Transition-metal-free persulfuration to construct unsymmetrical disulfides and mechanistic study of the sulfur redox process

2015 ◽  
Vol 51 (20) ◽  
pp. 4208-4211 ◽  
Author(s):  
Xiao Xiao ◽  
Minghao Feng ◽  
Xuefeng Jiang
Keyword(s):  
Natural Products ◽  
Transition Metal ◽  
Redox Process ◽  
Biologically Active ◽  
New Method ◽  
Mechanistic Study ◽  
Metal Free ◽  
Active Moiety

A sulfur redox process has been developed between sulfinate and thiosulfate, which efficiently affords diverse unsymmetrical disulfides and provides a new method to modify pharmaceuticals and natural products with this biologically active moiety without extra oxidant or reductant.

scholarly journals Mechanistic Study on the Reaction of pinB-BMes2 with Alkynes Based on Experimental Investigation and DFT Calculations: Gradual Change of Mechanism Depending on the Substituent

2021 ◽  
Author(s):  
Linlin Wu ◽  
Chiemi Kojima ◽  
Ka Ho Lee ◽  
Shogo Morisako ◽  
Zhenyang Lin ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Transition Metal ◽  
Dft Calculations ◽  
Kinetic Analysis ◽  
Reaction Rate ◽  
Mechanistic Study ◽  
Isomer Ratio ◽  
Gradual Change ◽  
Isomeric Mixture ◽  
Metal Free

Transition-metal free direct and base-catalyzed 1,2-diborations of arylacetylenes using pinB-BMes2 provided syn/anti-isomeric mixture of diborylalkenes. The kinetic analysis showed that the reaction rate and isomer ratio were affected by reaction...

Direct and metal-free oxidative amination of sp3 C–H bonds for the construction of 2-hetarylquinazolin-4(3H)-ones

2016 ◽  
Vol 3 (9) ◽  
pp. 1096-1099 ◽  
Author(s):  
Huanhuan Liu ◽  
Tianran Zhai ◽  
Shiteng Ding ◽  
Yalei Hou ◽  
Xiangyu Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
New Method ◽  
Oxidative Amination ◽  
Metal Free ◽  
Mild Conditions

New method for synthesis of 2-hetarylquinazolin-4(3H)-ones from 2-aminobenzamides and (2-azaaryl)methanes under transition-metal free conditions, featuring a wide substrate scope with a broad range of functional group tolerance under mild conditions.

Transition-metal-free polycyclic indoline formation via a free radical pathway: a computational mechanistic study

2020 ◽  
Vol 139 (3) ◽  
Author(s):  
Chenguang Luo ◽  
Lin Lu ◽  
Lin Zhang ◽  
Zuoyin Yang ◽  
Min Pu ◽  
...  
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Mechanistic Study ◽  
Metal Free

scholarly journals Chemistry and Biological Activities of 1,2,4-Triazolethiones—Antiviral and Anti-Infective Drugs

Molecules ◽  
2020 ◽  
Vol 25 (13) ◽  
pp. 3036
Author(s):  
Ashraf A. Aly ◽  
Alaa A. Hassan ◽  
Maysa M. Makhlouf ◽  
Stefan Bräse
Keyword(s):  
Natural Products ◽  
Heterocyclic Compounds ◽  
Biological Activities ◽  
Biologically Active ◽  
Biological Applications ◽  
Active Moiety ◽  
Interesting Class

Mercapto-substituted 1,2,4-triazoles are very interesting compounds as they play an important role in chemopreventive and chemotherapeutic effects on cancer. In recent decades, literature has been enriched with sulfur- and nitrogen-containing heterocycles which are used as a basic nucleus of different heterocyclic compounds with various biological applications in medicine and also occupy a huge part of natural products. Therefore, we shed, herein, more light on the synthesis of this interesting class and its application as a biologically active moiety. They might also be suitable as antiviral and anti-infective drugs.

Recent Advances in the Transition Metal Catalyzed Addition of Carboxylic Acids to Alkynes

2021 ◽  
Vol 25 ◽  
Author(s):  
Victorio Cadierno
Keyword(s):  
Natural Products ◽  
Transition Metal ◽  
Carboxylic Acids ◽  
Heterocyclic Compounds ◽  
Biologically Active ◽  
Recent Advances ◽  
Enol Esters ◽  
Cascade Processes ◽  
Transition Metal Catalyzed ◽  
Metal Catalyzed

: Recent advances in the metal-catalyzed hydrofunctionalization of alkynes with carboxylic acids are comprehensively reviewed. Both inter- and intramolecular processes, leading respectively to enol esters and lactones, are discussed, as well as the involvement of these transformations in the synthesis of natural products and biologically active molecules, and the assembly of elaborated heterocyclic compounds though cascade processes. Literature published since 2011 is covered.

Transition-metal free direct difluoromethylthiolation of electron-rich aromatics with difluoromethanesulfonyl chloride

2017 ◽  
Vol 4 (2) ◽  
pp. 232-235 ◽  
Author(s):  
Xia Zhao ◽  
Aoqi Wei ◽  
Tianjiao Li ◽  
Zhiyang Su ◽  
Jun Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
New Method ◽  
Metal Free

A new method for phosphine-mediated difluoromethylthiolation of indoles and other electron-rich aromatics using difluoromethanesulfonyl chloride was developed.

ChemInform Abstract: Transition-Metal-Free Oxidative Amidation of Benzyl Alcohols with Amines Catalyzed by NaI: A New Method for the Synthesis of Benzamides.

ChemInform ◽  
2015 ◽  
Vol 46 (10) ◽  
pp. no-no
Author(s):  
Meghdad Karimi ◽  
Dariush Saberi ◽  
Kobra Azizi ◽  
Marzban Arefi ◽  
Akbar Heydari
Keyword(s):  
Transition Metal ◽  
New Method ◽  
Benzyl Alcohols ◽  
Metal Free ◽  
Oxidative Amidation

An Easy Access to Sulfur Derivatives of 6,8-Dioxabicyclo[3.2.1]octanes, Naturally Abundant Scaffolds

Synthesis ◽  
2018 ◽  
Vol 50 (13) ◽  
pp. 2624-2630 ◽  
Author(s):  
Elena Schmidt ◽  
Ivan Bidusenko ◽  
Igor Ushakov ◽  
Nadezhda Protsuk ◽  
Boris Trofimov
Keyword(s):  
Natural Products ◽  
Free Radical ◽  
Transition Metal ◽  
Uv Irradiation ◽  
Radical Reaction ◽  
Easy Access ◽  
Free Radical Reaction ◽  
One Pot ◽  
Metal Free ◽  
Derivatives Of

Sulfur derivatives of 6,8-dioxabicyclo[3.2.1]octanes related to a number of natural products have been synthesized by the click hydrothiolation (AIBN or UV irradiation) of 7-methylene-6,8-dioxabicy­clo[3.2.1]octanes, assembled from acetylene and ketones in a one-pot transition-metal-free synthetic operation. An unusual feature of this free-radical reaction is that it is accelerated in the presence of bases due to involvement of the latter in a competition between the thiol addition and proton-catalyzed isomerization of the starting bicyclooctanes.

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