science. Methods for the incorporation of lightly fluorinated groups such as CF2H have been less well developed. Here we report the use of difluorinated diazoacetone as a practical reagent for the directsynthesis of CF2H-substituted 2-amidofurans through addition to ynamides. These newly designed difluorinated amidofurans were elaborated to create new nitrogen-containing frameworks that would be challenging
含有二氟甲基的分子的重要性是由它们在制药和农业化学科学中的潜在应用驱动的。掺入轻度氟化基团(例如CF 2 H)的方法还没有得到很好的发展。在这里,我们报告了使用二氟化重氮丙酮作为一种实用试剂,通过添加到ynamides直接合成CF 2 H 取代的2-酰氨基呋喃。这些新设计的二氟酰氨基呋喃经过精心设计,以创造新的含氮框架,否则很难获得。
Regio- and Stereoselective Addition to <i>gem</i>-Difluorinated Ene–Ynamides: Access to Stereodefined Fluorinated Dienes
作者:Maxime Hourtoule、Laurence Miesch
DOI:10.1021/acs.orglett.2c01593
日期:2022.6.3
their dual functional groups, offer a unique entry to difluorinated dienes and to stereodefined, monofluoro-substituted dienes. Stereoselectiveaddition to the ynamide moiety led to difluorinated dienes. A stereocontrolled domino δ elimination reaction followed by an addition/elimination sequence from trifluoromethylated N-allenamides provided exclusively stereodefined monofluorinated ene–ynamides.
From A<sup>3</sup>/KA<sup>2</sup> to AYA/KYA multicomponent coupling reactions with terminal ynamides as alkyne surrogates – a direct, green route to γ-amino-ynamides
A copper-catalysed three-component coupling reaction between a carbonyl derivative, a terminal ynamide and an amine has been developed for the one-pot construction of γ-amino-ynamides under mild and environmentally-friendly conditions.
Highly Substituted 2-Amido-furans From Rh(II)-Catalyzed Cyclopropenations of Ynamides
作者:Hongyan Li、Richard P. Hsung
DOI:10.1021/ol901860b
日期:2009.10.1
Rh(II)-catalyzed cyclopropenations of ynamides are described. Although an actual amido-cyclopropene intermediate may not be involved, these reactions provide a facile entry to highly substituted 2-amido-turans, thereby formerly constituting a [3 + 2] cycloaddition. An application of these de novo 2-amido-turans in N-tethered intramolecular [4 + 2] cycloadditions is also illustrated, leading to dihydroindoles and tetrahydroquinolines.
Synthesis of Non-natural Aza-Iridoids <i>via</i> Ynamides and Molecular Networking-Based Tracing of Their <i>In Planta</i> Bioconversion