Results 41 to 50 of about 2,558 (239)
Methanolysis of Benzoyl hydrazines in the presence of Trifluoromethanesulfonic acid
, 2023 Methanolysis of variously substituted benzoyl hydrazines in the presence of CF3SO3H was explored for the first time. The effects of CF3SO3H acid concentration and substituents attached to benzoyl hydrazine on yield and reaction times were also examined.
Ul Haq, Intasar
core
Advanced Science, EarlyView.ABSTRACT The human body functions as a natural reactor for a vast network of chemical and biological reactions and physical interactions among small molecules, proteins, cells, and numerous other components. These reactions/interactions are essential for maintaining normal physiological functions.
Yuhao Cai, Chao Zhao
wiley +1 more source
Pyridine C─N Transposition via Cycloaddition–Cycloreversion
Angewandte Chemie, EarlyView.Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley +2 more sources
Reactivity of 4-tert-Butyldimethylsiloxy-1,2,3,6-tetrahydropyridines with Hydrazines
Molecules, 2006 The reactivity of 6-(nitrophenyl or trimethoxyphenyl)-4-tert-butyldimethyl- siloxy-1,2,3,6-tetrahydropyridine derivatives with hydrazines under acid conditions is described.
Manuel Medarde +4 more
doaj +1 more source
Quantum Mechanical and Molecular Mechanics (MM3) Studies of Hydrazines
, 2016 The structures, conformational energies, and vibrational frequencies of hydrazines have been studied at 6-31G** MP2 and 6-31G** B3LYP levels. Our theoretical structures generally agree with the available experimental data.
Jenn-Huei Lii (1824316) +3 more
core +1 more source
Advanced Science, EarlyView.A stable Ti3C2Clx/Ti3ZnC2 heterostructure, fabricated by dynamic etching, exhibits outstanding electrocatalytic NRR activity (NH3 yield: 20.1 µg h−1 mg−1, FE: 38.1%) in alkaline media. The corresponding Zn‐N2 battery achieves a peak power density of 36.5 µW cm−2 and an NH3 yield of 13.1 µg h−1 mg−1, providing an advanced strategy for NH3 and ...
Yu Wang +9 more
wiley +1 more source
Angewandte Chemie, EarlyView.The impact of C‐3 fluorination on the synthesis and conformation of alginate oligosaccharides is investigated. A C‐3‐fluoro mannuronic acid building block is generated and shown to react with high β‐selectivity. Automated glycan assembly enables access to uniquely fluorinated mannuronic acid alginates where deoxyfluorination is shown not to perturb the
Sean T. Evans +10 more
wiley +2 more sources
Synthesis of Mesoionic 1,3,4-Thiadiazole-2-Thiolates
MolbankA reliable synthesis of C5-unsubstituted 1,3,4-thiadiazole-2-thiolates is described that avoids potentially explosive or laborious steps. This work presents a reliable method for preparing the starting material dithioformate from carbon disulfide and ...
Sean Ray Kahnert, Andreas Schmidt
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2017 The reactions between o-hydroxylphenyl-functionalized enaminones and sulfonyl hydrazines providing 3-sulfenylated chromones via domino chromone ring construction and C(sp2)–H bond sulfenylation have been achieved under transition-metal-free conditions by
Yanhui Guo +3 more
doaj +1 more source
Rhodium-catalyzed enantioselectivedesymmetrizatio of bicyclic hydrazines with alkynilboronic esters
, 2008 The first successful asymmetric transfer of rhodium-alkynyl species to symmetrical strained alkenes has been realized starting from bicyclic hydrazines and alkynylboronic ...
PINESCHI, MAURO +7 more
core +1 more source