Silver-Catalyzed Preparation of Oxazolines from <i>N</i>-Propargylamides
作者:Michael Harmata、Chaofeng Huang
DOI:10.1055/s-2008-1078405
日期:2008.5
Treatment of N-propargylamides with 5 mol% of silver hexafluoroantimonate results in the rapid formation of oxazolines in essentially quantitative yield.
用 5 mol% 六氟锑酸银处理 N-炔丙基酰胺导致恶唑啉快速形成,收率基本上是定量的。
Utilization of Copper-Catalyzed Carboarylation–Ring Closure for the Synthesis of New Oxazoline Derivatives
A copper-catalyzed carboarylation–ring-closure strategy was used for the modular synthesis of oxazolines via the reaction of 1-aryl- and 1-alkylpropargylamides and diaryliodonium salts. The novel approach enables the efficient, modular synthesis of oxazolinederivatives bearing fully substituted exo double bonds.
Enantioselective Catalytic Cyclopropanation–Rearrangement Approach to Chiral Spiroketals
作者:Kuioyng Dong、Raj Gurung、Xinfang Xu、Michael P. Doyle
DOI:10.1021/acs.orglett.1c01113
日期:2021.5.21
A highly enantioselective synthesis of chiral heterobicyclic spiroketals is reported via a “one-pot” cyclopropanation–rearrangement (CP-RA) cascade reaction that is sequentially catalyzed by a chiral Rh(II) catalyst and tetrabutylammonium fluoride (TBAF). Exocyclic vinyl substrates form spirocyclopropanes with tert-butyldimethylsilyl-protected enoldiazoacetates in excellent yields and with excellent