Results 61 to 70 of about 30,672 (247)

Gold-Catalyzed Hydrothiolation of Alkenes and Allenes with Thiols

Chemistry
The reaction mechanism of the gold-catalyzed hydrothiolation of alkenes (1) with thiols (2) has been investigated in detail. The tetranuclear gold complex, (PPh3)4Au4(SPh)2(NTf)2 (A), is a key intermediate in the catalytic hydrothiolation of alkenes.
Akiya Ogawa, Taichi Tamai, Keiko Fujiwara, Ryo Tanaka, Daichi Kurata, Yuki Yamamoto   +5 more
doaj   +1 more source

Recent developments in copper-catalyzed radical alkylations of electron-rich π-systems

Beilstein Journal of Organic Chemistry, 2015
Recently, a number of papers have emerged demonstrating copper-catalyzed alkylation reactions of electron-rich small molecules. The processes are generally thought to be related to long established atom-transfer radical reactions.
Kirk W. Shimkin, Donald A. Watson
doaj   +1 more source

Electrochemically Driven Regioselective Radical Functionalization of Allenes: Scope and Mechanistic Insights

Advanced Science, EarlyView.
Allenes emerge as powerful platforms for electrochemical functionalization through radical pathways. Selective radical addition at the central carbon triggers anodic oxidation and intramolecular cyclization, enabling efficient synthesis of oxazolines and oxazolidine‐2‐imines without external oxidants.
Pranjal Pyne, Prateek Saini, Rohel Hoque, Shivam Pandey, Srinivasan Ramakrishnan, Chandra M. R. Volla   +5 more
wiley   +1 more source

1,1′-(2,2-Diphenylethene-1,1-diyl)bis(3,5-dimethyl-1H-pyrazol-2-ium) dichloride

IUCrData
The title compound, C24H26N42+·2Cl−, crystallizes in the triclinic space group P1. The ethene derivative is substituted by two phenyl groups in 2-position and two 3,5-dimethylpyrazolinium units in 1-position, which makes this alkene into a dication.
Anke Schwarzer, Uwe Böhme
doaj   +1 more source

Immobilization of MoO2(acac)2 on Multiwall Carbon Nano Tube and Epoxidation of Alkenes [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2019
The acidic group (-CO2H) of MultiWall Carbon Nanotube (MWCNT) converted to acyl chloride group (-COCl) producing of MVCNT@COCl. Then the reaction of MVCNT@COCl and MoO2(acac)2 resulted in direct immobilization of the MoO2(acac)2 and the formation of ...
Mahdieh Nafar, Gholamhossein Grivani
doaj  

Nickel‐Catalyzed Three‐Component Difluoroalkylation‐Amination for the Direct Access to Anti‐Inflammatory β‐Difluoroalkyl Amines

Advanced Science, EarlyView.
A nickel‐catalyzed three‐component reductive fluoroalkylation‐amination strategy of N‐vinylamides for the direct access to the α‐amidyl‐β‐difluoroalkyl amines was reported here. The synthetic method features with broad substrate scope, mild conditions, high functional group tolerance, and convenience to handle.
Chang Xu, Fangting Ma, Fan Ding, Luyan Wang, Yunxi Li, Yunzhi He, Xingang Zhang, Siyu He, Dandan Liu   +8 more
wiley   +1 more source

NiH‐Catalyzed Enantio‐ and Regioselective Hydroselenylation of Unactivated Alkenes

Advanced Science, EarlyView.
Nickel‐hydride‐catalyzed enantio‐ and regioselective hydroselenylation of unactivated alkenes provides access to chiral organoselenium compounds. Enantiodetermining Ni–H insertion followed by single‐electron diselenide activation generates selenyl radical.
Hyung‐Joon Kang, Jaehun Kim, Sungwoo Hong   +2 more
wiley   +1 more source

N,N- and N,O-Bidentate-Chelation-Assisted Alkenyl C–H Functionalization

Molecules
Chelation-assisted olefinic C–H functionalization has been demonstrated to be a powerful method of constructing multi-substituted alkenes from simpler ones.
Yawei Zhang, Chengxing Peng, Xiaoli Li, Xiuying Liu, Liyuan Ding, Guofu Zhong, Jian Zhang   +6 more
doaj   +1 more source

New developments in gold-catalyzed manipulation of inactivated alkenes

Beilstein Journal of Organic Chemistry, 2013
Over the recent years, the nucleophilic manipulation of inactivated carbon–carbon double bonds has gained remarkable credit in the chemical community.
Michel Chiarucci, Marco Bandini
doaj   +1 more source

Enantioselective Access to Trifluoromethylated Spirocyclopropyl Heterocycles

Advanced Science, EarlyView.
We report a rhodium‐catalyzed asymmetric [2+1] spirocyclopropanation of methylene azacycles with trifluoromethyl carbenes in situ derived from fluoroalkyl triftosylhydrazones. ABSTRACT Chiral spirocyclopropyl heterocycles have emerged as privileged three‐dimensional structural motifs in medicinal chemistry.
Yuanhao Zhu, Youzhi Xu, Weitao Zhang, Yongyue Ning, Yaojia Jiang, Yongquan Ning, Genping Huang, Jiawei Cheng, Paramasivam Sivaguru, Xihe Bi   +9 more
wiley   +1 more source