Diastereoselective Trapping of Transient Carboxylic Oxonium Ylides with α,β‐Unsaturated 2‐Acyl Imidazoles
作者:Mengchu Zhang、Tianyuan Zhang、Dan Zhang、Wenhao Hu
DOI:10.1002/adsc.202000701
日期:2020.11.4
By developing a diastereoselective reaction of cyclopropene carboxylic acids with α,β‐unsaturated 2‐acylimidazoles, we reported here a Michael‐type trapping of transient carboxylic oxonium ylides. This transformation provides a direct approach for the construction of valuable γ‐butenolide derivatives in good yields (60–99%) with high diastereoselectivities (up to >95:5 dr) under mild reaction conditions
A General Synthetic Strategy toward the Truxillate Natural Products via Solid-State Photocycloadditions
作者:Ellie F. Plachinski、Hyung Joo Kim、Matthew J. Genzink、Kyana M. Sanders、Riley M. Kelch、Ilia A. Guzei、Tehshik P. Yoon
DOI:10.1021/jacs.4c04706
日期:2024.6.5
has limited the use of photocycloaddition methodology toward the synthesis of this important class of naturalproducts. Herein, we demonstrate that acid-controlled precipitation of C-acyl imidazoles promotes a highly selective solid-state photocycloaddition, and the products of this reaction can be quickly transformed into truxillate naturalproducts.