Efficient Synthesis of Polysubstituted Furans through a Base‐Promoted Oxacyclization of (
<i>Z</i>
)‐2‐En‐4‐yn‐1‐ols
作者:Asma Hrizi、Emilie Thiery、Moufida Romdhani‐Younes、Johan Jacquemin、Jérôme Thibonnet
DOI:10.1002/ejoc.202100471
日期:2021.7.22
AbstractAn efficient base catalyzed oxacyclization of Z‐enynols has been developed under transition metal‐free reaction conditions, thus resulting in a variety of new di‐, tri‐, and tetra‐substituted furans. This approach allowed us to obtain 32 new compounds. Furthermore, DFT calculations were realized to depict a relationship between the natural population analysis and experimental results with alkyl or aryl groups for the synthesis of 2‐benzylfuran. A one‐pot Sonogashira/oxacyclization approach offers a flexible, robust and efficient alternative to base catalyzed cyclization is also carried out.