Ruthenium-catalyzed oxidation of alkynes to 1,2-diketones under room temperature and one-pot synthesis of quinoxalines
作者:Yuan Xu、Xiaobing Wan
DOI:10.1016/j.tetlet.2012.11.142
日期:2013.2
A ruthenium-catalyzedalkyne oxidation to 1,2-diketones using Oxone under room temperature is reported. Both substrate scope and mechanism were discussed. Notably, combination of the alkyne oxidation and condensation cyclization in one pot offers a very efficient and convenient entry into quinoxaline derivatives.
Ruthenium-Catalyzed Alkyne Oxidation with Part-Per-Million Catalyst Loadings
作者:Wei Ren、Jinfeng Liu、Long Chen、Xiaobing Wan
DOI:10.1002/adsc.201000250
日期:——
dimer, [Ru(cymene)Cl2]2, (0.001 mol%) and iodine (10 mol%), a variety of alkynes bearing different functional groups were oxidized with tert‐butyl hydroperoxide (TBHP; 70% solution in water) under mild conditions to give 1,2‐diketones in good to excellent yields. Two noteworthy features of the method are the extremely high catalyst productivity (TON up to 420,000) and scale‐up to 1 mol. Preliminary mechanism
Vapor-Phase Detection of Trinitrotoluene by AIEE-Active Hetero-oligophenylene-Based Carbazole Derivatives
作者:Manoj Kumar、Varun Vij、Vandana Bhalla
DOI:10.1021/la302309z
日期:2012.8.21
New AIEE-active hetero-oligophenylene carbazole derivatives 3 and 4 have been synthesized and serve as fluorescent probes for the selectivedetection of 2,4,6-trinitrotoluene (TNT) in the vapor phase, the solid phase, and aqueous media. In addition, paper strips prepared by dip-coating a solution of aggregates of derivatives 3 and 4 can provide a simple, portable, sensitive, selective, low-cost method
Fluorescent supramolecular metal assemblies as ‘no quenching’ probes for detection of threonine in the nanomolar range
作者:Sharanjeet Kaur、Vandana Bhalla、Manoj Kumar
DOI:10.1039/c4cc03877k
日期:——
A highly sensitive detection of threonine is realized using a supramolecular ensemble of aggregates of hetero-oligophenylene derivative 3 and Zn2+ ions. On the basis of fluorogenic response of aggregates of 3 toward Zn2+ ions and threonine, we have constructed a 2-input, 3-output sequential logic circuit at the molecular level.