Palladium-Catalyzed Carbo-Aminative Cyclization of 1,6-Enynes: Access to Napthyridinone Derivatives
作者:Undamatla Suri Babu、Maneesh Kumar Reddy Singam、Muniganti Naveen Kumar、Jagadeesh Babu Nanubolu、Maddi Sridhar Reddy
DOI:10.1021/acs.orglett.2c00088
日期:2022.3.4
We describe herein a general approach to napthyridinones via the Pd-catalyzed annulation of 1,6-enynes with 2-iodoanilines. This protocol represents a rare carbo-aminative annulative cyclization via the 6-endo-trig mode, subduing the well-documented exo-trig/dig cyclizations. The regioselective aryl palladation of alkyne followed by Heck-type intramolecular coupling before isomerization were key in
1,6-Enynes 最近引起了极大的关注,为独特的级联环化铺平了道路,提供了来自线性底物的复杂环状基序。我们在此描述了通过 Pd 催化的 1,6-烯炔与 2-碘苯胺的环化来制备萘啶酮的一般方法。该协议通过 6-endo-trig 模式代表了一种罕见的碳胺环化环化,抑制了有据可查的 exo-trig/dig 环化。炔烃的区域选择性芳基钯化,然后是异构化之前的 Heck 型分子内偶联是实现这种级联的关键。