Copper(II) SBA-15: A reusable catalyst for azide–alkyne cycloaddition
摘要:
The azide-alkyne cycloaddition reaction was investigated under catalytic conditions involving a copper(II) loaded silica based mesoporous material. Cu(II) SBA-15 demonstrated a high catalytic effect in 1,4-triazoles synthesis in organic. No additives such as a base or a reductant are required. Quantitative yields were obtained and a mere filtration of the mesoporous material which retains copper(II) allows the recovery of the catalyst. In addition, up to 5 times recycling of the catalyst was achieved without loss of the activity affording 1,4-triazoles in a yield up to 98%. (C) 2014 Elsevier B.V. All rights reserved.
Small Molecule Microarray Based Discovery of PARP14 Inhibitors
作者:Bo Peng、Ann-Gerd Thorsell、Tobias Karlberg、Herwig Schüler、Shao Q. Yao
DOI:10.1002/anie.201609655
日期:2017.1.2
cellular processes. Most small‐molecule PARP inhibitors developed to date have been against PARP1, and suffer from poor selectivity. PARP14 has recently emerged as a potential therapeutic target, but its inhibitor development has trailed behind. Herein, we describe a smallmolecule microarray‐based strategy for high‐throughput synthesis, screening of >1000 potential bidentate inhibitors of PARPs, and the
nitrogen nucleophilic substituents, readily undergoes intramolecular nucleophilic displacement to afford azido-substituted heterocyclic compounds. This intramolecular substitution occurs with inversion of configuration at the carbon atom bearing the selenium atom. Starting from acetamido selenides and carbamato selenides, a stereocontrolled synthesis of the vicinal amino alcohol precursor oxazolines and
作者:Linghui Qian、Chong-Jing Zhang、Ji'en Wu、Shao Q. Yao
DOI:10.1002/chem.201603150
日期:2017.1.5
Challenges exist in the development of potent and selective small‐molecule inhibitors against caspase‐1. Herein, by making use of the copper‐free strain‐promoted alkyne–azide cycloaddition (SPAAC) reaction between difluorinated cyclooctynes (DIFOs) and various azide‐containing compounds, we showed for the first time that potential caspase‐1 inhibitors could be rapidly synthesized. The resulting fused
Rh-Catalyzed Coupling Reactions of Fluoroalkyl <i>N</i>-Sulfonylhydrazones with Azides Leading to α-Trifluoroethylated Imines
作者:Zhongxue Fang、Yanmei Gong、Binbin Liu、Jin Zhang、Xinyue Han、Zhaohong Liu、Yongquan Ning
DOI:10.1021/acs.orglett.2c03773
日期:2022.12.9
Herein we describe the pioneering Rh-catalyzed coupling reactions of a fluoroalkyl carbene with azides to access α-trifluoroethylated imines, where fluoroalkyl N-sulfonylhydrazones are used as fluoroalkyl diazo surrogates. Remarkably, using TMSN3 as the N source, two C–N bond formation products were obtained. Furthermore, the α-trifluoroethylated imine products could be easily reduced to the corresponding