An Organodiselenide with Dual Mimic Function of Sulfhydryl Oxidases and Glutathione Peroxidases: Aerial Oxidation of Organothiols to Organodisulfides
作者:Vandana Rathore、Aditya Upadhyay、Sangit Kumar
DOI:10.1021/acs.orglett.8b02756
日期:2018.10.5
peroxidase (GPx) enzymes for oxidation of thiols by oxygen and hydrogenperoxide, respectively, into disulfides has been presented. The developed catalyst oxidizes an array of organothiols into respective disulfides in practical yields by using aerial O2 to avoid any reagents/additives, base, and light source. The synthesized diselenide also catalyzes the reduction of hydrogenperoxide into water by following
Problem to be Solved
It is intended to provide an industrially preferable fluoroalkylating agent and use thereof.
Solution
The present invention provides a fluoroalkylating agent represented by the general formula (1) wherein R
1
is a C1 to C8 fluoroalkyl group; R
2
and R
3
are each independently a C1 to C12 alkyl group or the like; Y
1
to Y
4
are each independently a hydrogen atom, a halogen atom, or the like; and X
−
is a monovalent anion.
A compound of the general formula (3): R
4
—S—R
1
having an introduced C1 to C8 fluoroalkyl group is easily obtained by reacting a compound of the general formula (2): R
4
—S—Z wherein R
4
is a hydrocarbon group or the like; and Z is a leaving group, with the compound of the general formula (1).
Regioselective transition metal- and halogen-free direct dithiolation at C(sp<sup>3</sup>)–H of nitrotoluenes with diaryl disulfides
作者:Shailesh Kumar、Rahul Kadu、Sangit Kumar
DOI:10.1039/c6ob01856d
日期:——
tert-butoxide-mediated regioselective direct C–S bond formation at the C(sp3)–H position of nitrotoluenes with disulfides in DMSO at room temperature. The developed reaction generated, in good yields, various dithioacetals having OMe, halogen, and NH2 functionalities at various positions of the arene rings of the disulfides. Interestingly, in the absence of nitrotoluene, diaryldisulfides and diselenides underwent one-carbon
The sulfenylation and sulfonylation of (sp2)C–H bonds of benzamides were achieved with the aid of a bidentate directing group.
苯甲酰胺的(sp²)C-H键的磺化和磺酰化在双齿导向基的辅助下实现。
Visible-light-induced metal and reagent-free oxidative coupling of <i>sp</i><sup>2</sup> C–H bonds with organo-dichalcogenides: synthesis of 3-organochalcogenyl indoles
作者:Vandana Rathore、Sangit Kumar
DOI:10.1039/c9gc00007k
日期:——
and halo either on indoles or aryl dichalcogenides showed amenability to the developed reaction. Furthermore, thiocyanation of the sp2 C–H bonds of indoles has been accomplished by this visible light induced method. A mechanistic understanding by UV-visible, EPR spectroscopy, and cyclic voltammetry suggests that light induces electron transferfrom the electron rich arene to oxygen providing an arene