Month: February 2023

Graft polymerization of ethyl acrylate onto polyvinyl alcohol using Ce⁴⁺ – dextrose redox initiator was written by Chowdhury, P.;Chowdhury, N. D.. And the article was included in Journal of Polymer Materials in 1999.SDS of cas: 14431-43-7 This article mentions the following:

Et acrylate (EA) was graft polymerized onto polyvinyl alc. (PVA) using ceric ammonium sulfate (CAS)-dextrose monohydrate (DM) redox initiator in aqueous medium. The grafting efficiency (GE) of EA was studied as a function of monomer concentration, initiator concentration, time, pH, and temperature The GE was optimum for concentrations of CAS 12.64 × 10^-3 mol/L, DM 2.52 × 10^-3 mol/L, PVA 2.0 g/L, EA 0.552 mol/L, and H₂SO₄ 0.18 mol/L, temperature 45°C, and time 3.5 h. Acid hydrolysis and IR spectroscopy were used for the confirmation of graft copolymer formation. The X-ray diffraction anal. and TGA of PVA and a representative graft copolymer were undertaken. A mechanism of grafting was suggested. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7SDS of cas: 14431-43-7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyrans are also used as important solvents, as chemical intermediate and as monomer for ring-opening polymerization. The reaction of tertiary 1,4- and 1,5-diols with cerium ammonium nitrate at room temperature gives tetrahydrofuran and tetrahydropyran derivatives in high yield and stereoselectivity. Various fragrant compounds have been synthesized using this method.SDS of cas: 14431-43-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Comparative studies on the antimicrobial activity of α,β-unsaturated aldehydes was written by Beilfuss, Wolfgang. And the article was included in Zentralblatt fuer Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene, Abteilung 1: Originale, Reihe A: Medizinische Mikrobiologie und Parasitologie in 1976.Synthetic Route of C6H8O2 This article mentions the following:

Dilute emulsions of 15 straight-chain, branched-chain, or cyclic, α, β-unsaturated aldehydes were tested for antimicrobial activity against bacteria (including Bacillus subtilis spores and Mycobacterium smegmatis), fungi, and yeasts. The straight-chain compounds had a somewhat greater bacteriostatic and fungistatic action than did the branched-chain compounds Considerable structure-activity dependencies were found with respect to germicidal action: the activity increased with increasing number of total C atoms, reaching a maximum at C8-10; α-alkyl-substituted compounds had the best germicidal action. Compounds with high activity and broad spectrum of action included 2-ethyl-2-hexenal [645-62-5], 2-isopropyl-5-methyl-2-hexenal [35158-25-9], and 2-propyl-2-heptenal [34880-43-8], which showed especially good effect against B. subtilis spores and M. smegmatis. In the experiment, the researchers used many compounds, for example, 5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7Synthetic Route of C6H8O2).

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) belongs to tetrahydropyran derivatives. Tetrahydropyran is a useful synthetic intermediate. Tetrahydropyranyl (THP-) ethers derived from the reaction of alcohols and dihydropyran are common intermediates in organic synthesis. There is large number of marine macrolide natural products that contain tetrahydropyran and tetrahydrofuran ring together. For instance, goniodomin A (actin targeting polyether), prorocentrolide (toxin halistatins), and percentotoxineSynthetic Route of C6H8O2

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Synthesis and characterization of achiral bent-core liquid crystalline molecules containing salicylaldimine-based with a wide temperature range of SmCP phase was written by Liao, Chien-Tung;Liu, Jung-Yo;Zou, Sing-Fang;Wu, Nien-Chieh;Wu, Zheng-Long;Lee, Jiunn-Yih. And the article was included in Journal of the Chinese Chemical Society (Taipei, Taiwan) in 2010.HPLC of Formula: 1287777-05-2 This article mentions the following:

The design and synthesis of a series bent-core materials base on a 3,4′-biphenyldiol central core containing salicylaldimine-based and two terminal tetradecyloxy tails are reported. In addition, the effects of lateral substituents (R = F and Cl) at the biphenyl core into 3′-position are examined These substituents have a strong influence in reducing the clearing temperatures and increasing temperature range of SmCP phase. Upon cooling process the isotropic liquid, compound SB-Cl exhibits the lowest clearing transition temperature of 180°C and the widest SmCP phase range of 129°C. The mesophase behavior were investigated by polarizing optical microscopy (POM), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and electro-optical (EO) measurements in the mesophase temperature range. In the experiment, the researchers used many compounds, for example, 3-[(2-Tetrahydropyranyl)oxy]phenylboronic Acid (cas: 1287777-05-2HPLC of Formula: 1287777-05-2).

3-[(2-Tetrahydropyranyl)oxy]phenylboronic Acid (cas: 1287777-05-2) belongs to tetrahydropyran derivatives. Numerous natural products have tetrahydropyran skeleton as the building block for designing new natural products and their derivatives e.g. aplysiatoxins, avermectins, oscillatoxins, talaromycins, latrunculins and acutiphycins. Pyran derivatives such as pyran flavonoids are biologically important. Monosaccharides containing six-membered rings are called pyranose.HPLC of Formula: 1287777-05-2

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics