Iron-mediated Markovnikov-selective hydro-trifluoromethylthiolation of unactivated alkenes

2015 ◽  
Vol 51 (25) ◽  
pp. 5479-5481 ◽  
Author(s):  
Tao Yang ◽  
Long Lu ◽  
Qilong Shen
Keyword(s):  
Mild Conditions ◽  
First Time

An iron-mediated hydro-trifluoromethylthiolation of unactivated olefins under mild conditions was described for the first time.

Copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62298-62301 ◽  
Author(s):  
Xiaoli Yu ◽  
Qiujin Wu ◽  
Huida Wan ◽  
Zhaojun Xu ◽  
Xingle Xu ◽  
...  
Keyword(s):  
Mild Conditions ◽  
First Time

The copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides has been developed under mild conditions with moderate to good yields. This is the first time to prepare arylthioquinones with arylsulfonyl chlorides.

Ni-catalyzed direct iminoalkynylation of unactivated olefins with terminal alkynes: facile access to alkyne-labelled pyrrolines

2021 ◽  
Author(s):  
Xingjie Zhang ◽  
Di Qi ◽  
Chenchen Jiao ◽  
Zhiguo Zhang ◽  
Xiaopan Liu ◽  
...  
Keyword(s):  
Radical Cyclization ◽  
Terminal Alkynes ◽  
Mild Conditions ◽  
Type Coupling ◽  
First Time

The direct iminoalkynylation of unactivated olefins with terminal alkynes is achieved for the first time by nickel-catalyzed cascade iminyl-radical cyclization/Sonogashira-type coupling of γ,δ-unsaturated oxime esters under mild conditions. This transformation...

Nitroacenaphthene as a New Photocatalyst for the Synthesis of Sulfonyl Amidines

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4425-4433
Author(s):  
Yong Jian ◽  
Ming Chen ◽  
Chao Yang ◽  
Wujiong Xia
Keyword(s):  
Visible Light ◽  
Small Molecule ◽  
Reaction Pathways ◽  
Visible Light Photocatalyst ◽  
Mild Conditions ◽  
Sulfonyl Azides ◽  
Site Selective ◽  
First Time

A small molecule, namely nitroacenaphthene, is reported for the first time as a recyclable visible-light photocatalyst for the construction of the C=N bond from sulfonyl azides and amines. This scalable, site-selective protocol provides a convenient way to access various sulfonyl amidines under mild conditions. Two reaction pathways are proposed, according to different transformation patterns.

Ce3+ self-doped CeOx/FeOCl: an efficient Fenton catalyst for phenol degradation under mild conditions

2019 ◽  
Vol 48 (10) ◽  
pp. 3476-3485 ◽  
Author(s):  
Jian Zhang ◽  
Mengxue Yang ◽  
Ye Lian ◽  
Mingliang Zhong ◽  
Jingquan Sha ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Phenol Degradation ◽  
Natural Light ◽  
Neutral Solution ◽  
Mild Conditions ◽  
Fenton Catalyst ◽  
First Time

Herein, a novel Ce3+ self-doped CeOx/FeOCl composite was successfully prepared by a facile method for the first time, which showed remarkable catalytic activity as a Fenton catalyst in the degradation of phenol under the conditions of a neutral solution, room temperature and natural light.

Neodymium-Promoted Highly Selective Carbon–Carbon Double Bond Formation of Ketones with Allyl Halides in the Presence of Diethyl Phosphite

Synthesis ◽  
2020 ◽  
Vol 52 (22) ◽  
pp. 3446-3451
Author(s):  
Songlin Zhang ◽  
Dengbing Xie ◽  
Yiqiong Wang ◽  
Bo Yang
Keyword(s):  
Double Bond ◽  
Bond Formation ◽  
Point Of View ◽  
Diethyl Phosphite ◽  
Reaction Conditions ◽  
One Pot ◽  
Mild Conditions ◽  
Carbon Double Bond ◽  
Allyl Halides ◽  
First Time

The carbon–carbon double bond formation via neodymium-mediated Barbier-type reaction of ketones and allyl halides in the presence of diethyl phosphite is reported for the first time. The reaction is highly α-regioselective and was conveniently carried out under mild conditions in a one-pot fashion. From a synthetic point of view, a series of conjugated alkenes were obtained in moderate to good yields in this one-pot reaction with feasible reaction conditions.

