DMAP‐Catalyzed [3+3] Annulation of Cyclopropenones with α‐Bromoketones for Synthesis of 2‐Pyrones
作者:Lijuan Qiao、Xin He、Lulu Yang、Kaki Raveendra Babu、Yong Wu、Yuhai Tang、Silong Xu
DOI:10.1002/ejoc.202200243
日期:2022.4.21
The DMAP-catalyzed [3+3] annulation of cyclopropenones with α-bromoketones was developed for a convenient synthesis of 2-pyrones. The mechanism may proceed in a pyridium ylide-initiated ring opening of cyclopropenones, followed by elimination of DMAP catalyst, and final 6π-electrocyclization.
为了方便合成 2-
吡喃酮,开发了
DMAP 催化的
环丙烯酮与 α-
溴酮的 [3+3] 环化。该机理可能在
吡啶内鎓引发的
环丙烯酮开环中进行,然后消除
DMAP催化剂,最后进行6π-电环化。