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.
Economical, Green, and Safe Route Towards Substituted Lactones by Anodic Generation of Oxycarbonyl Radicals
作者:Alessia Petti、Matthew C. Leech、Anthony D. Garcia、Iain C. A. Goodall、Adrian P. Dobbs、Kevin Lam
DOI:10.1002/anie.201909922
日期:2019.11.4
A new electrochemical methodology has been developed for the generation of oxycarbonyl radicals under mild and green conditions from readily available hemioxalate salts. Mono- and multi-functionalised γ-butyrolactones were synthesised through exo-cyclisation of these oxycarbonyl radicals with an alkene, followed by the sp3 -sp3 capture of the newly formed carbon-centred radical. The synthesis of functionalised
Sequenced Reactions with Samarium(II) Iodide. Tandem Nucleophilic Acyl Substitution/Ketyl−Olefin Coupling Reactions
作者:Gary A. Molander、Christina R. Harris
DOI:10.1021/ja952619k
日期:1996.1.1
Samarium(II) iodide has been employed to promote a tandemintramolecular nucleophilic acyl substitution/intramolecular ketyl−olefin coupling cyclization sequence, generating bicyclic, tricyclic, and spirocyclic ring systems in excellent yield and with high diastereoselectivity. This versatile reaction sequence allows entry to several different naturally occurring tricyclic systems containing the angular
碘化钐 (II) 已被用于促进串联分子内亲核酰基取代/分子内羰基-烯烃偶联环化序列,以优异的产率和高非对映选择性生成双环、三环和螺环系统。这种通用的反应序列允许进入包含角形和线性三喹烷骨架的几种不同的天然三环系统。