The manuscript describes a novel and efficient oxidative bromination of olefins, alkynes, and ketones with HBr as the brominating reagent and DMSO as the mild oxidant. This chemistry provides an...
Rh(III)-Catalyzed Cyclopropanation Initiated by C–H Activation: Ligand Development Enables a Diastereoselective [2 + 1] Annulation of N-Enoxyphthalimides and Alkenes
作者:Tiffany Piou、Tomislav Rovis
DOI:10.1021/ja506579t
日期:2014.8.13
N-Enoxyphthalimides undergo a Rh(III)-catalyzedC–Hactivationinitiatedcyclopropanation of electron deficient alkenes. The reaction is proposed to proceed via a directed activation of the olefinic C–H bond followed by two migratory insertions, first across the electron-deficient alkene and then by cyclization back onto the enol moiety. A newly designed isopropylcyclopentadienyl ligand drastically
One-Pot Strategy for Thiazoline Synthesis from Alkenes and Thioamides
作者:Nur-E Alom、Fan Wu、Wei Li
DOI:10.1021/acs.orglett.7b00079
日期:2017.2.17
convenient synthesis of a privileged pharmaceutical motif, thiazoline is accomplished. This reaction utilizes simple and readily available alkene and thioamide substrates in an intermolecular fashion via a simple one-pot procedure. A wide range of functional groups is tolerated, and the thiazoline product has been further utilized for the synthesis of the corresponding β-aminothiol and thiazole from routine
Visible‐Light‐Mediated Synthesis of 1‐Oxa‐4‐aza‐spiro Oxazolines by Spiroannulation of Quinones with Vinyl Azides
作者:Subhankar Sarkar、Aramita De、Sougata Santra、Igor A. Khalymbadzha、Grigory V. Zyryanov、Adinath Majee
DOI:10.1002/ejoc.202200503
日期:2022.7.14
A new, simple and efficient method has been developed to synthesize 1-oxa-4-aza-spirooxazolines. The reaction was carried out at room temperature using rose bengal as an organic photoredox catalyst and blue LED as a light source. It was observed that quinones underwent spiroannulation reaction with vinyl azide on C-O double bond instead of C-C double bond through which various corresponding various
开发了一种新的、简单有效的合成1-oxa-4-aza-spirooxazolines的方法。该反应在室温下使用玫瑰红作为有机光氧化还原催化剂和蓝色 LED 作为光源进行。据观察,醌与叠氮乙烯在 CO 双键而不是 CC 双键上发生螺环化反应,通过该反应,各种相应的各种相应的 1-oxa-4-aza-spirooxazolines 以良好至优异的产率合成。