Streamlined Strategy for Scalable and Enantioselective Total Syntheses of the Eburnane Alkaloids
作者:Gujjula V. Ramakrishna、Larisa P. Pop、Zurwa Latif、Harish K. V. Suryadevara、Luca Santo、Filippo Romiti
DOI:10.1021/jacs.3c07019
日期:2023.9.13
concise, and efficient strategy for the enantioselective synthesis of the eburnane alkaloid family of natural products is disclosed. Specifically, 13 members of the natural product family were prepared from commercially available and inexpensive starting materials. The brevity and modularity of the route are largely on account of a two-phase synthesis logic and a key catalytic enantioconvergent cross-coupling
Sequenced Reactions with Samarium(II) Iodide. Tandem Intramolecular Nucleophilic Acyl Substitution/Intramolecular Barbier Cyclizations
作者:Gary A. Molander、Christina R. Harris
DOI:10.1021/ja00118a007
日期:1995.4
Samarium(II) iodide has been employed to promote a tandem intramolecular nucleophilic acyl substitution/intramolecular Barbier cyclization sequence, generating bicyclic and tricyclic ring systems in excellent yield and high diastereoselectivity. Additionally, a highly versatile ring expansion-cyclization sequence allows entry into several different naturally occurring tricyclic ring systems containing seven- and eight-membered rings.