Results 1 to 10 of about 146,026 (303)

A Novel Family of [1,4]Thiazino[2,3,4-ij]quinolin-4-ium Derivatives: Regioselective Synthesis Based on Unsaturated Heteroatom and Heterocyclic Compounds and Antibacterial Activity

Molecules, 2021
A novel family of [1,4]thiazino[2,3,4-ij]quinolin-4-ium derivatives was synthesized by annulation reactions of 8-quinolinesulfenyl chloride with unsaturated heteroatom and heterocyclic compounds.
Vladimir A. Potapov, Roman S. Ishigeev, Lyudmila A. Belovezhets, Svetlana V. Amosova   +3 more
doaj   +1 more source

Mechanical and Microstructural Properties of Redispersible Polymer-Gypsum Composites [PDF]

Materials Research, 2019
Studies on gypsum modified by polymers have been conducted to assess the potential of improvement in the mechanical performance, water resistance and increasing the setting time, facilitating its handling.
Carlos Eduardo Marmorato Gomes, Adla Kellen Dionísio Sousa, Maria Emília da Silva Oliveira Araujo, Sara Beloti Ferreira, Patricia Fontanini   +4 more
doaj   +1 more source

Facile synthesis of vinyl esters of aromatic carboxylic acids with participation of 2-chloro-4,6-dimethoxy-1,3,5-triazine [PDF]

E3S Web of Conferences, 2023
In this work, the reaction of derivatives of benzoic acid containing substituents in the aromatic ring (1a-o) with 2-chloro-4,6dimethoxy-1,3,5-triazine (4) in the presence of N-methylmorpholine (6) has been synthesized active triazine esters of ...
Parmanov A., Nurmanov S., Tursunov Sh., Erkhanova Yu.   +3 more
doaj   +1 more source

Efficient Regioselective Synthesis of Novel Water-Soluble 2H,3H-[1,4]thiazino[2,3,4-ij]quinolin-4-ium Derivatives by Annulation Reactions of 8-quinolinesulfenyl Halides

Molecules, 2021
Regioselective synthesis of novel 2H,3H-[1,4]thiazino[2,3,4-ij]quinolin-4-ium derivatives has been developed by annulation reactions of 8-quinolinesulfenyl halides with vinyl chalcogenides (vinyl ethers, divinyl sulfide, divinyl selenide and phenyl vinyl
Vladimir A. Potapov, Roman S. Ishigeev, Svetlana V. Amosova   +2 more
doaj   +1 more source

Synthesis and characterization of furfural-functionalized poly(vinyl alcohol) cross-linked with maleimide bearing tributyltin groups

eXPRESS Polymer Letters, 2022
In the present work, new cross-linked networks based on furfural-functionalized poly(vinyl alcohol) (PVF) and maleimide compounds containing tributyltin groups were synthesized. The networks were obtained both as films and porous membranes. The structure
Viorica Gaina, Oana Ursache, Constantin Gaina, Irina Rosca, Ana-Lavinia Vasiliu   +4 more
doaj   +1 more source

Microbial Screening Based on the Mizoroki–Heck Reaction Permits Exploration of Hydroxyhexylitaconic-Acid-Producing Fungi in Soils

Microorganisms, 2020
Recently, we developed a unique microbial screening method based on the Mizoroki–Heck reaction for itaconic acid (IA)-producing fungi. This method revealed that 37 out of 240 fungal strains isolated from soils produce vinyl compounds, including IA.
Mei Sano, Ryoki Yada, Yusuke Nomura, Takahiro Kusukawa, Hiroshi Ando, Keiji Matsumoto, Kazuhito Wada, Tomonari Tanaka, Hitomi Ohara, Yuji Aso   +9 more
doaj   +1 more source

Effects of substituents on the 1H-NMR chemical shifts of 3-methylene-2-substituted-1, 4-pentadienes [PDF]

Journal of the Serbian Chemical Society, 2003
The principle of linear free energy relationships was applied to the 1H chemical shifts of the β-vinyl proton atoms of 3-methylene-2-substituted-1,4-pentadienes.
Valentić Nataša V., Ušćumlić Gordana S.   +1 more
doaj   +1 more source

5-Vinyl-1H-tetrazole

Molbank, 2023
Highly purified 5-vinyl-1H-tetrazole was synthesized, which is in great demand in modern medicine and industry as a monomer for obtaining nitrogen-rich macromolecular compounds and a reagent for the complete synthesis of biological compounds.
Daria M. Krygina, Eugene V. Sivtsov, Yuliya N. Pavlyukova, Ekaterina N. Chernova, Mariya A. Skryl’nikova, Vadim A. Baigildin, Aleksandra M. Puzyk, Alexander A. Oskorbyn, Rostislav E. Trifonov, Pavel A. Aleshunin, Vladimir A. Ostrovskii   +10 more
doaj   +1 more source

Stereospecific cationic RAFT polymerization of bulky vinyl ethers and stereoblock poly(vinyl alcohol) via mechanistic transformation to radical RAFT polymerization of vinyl acetate

Giant, 2021
The simultaneous control of molecular weight and tacticity in cationic polymerization remains challenging. Here, we propose a new approach for stereospecific living cationic polymerization by combining cationic reversible addition-fragmentation chain ...
Mineto Uchiyama, Kotaro Satoh, Masami Kamigaito   +2 more
doaj   +1 more source

An isatin aldol adduct as a precursor to α,α’-difunctionalized methyl vinyl ketones

Results in Chemistry, 2022
Isatin-methyl vinyl ketone aldol adducts underwent efficient Morita–Baylis–Hillman (MBH) and Rauhut–Currier (RC) reactions under mild conditions to bring about a functionalization of the olefinic α-carbon, and thereby α,α’-difunctionalization of methyl ...
Ajit Kumar Jha, Deeksha, Heena Inani, Srinivasan Easwar   +3 more
doaj   +1 more source