Thiocarbamate‐Directed
<i>ortho</i>
C−H Bond Alkylation with Diazo Compounds
作者:Shengnan Jin、Zhan Chen、Yingwei Zhao
DOI:10.1002/adsc.201900804
日期:2019.10.22
We herein report a rhodium catalysed insertion of C(sp2)−H bond into diazo derived carbenes directed by a thiocarbamate group. This reaction provides a direct and efficient pathway to the ortho alkylation of phenol derivatives with a broad substrate scope. The C−H activation process is accomplished through a reversible electrophilic rhodation.
We herein establish a multicomponent annulation method for the synthesis of valuable iminocoumarins using aryl thiocarbamates, internal alkynes, and sulfonamides as starting materials, which are safe and readily available. The key step is a Rh-catalyzed and sulfur-directed C—H bondactivation. Preliminary mechanistic investigations suggested that the nucleophilic attack of the sulfonamide on an active
A thiosulfonate scaffold was applied to design selective and turn-on thiol probes for the first time.
一种硫代磺酸酯支架被应用于设计首次选择性和开启硫醇探针。
Synthesis and characterization of a novel fluorescent and colorimetric probe for the detection of mercury (II) even in the presence of relevant biothiols
作者:Olimpo García-Beltrán、Alejandra Rodríguez、Ariel Trujillo、Alvaro Cañete、Pabla Aguirre、Sebastián Gallego-Quintero、Marco T. Nuñez、Margarita E. Aliaga
DOI:10.1016/j.tetlet.2015.09.001
日期:2015.10
We present here a novel probe, coumarin 3-azomethine derivative (AGB), which can detect selectively mercuric ions (Hg2+) via a hydrolysis reaction promoted by these ions. Interestingly, the probe can be used to assess the response to Hg2+ even in the presence of the most important biothiols-glutathione and cysteine—and could be used in the Hg2+—imaging in living cells.