Synthesis of the novel crown and lariat ethers with integrated 1,2,3-triazole ring
作者:Jarosław Romański、Przemysław Jaworski
DOI:10.1080/10426507.2016.1255617
日期:2017.2.1
GRAPHICAL ABSTRACT ABSTRACT Crown ethers possessing an external chain are called lariatethers. Huisgen cycloaddition is the 1,3-dipolar cycloaddition occurs between a suitable azide and terminal alkyne to give a stable 1,2,3-triazole system. It is the most common reaction of the so called philosophy of “click chemistry,” introduced by Nobel prize laureate Sharpless.
Application of “Click” Cycloaddition for Synthesis of New Sulfur-Containing Oligomeric System
作者:Jarosław Romański、Monika Stefaniak
DOI:10.1080/10426507.2012.736106
日期:2013.4.1
The efficient synthesis of new sulfur-containing macrocycles via click-type alkyne-azide cycloaddition was described. Preliminarily, under aqueous conditions (water-methanol) using CuSO4/sodium ascorbate as a source of Cu(I), the yields of the products were very poor. Using the Cu(I) in nonaqueous solution (MeCN), the yields of the products grow significantly (approx. 50%).
‘Click' [3+2]-Cycloaddition Approach to Novel Cookson's Birdcage-Derived Thiacrown Ethers
Abstract The synthesis of novel Cookson’s birdcage-annulated thiacrowns as well as noncage oligomers with an incorporated 1,2,3-triazole moiety are described. The title compounds were prepared applying a click alkyne–azide cycloaddition reaction in the final macrocyclization step. Using this methodology a series of oligomers containing oxygen, nitrogen, and sulfur were prepared. The effective cycloaddition
Rhodium‐Catalyzed Asymmetric Macrocyclization towards Crown Ethers Using Hydroamination of Bis(allenes)
作者:Farhad Panahi、Bernhard Breit
DOI:10.1002/anie.202317981
日期:2024.4.2
The Rh-catalyzed hydroamination of bis(allenes) with diamines was found to be an efficient strategy to access chiral crown ethers starting from achiral substrates. This new strategy is characterized by high chemo-, enantio-and diastereoselectivity with a wide range of substrates and with good functional group tolerance to access a wide range of chiral macrocycles in high yields under mild conditions