Results 111 to 120 of about 53,373 (308)
Catalytic C–H Allylation and Benzylation of Pyrazoles
, 2016 We describe a general approach for the synthesis of allylated and benzylated pyrazoles. An electron-withdrawing substituent, such as nitro, chloro, and ester groups, at C4 renders the Lewis basic nitrogen atom to be less basic and the C–H bond more ...
Ha-Lim Jang (1695910) +3 more
core +1 more source
The continuing significance of chiral agrochemicals
Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley +1 more source
A Versatile Heterometallic Microporous MOF for Photocatalytic Hydrogen Generation
Small, EarlyView.This work describes a green and scalable approach to robust and flexible heterometallic MOFs, MIP‐215's, with tunable photoactivity for efficient, noble‐metal‐free solar hydrogen production. ABSTRACT Photocatalytic particulate systems offer a cost‐effective solar hydrogen production but are generally limited by narrow visiblelight absorption and poor ...
Xingze Wang +10 more
wiley +1 more source
, 2003 A convenient one-pot procedure for the preparation of pyrazoles by 1,3-dipolar cycloaddition of diazo compounds generated in situ has been developed. Diazo compounds derived from aldehydes were reacted with terminal alkynes to furnish regioselectively 3 ...
Aggarwal, VK +2 more
core +1 more source
, 2016 A convenient one-pot procedure for the preparation of pyrazoles by 1,3-dipolar cycloaddition of diazo compounds generated in situ has been developed. Diazo compounds derived from aldehydes were reacted with terminal alkynes to furnish regioselectively 3 ...
Javier de Vicente (1534099) +2 more
core +1 more source
Advances in Unconventional and Sustainable Synthetic Approaches to Benzopyran Scaffolds
The Chemical Record, EarlyView.This review provides a comprehensive and critical analysis of low‐impact synthetic methodologies reported in the last 8 years (2018–2026) for the construction of benzopyran‐derived scaffolds, such as coumarins, flavones, chromones, chromenes, and chromanes. The benzopyran scaffold is a versatile family of heterocycles found in a wide range of bioactive
Nathalia B. Sá +4 more
wiley +1 more source
Brain Pathology, EarlyView.Divergent remodeling of TRPC channels occurs in Alzheimer's disease, with TRPC3 increased in neurons and reactive astrocytes and TRPC6 reduced in pyramidal neurons. These alterations may contribute to calcium dysregulation, neuroinflammation, and synaptic dysfunction during AD progression.
Xingyong Chen +8 more
wiley +1 more source
Studies Toward the Reactivity of Hydrazones for the Synthesis of Functionalized Pyrazoles and Nitromethyl Sulfones and the Application of Pyrazoles Thereof [PDF]
, 2016 Supervisor: Tharmalingam PunniyamurthyThe thesis contains four chapters. The first chapter focuses on synthesis of bisarylnitromethyl sulfones via iron-mediated radical nitration of bisarylsulfonylhydrazones followed by elimination of N2.
Sar, Dinabandhu
core +1 more source
Тонкие химические технологии, 2009 Synthesis of 1-(β-naphthyl)-3-ferrocenyl pyrazole-4-carbaldehyde was carried out from acetylferrocene and naphthalen-2-ylhydrazine followed by intramolecular cyclization under Vilsmeier-Haack conditions.
E. Yu. Osipova +4 more
doaj
One-pot synthesis of 4-(phenylselanyl)-substituted pyrazoles
, 2016 A facile, one-pot, general synthetic method for the preparation of 4-(phenylselanyl)pyrazoles is described. When reacted with hydrazines, α,β-alkynic aldehydes produced in situ α,β-alkynic hydrazones, which, upon treatment with phenylselenyl chloride ...
Metin Zora +3 more
semanticscholar +1 more source