Sterically-controlled intermolecular Friedel–Crafts acylation with twisted amides via selective N–C cleavage under mild conditions

2016 ◽  
Vol 52 (41) ◽  
pp. 6841-6844 ◽  
Author(s):  
Yongmei Liu ◽  
Guangrong Meng ◽  
Ruzhang Liu ◽  
Michal Szostak
Keyword(s):  
Bond Cleavage ◽  
Mild Conditions ◽  
First Time

Highly chemoselective Friedel–Crafts acylation of arenes with twisted amides by N–C bond cleavage is reported for the first time.

scholarly journals A Versatile New Reagent for Nitrosation under Mild Conditions

2021 ◽  
Author(s):  
Jordan D. Galloway ◽  
Cristian Sarabia ◽  
James C. Fettinger ◽  
Hrant Hratchian ◽  
Ryan Baxter
Keyword(s):  
Room Temperature ◽  
Computational Analysis ◽  
Functional Group ◽  
Nitroso Compounds ◽  
Chemical Reagent ◽  
Experimental Conditions ◽  
X Ray ◽  
Mild Conditions ◽  
Rotational Isomers ◽  
First Time

We report a new chemical reagent for transnitrosation under mild experimental conditions. This new reagent is stable to air and moisture across a broad range of temperatures, and is effective for transnitrosation in multiple solvents. Compared to traditional nitrosation methods, our reagent shows high functional group tolerance for substrates that are susceptible to oxidation or reversible transnitrosation. Several challenging nitroso-compounds are accessed here for the first time, including 15N isotopologues. X-ray data confirms two rotational isomers of the reagent are configurationally stable at room temperature, although only one isomer is effective for transnitrosation. Computational analysis describes the energetics of rotamer interconversion, including interesting geometry-dependent hybridization ef-fects.

scholarly journals Efficient and Reusable Iron Catalyst to Convert CO2 into Valuable Cyclic Carbonates

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1089
Author(s):  
Ana P. C. Ribeiro ◽  
Peter Goodrich ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Catalytic Effect ◽  
Iron Catalyst ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Mild Conditions ◽  
First Time

The production of cyclic carbonates from CO2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz = 1H-pyrazol-1-yl) as a catalyst, is achieved in excellent yields (up to 98%) in a tailor-made ionic liquid (IL) medium under mild conditions (80 °C; 1–8 bar). A favorable synergistic catalytic effect was found in the [FeCl2{κ3-HC(pz)3}]/IL system. Notably, in addition to exhibiting remarkable activity, the catalyst is stable during ten consecutive cycles, the first decrease (11%) on the cyclic carbonate yield being observed during the 11th cycle. The use of C-scorpionate complexes in ionic liquids to afford cyclic carbonates is presented herein for the first time.

scholarly journals Development of a Simple Removable Aliphatic Template for Remote Meta-Selective C−H Functionalization: Experimental and Computational Studies

2020 ◽  
Author(s):  
Perla Ramesh ◽  
Chinnabattigalla Sreenivasulu ◽  
Koteswara Rao Gorantla ◽  
Bhabani Mallik ◽  
Gedu Satyanarayana
Keyword(s):  
Column Chromatography ◽  
Future Development ◽  
Practical Approach ◽  
Computational Studies ◽  
Mild Conditions ◽  
The Future ◽  
Olefin Coupling ◽  
Site Selective ◽  
First Time

Herein, we have successfully unveiled a simple and inexpensive removable aliphatic template as an effective DG template in promoting remote <i>meta</i>-C−H olefination of arenes for the first time. Remarkably, the template was achieved in excellent yields in just two steps and without column chromatography purification. The protocol is an efficient, economical and practical approach in achieving <i>meta</i>-C−H olefination in good to excellent isolated yields and high levels of <i>meta</i>-selectivity under mild conditions. A wide variety of substituted arenes and olefin coupling partners are well tolerated in this reaction. Moreover, the aliphatic template is found to be advantageous due to its easy synthesis, easy installation/removal, and recycle. We believe that this strategy offers new opportunities for the future development of new DG templates to promote site-selective C−H functionalizations.

Defective Pt nanoparticles encapsulated in mesoporous metal–organic frameworks for enhanced catalysis

2018 ◽  
Vol 54 (64) ◽  
pp. 8822-8825 ◽  
Author(s):  
Qiang Wang ◽  
Xu-Sheng Wang ◽  
Chun-Hui Chen ◽  
Xue Yang ◽  
Yuan-Biao Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Metal Organic Frameworks ◽  
Pt Nanoparticles ◽  
Mild Conditions ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time

Highly ultrafine defective Pt nanoparticles (NPs) encapsulated in the mesopores of MIL-101 (Pt(Co)@MIL-101) were achieved for the first time through a chemical dealloying approach. The obtained material could provide more active sites to contact reactants and showed superior catalytic activity towards the hydrogenation of nitroarenes under mild conditions.

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