Results 101 to 110 of about 23,538 (226)

Coupling Reactions of α-Bromocarboxylate with Non-Aromatic N-Heterocycles

Molecules, 2009
The conditions for the C-N bond forming reaction (C-N coupling reaction) between α-bromocarboxylate and nitrogen-containing non-aromatic heterocyclic rings under heterogeneous copper(I) oxide catalysis are investigated in this paper.
Jozef Csollei, Ivan Raich, Josef Jampilek, Lukas Placek, Barbora Slaba, Katerina Brychtova   +5 more
doaj   +1 more source

Direct catalytic photodecarboxylative amination of carboxylic acids with diazirines: Divergent access to amines, hydrazines, and nitrogen-containing heterocycles

Amines, hydrazines, and nitrogen-containing heterocycles are pivotal species in medicine, agriculture, fine chemicals, and materials. Diazirines have been recently reported to serve as versatile electrophilic amination reagents for the synthesis of ...
Justin, Lopchuk, Paresh, Athawale, Preeti, Chandrachud, Vishala, Maharaj   +3 more
core   +1 more source

SYNTHESIZED AND GEOMETRY OPTIMIZATION OF DIFFERENT SUBSTITUTED NITROGEN AND SULPHUR CONTAINING HETEROCYCLES

, 2018
<p>A series of some novel 2-(5-methyl-1, 3, 4-thiadiazole-2-yl)-1H-Benzimidazole and 2-(1H-benzimidazol-2-yl)-1,3-benzothiazole derivatives were designed and synthesized under microwave irradiation via multistep reaction.
Ajay M. Chaturvedi & Vikas Vijayvargiya
core   +1 more source

Synthesis and anticancer activity of podophyllotoxin derivatives with nitrogen-containing heterocycles. [PDF]

Front Chem, 2023
Yin M, Fang Y, Sun X, Xue M, Zhang C, Zhu Z, Meng Y, Kong L, Myint YY, Li Y, Zhao J, Yang X.   +11 more
europepmc   +1 more source

Catalytic Enantioselective Intramolecular Aza‐Michael Addition to α,β‐Unsaturated Esters

Angewandte Chemie, EarlyView.
A general method for accessing enantioenriched saturated N‐heterocycles via a catalytic enantioselective intramolecular aza‐Michael reaction to α,β‐unsaturated esters is described. A superbasic bifunctional iminophosphorane (BIMP) catalyst was key to enabling reactivity of the high pKa sulfonamide pronucleophile, whilst delivering good to excellent ...
Evan G. W. Rutter, Cameron J. MacRae, Haoran Xiong, Daniel Rozsar, Katherine F. P. Clarke, Darren J. Dixon   +5 more
wiley   +2 more sources

Access to nitrogen-nitrogen bond-containing heterocycles through substrate promiscuity of piperazate synthases [PDF]

The nitrogen-nitrogen (N-N) bond motif comprises an important class of compounds for drug discovery. Synthetic methods are primarily based on the modification of N-N or N=N precursors, whereas selective methods for direct N-N coupling offer advantages in
de Kok, Niels A.W.; id_orcid, Schröder, Simon; id_orcid, Tischler, Dirk, Maier, Artur, Li, Yongxin; id_orcid, Fodran, Peter; id_orcid, Schmidt, Sandy; id_orcid, Osipyan, Angelina, van Merkerk, Ronald, Founti, Maria   +9 more
core   +1 more source

The Intramolecular Povarov Tool in the Construction of Fused Nitrogen-Containing Heterocycles. [PDF]

Top Curr Chem (Cham), 2023
Masdeu C, de Los Santos JM, Palacios F, Alonso C.   +3 more
europepmc   +1 more source

Isolation of a Highly Reactive CBNC Heterocumulene via Azidoborylene Photolysis: Facile Access to a Crystalline Dioxaborirane

Angewandte Chemie, EarlyView.
Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King, Vignesh Pattathil, William Kennedy, Robert K. Szilagyi, Conor Pranckevicius   +4 more
wiley   +2 more sources

Enantioselective additions of copper acetylides to cyclic iminium and oxocarbenium ions

Beilstein Journal of Organic Chemistry, 2015
The development of enantioselective, copper-catalyzed alkynylations of cyclic iminium and oxocarbenium ions is reviewed. The use of chiral copper-based catalysts has enabled high yields and enantioselectivites in the formation of nitrogen- and oxygen ...
Jixin Liu, Srimoyee Dasgupta, Mary P. Watson   +2 more
doaj   +1 more source

Single‐Atom Iron‐Catalyzed Oxidative Esterification: From Methylarenes to the Upcycling of Polystyrene and Lignin‐Derived Feedstocks

Angewandte Chemie, EarlyView.
Heterogeneous iron‐catalyzed environmentally benign and sustainable CH‐oxidative esterification methodology has been developed for the synthesis of esters. This challenging reaction has been achieved by the rational design of specific single atom iron‐based catalyst with Fe‐N4 active centers, which empowered the oxidative esterification of methyl and ...
Zhuang Ma, Binyu Zhang, Hui Yang, Yue Hu, Junzheng Yu, Yanbin Cui, Jun Zhao, Matthias Beller, Rajenahally V. Jagadeesh   +8 more
wiley   +2 more sources