Access to 1H-indazoles, 1H-benzoindazoles and 1H-azaindazoles from (het)aryl azides: a one-pot Staudinger-aza-Wittig reaction leading to N–N bond formation?
Tripod-Tripod Coupling of Triazides with Triphosphanes. The Synthesis, Characterization, and Stability in Solution of New Cage Compounds: Chiral Macrobicyclic Triphosphazides
The self-assembly of tris(3-azidobenzyl)amines with 1,1,1-tris[(diphenylphosphino)methyl]ethane via tripod–tripod coupling proceeds successfully to give chiral macrobicyclic triphosphazides. The heating of these macrobicyclic cages induces a remarkable stepwise triple extrusion of molecularnitrogen to afford tri-λ5-phosphazenes, which preserved the chiral, propeller-like topology of their precursors
1,5-(H, RO, RS) shift/6π-electrocyclic ring closure tandem processes on N-[(α-heterosubstituted)-2-tolyl]ketenimines: a case study of relative migratory aptitudes and activating effects
A number of N-aryl ketenimines, substituted at the ortho position either with different non-cyclic acetalic functions (acetals, monothioacetals, dithioacetals) or with only one alkoxymethyl or (alkylthio)methyl group, have been prepared and submitted to thermal treatment in toluene solution. Under smooth heating the ketenimines bearing non-cyclic acetals converted into 3,4-dihydroquinolines following
Activity-Based Approach for Selective Molecular CO<sub>2</sub> Sensing
作者:Ori Green、Patrick Finkelstein、Miguel A. Rivero-Crespo、Marius D. R. Lutz、Michael K. Bogdos、Michael Burger、Jean-Christophe Leroux、Bill Morandi
DOI:10.1021/jacs.2c02361
日期:2022.5.18
selective fluorescent carbon dioxidemolecular sensors (CarboSen) that addresses these existing challenges through an activity-based approach. Besides the design, synthesis, and evaluation of these small molecules as CO2 sensors, we demonstrate their utility by tailoring their reactivity and optical properties, allowing their use in a broad spectrum of multidisciplinary applications, including atmospheric
二氧化碳 (CO 2 ) 影响生活的方方面面,并且已经建立了许多传感技术来检测和监测这种无处不在的分子。然而,尽管这种方法在理解这种分子在复杂环境中的作用方面具有巨大潜力,但其在分子水平上的选择性传感仍然是一个尚未解决的挑战。在这项工作中,我们介绍了一类独特的选择性荧光二氧化碳分子传感器 (CarboSen),它通过基于活动的方法解决了这些现有挑战。除了这些小分子作为 CO 2的设计、合成和评估传感器,我们通过调整它们的反应性和光学特性来展示它们的实用性,允许它们在广泛的多学科应用中使用,包括大气传感、化学反应监测、酶学和活细胞成像。总的来说,这些结果展示了 CarboSen 传感器作为广泛适用的工具来监测和可视化跨多个学科的二氧化碳的潜力。
Acid-Promoted Cyclization of α-Azidobenzyl Ketones through C═N Bond Formation: Synthesis of 6-Substituted Quinoline Derivatives
ketones has been developed for the synthesis of 6-substituted quinoline derivatives. A variety of synthetically useful 6-OTf or -OMs quinoline derivatives were obtained in moderate to good yields. The reaction proceeds via C═N bond formation without organophosphine, providing convenient access to structurally interesting and synthetically important 6-substituted quinoline derivatives in moderate to good