π-Conjugated Triazenes: Intermediates That Undergo Oxidation and Substitution Reactions
作者:Enrique Barragan、Alejandro Bugarin
DOI:10.1021/acs.joc.6b02705
日期:2017.2.3
triazenes is herein reported. This observed and unprecedented triazene reactivity gave access to oxidation and substitution reactions. These transformations include successful synthesis of aldehydes, ketones, ethers, and sulfides from readily available organic azides via π-conjugated triazene intermediates. Notably, the afforded adducts were obtained in good yields, at room temperature, and in the absence
Palladium-catalyzed cross-coupling reaction of azides with isocyanides
作者:Zhen Zhang、Zongyang Li、Bin Fu、Zhenhua Zhang
DOI:10.1039/c5cc05981j
日期:——
A palladium-catalyzed cross-coupling reaction of azides with isocyanides is developed, providing a general synthetic route to unsymmetric carbodiimides.
Interrupted CuAAC‐Thiolation for the Construction of 1,2,3‐Triazole‐Fused Eight‐Membered Heterocycles from
<i>O</i>
‐/
<i>N</i>
‐Propargyl derived Benzyl Thiosulfonates with Organic Azides
click-sulfenylation of O-/N-propargyl benzyl thiosulfonates with organic azides has been disclosed. The unified CuAAC-thiolation provides a wide range of triazole-fused eight-membered heterocycles in good to high (51–94%) yields under mild reaction conditions. Moreover, a three-component reaction is also achieved involving O-/N-propargyl benzyl thiosulfonates, benzyl bromide, and sodium azide to deliver fused-triazoles
A New Multicomponent Multicatalyst Reaction (MC)<sup>2</sup>R: Chemoselective Cycloaddition and Latent Catalyst Activation for the Synthesis of Fully Substituted 1,2,3-Triazoles
A multicomponent multicatalyst reaction (MC)2R for constructing fully substituted1,2,3-triazoles is reported. An application of chemoselectivity and latent catalysis in a sequence of multicatalytic reactions confers control over a number of undesired processes, where all of the reagents coexist in the same reaction vessel. The sequence of a chemoselective copper-catalyzed azide alkyne cycloaddition
Trapping of Azidocarbenium Ion: A Unique Route for Azide Synthesis
作者:Suman Pramanik、Prasanta Ghorai
DOI:10.1021/ol5008235
日期:2014.4.18
the first time, a sensitive azidocarbenium ionintermediate has been trapped with various nucleophiles to provide azides in excellent chemoselectivity. This provides a novel approach for the chemoselective synthesis of primary and secondary benzyl azides from aldehydes in a one-pot reaction. Enantioselective nucleophilic addition to the azidocarbenium ion has also been initiated.