Results 111 to 120 of about 922,646 (221)

Synthesis of Large‐ and Medium‐Sized Heterobiaryl Atropisomeric Rings and Atropopeptides by Catalytic Intramolecular SNAr

Angewandte Chemie, EarlyView.
Catalytic, intramolecular N‐heterocycle arylation by nucleophilic aromatic substitution (SNAr) is now available for synthesis of highly strained macrocycles and medium‐sized heterobiaryl atropisomeric rings, including atropopeptides. Key to the approach is the ability to generate a strong base catalytically, taking advantage of base‐embedding ...
Alireza Abbasi Kejani, Paritosh Dey, Nicholas H. Stillman, Daniel M. Andrade, Michal Šimek, Martin Dračínský, Daniel Bím, Paulo H. S. Paioti   +7 more
wiley   +2 more sources

Investigating the preparation of oxime derivatives of azacrown ethers containing piperidine-4-one heterocycles under microwave irradiation

Vietnam Journal of Science, Technology and Engineering
The use of multi-component reactions to simultaneously synthesise crown ethers and nitrogen-containing heterocycles is a synthetic approach that has attracted significant interest. With nitrogen heterocycles embedded in their structures, azacrown ethers
Tung H. To, Hieu D. Nguyen
doaj   +1 more source

Microbial conversions of nitrogenous heterocycles

, 2015
The monography describes examples of the application of microbial technologies for obtaining of derivatives from a series of nitrogen heterocycles (saturated nitrogen heterocycles, azaarenes and quinolones). It is proposed alternative ways for synthesize
Igor A Parshikov
core   +1 more source

Influence of Substitution on the Interplay of Photochemical Switching and Phase Transitions in Azobenzene‐Based Molecular Materials

Angewandte Chemie, EarlyView.
This study investigates the influence of several substituents at different positions on photochemical and thermal properties of azobenzene‐based materials to provide valuable structure‐property relationships for the specific design of azobenzene‐based materials for future energy storage and phase change materials. ABSTRACT Understanding and translating
Conrad Averdunk, Hermann A. Wegner
wiley   +2 more sources

Radiation-driven Destruction of N-heterocycles in the Presence and Absence of Water Ice

The Astrophysical Journal
Simple N -heterocycles are expected to be an abundant class of molecules within the interstellar medium, and increasingly complex heterocycles (e.g., nucleobases) have been detected within meteoritic organic material and in samples returned from the ...
Patrick D. Tribbett, Yukiko Y. Yarnall, Perry A. Gerakines, Reggie L. Hudson, Christopher K. Materese   +4 more
doaj   +1 more source

Prospects for the use of growth stimulators based on nitrogen-containing heterocycles in plant propagation technologies

Біологічні системи: теорія та інновації
Nitrogen-containing heterocycles have attracted the attention of researchers as compounds widely represented in the structures of both natural and synthetic plant growth regulators.
M. Zavhorodnii, V. Gencheva, V. Shupeniuk, O. Brazhko, V. Horban   +4 more
doaj   +1 more source

PHOTOCHEMICAL AND THERMAL REACTIONS OF DIAZOALKANES WITH SIX-MEMBERED NITROGEN HETEROCYCLES AND LITHIUM ALUMINOHYDRIDE REDUCTIONS OF MALEAMIC ACIDS.

, 1963
PHOTOCHEMICAL AND THERMAL REACTIONS OF DIAZOALKANES WITH SIX-MEMBERED NITROGEN HETEROCYCLES AND LITHIUM ALUMINOHYDRIDE REDUCTIONS OF MALEAMIC ...
ORESTE LEROY. SALERNI (7954547)
core   +2 more sources

Formal pyridine meta-azidation and its application for the synthesis of diazepines, ring-fused δ-carbolines and 1,2,3-triazolylpyridines

Nature Communications
The nitrogen atom serves as an important structural element in pharmacologic studies, highlighting the critical role of nitrogen-containing heterocycles in drug discovery.
Shu-Min Guo, Pengwei Xu, Constantin G. Daniliuc, Armido Studer   +3 more
doaj   +1 more source

Diastereoselective Alkylation of Activated Nitrogen Heterocycles with Alkenyl Boronate Complexes. [PDF]

Angew Chem Int Ed Engl, 2023
McGettigan JE, Ready JM.
europepmc   +1 more source

Alcohols as Alkylating Agents in the Cation-Induced Formation of Nitrogen Heterocycles. [PDF]

Angew Chem Int Ed Engl, 2022
Cox L, Zhu Y, Smith PJ, Christensen KE, Sidera Portela M, Donohoe TJ.   +5 more
europepmc   +1 more source