源于丁三烯甲醇的元素,而缺电子烯烃作为C-3取代基引入。在大多数情况下,反应是通过Heck型途径进行的,导致有效地形成了3-乙烯基呋喃。然而,与甲基乙烯基酮偶联显示出不同的行为,以根据反应条件选择性地提供Heck-或氢芳基化型产物。