Results 301 to 310 of about 50,011 (341)

Photoredox Decarboxylative C(sp3)-N Coupling of α-Diazoacetates with Alkyl N-Hydroxyphthalimide Esters for Diversified Synthesis of Functionalized N-Alkyl Hydrazones.

Organic Letters, 2019
Herein we report a metal-free photocatalytic coupling reaction for the synthesis of structurally and functionally diverse N-alkyl hydrazones from α-diazoacetates and N-alkyl hydroxyphthalimide esters.
Chun-Ming Chan, Q. Xing, Y. Chow, Sing-Fung Hung, Wing-Yiu Yu   +4 more
semanticscholar   +1 more source

Copper(I)-Catalyzed Oxyamination of β,γ-Unsaturated Hydrazones: Synthesis of Dihydropyrazoles.

Organic Letters, 2019
An efficient aerobic copper(I)-catalyzed oxyamination of β,γ-unsaturated hydrazones has been developed. The methodology provides effective access to dihydropyrazole derivatives in a one-pot process utilizing dioxygen as a sustainable sacrificial oxidant.
Shan-Jia Chen, Wenming Chen, Xu Chen, Guifang Chen, L. Ackermann, X. Tian   +5 more
semanticscholar   +1 more source

Gold-Catalyzed Highly Selective Photoredox C(sp(2) )-H Difluoroalkylation and Perfluoroalkylation of Hydrazones.

Angewandte Chemie, 2016
The first gold-catalyzed photoredox C(sp(2) )-H difluoroalkylation and perfluoroalkylation of hydrazones with readily available RF -Br reagents is reported. The resulting gem-difluoromethylated and perfluoroalkylated hydrazones are highly functionalized,
J. Xie, Tuo Zhang, Fei Chen, Nina Mehrkens, F. Rominger, M. Rudolph, A. Hashmi   +6 more
semanticscholar   +1 more source

Recent advances in apoptosis: The role of hydrazones.

Mini-Reviews in Medical Chemistry, 2019
The process of programmed cell death in higher eukaryotes (apoptosis), is generally characterized by distinct morphological characteristics and energy-dependent biochemical mechanisms.
P. Çıkla-Süzgün, Ş. Küçükgüzel
semanticscholar   +1 more source

Nickel-Catalyzed Regioselective Hydroalkylation of 1,3-Dienes with Hydrazones

, 2019
Hydroalkylation of unsaturated hydrocarbons with unstablized carbon nucleophiles is difficult and remains a major challenge. The disclosed examples so far mainly focused on the involvement of heteroatom and/or stabilized carbon nucleophiles as efficient ...
Leiyang Lv, Dianhu Zhu, Zihang Qiu, Jianbin Li, Chao‐Jun Li   +4 more
semanticscholar   +1 more source

Hydrazones

Chemistry of Heterocyclic Compounds, 1976
B. I. Buzykin, N. N. Bystrykh, A. P. Stolyarov, S. A. Flegontov, V. V. Zverev, Yu. P. Kitaev   +5 more
openaire   +2 more sources

Fluoroalkyl N-sulfonyl hydrazones: An efficient reagent for the synthesis of fluoroalkylated compounds

Science China Chemistry, 2021
Paramasivam Sivaguru, X. Bi
semanticscholar   +1 more source

Amide hydrazones from hydrazones and sulphonyl chloride–amide complexes

J. Chem. Soc. C, 1967
Hydrazones of 5-nitro-2-furaldehyde, 3,5-dibromosalicylaldehyde, and o-hydroxyacetophenone condense with the carbonyl group of NN-disubstituted aliphatic amides in the presence of sulphonyl chlorides to yield amide hydrazones.
openaire   +1 more source

Synthesis, antioxidant and anti-tyrosinase activity of 1,2,4-triazole hydrazones as antibrowning agents.

Food Chemistry, 2020
Zhiyun Peng, Guangcheng Wang, Qiao-Hui Zeng, Yufeng Li, Yi Wu, Haiquan Liu, Jing Jing Wang, Yong Zhao   +7 more
semanticscholar   +1 more source

Hexafluoroacetone hydrazone chemistry

Journal of Fluorine Chemistry, 1972
Abstract Hexafluoroacetone hydrazone condenses with ketones and aldehydes to give azines. β-Diketones give either azino-enols or hydrazino-ketones depending on the substrate. Aldehydes capable of aldol condensation and some α, β-unsaturated carbonyl compounds give pyrazoles.
openaire   +1 more source