Tag: M.W=250-300

Dodgson, K. S. published the artcileMetabolic fate of the ester sulfate group of potassium p- nitrophenylsulfate-S³⁵, Application In Synthesis of 6217-68-1, the publication is Biochemical Journal (1960), 154-9, database is CAplus and MEDLINE.

After intraperitoneal injection of K p-nitrophenyl sulfate-S³⁵ (I) to male and female rats, the bulk of the S³⁵ appears in the urine within 24 hrs. Up to 30% of the S³⁵ of the original dose appears in the urine as inorganic sulfate-S³⁵, most of the remainder appearing as ester sulfate-S³⁵. Chromatographic examination of the urines shows the presence of at least 10 radioactive sulfate esters in addition to I. The chromatographic pattern is very similar to that obtained with the urines of rats receiving Na₂S³⁵O₄ by intraperitoneal injection. After 48 hrs. the S³⁵ is still present in the tissues. Incorporation of S³⁵ into chondroitinsulfate of skin and cartilage and into liver taurine has been demonstrated.

Biochemical Journal published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Application In Synthesis of 6217-68-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dai, Jian-Jun published the artcileElectrochemically promoted decarboxylative borylation of alkyl N-hydroxyphthalimide esters, HPLC of Formula: 1850305-80-4, the publication is Chinese Chemical Letters (2022), 33(3), 1555-1558, database is CAplus.

An electrochem. promoted decarboxylative borylation reaction is reported. The reaction proceeds under mild conditions in an undivided cell without use of transition metal- or photo-catalysts. The key feature of the reaction is the compatibility of diboron reagents with the electrochem. conditions. This reaction exhibits broad substrate scope, good functional group tolerability, and easy scalability.

Chinese Chemical Letters published new progress about 1850305-80-4. 1850305-80-4 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester,Boronic Acids,Boronate Esters, name is tert-Butyl N-[3-(tetramethyl-1,3,2-dioxaborolan-2-yl)propyl]carbamate, and the molecular formula is C14H28BNO4, HPLC of Formula: 1850305-80-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Khanal, Durga D. published the artcileEnhancing the selectivity of polar hydrophilic analytes with a low concentration of barium ions in the mobile phase using geopolymers and silica supports, Category: esters-buliding-blocks, the publication is Talanta (2020), 120339, database is CAplus and MEDLINE.

Charged analytes such as organic sulfonic acids, sulfates, carboxylates, and phosphates are often analyzed by hydrophilic interaction liquid chromatog. (HILIC). In many cases, these analytes do not show any selectivity and elute near the dead time using the conventional acetonitrile-ammonium acetate buffers. In this work, we introduce a powerful selectivity enhancing technique by using a trace amount of Ba²⁺ ion in the mobile phase as a general approach for HILIC with UV-Vis detection. Silica and a newly developed material called geopolymers are used as stationary phases. Geopolymers are X-ray amorphous aluminosilicate inorganic polymers with cation exchange properties. Barium exchanged geopolymers (Ba-NM-GP) are synthesized from metakaolin based geopolymer. Thorough characterization of Ba-NM-GP is reported using SEM (SEM), energy dispersive spectroscopy (EDS), Brunauer-Emmett-Teller (BET) surface area analyzer and laser diffraction particle size distribution analyzer for the determination of their shape, size, porosity, surface area and particle size distribution resp. It is demonstrated that in the absence of Ba²⁺, baseline separations of sulfonates, carboxylates, and phosphates is not possible, whereas, in the presence of Ba²⁺ in the mobile phase, these analytes are easily separated Barium perchlorate is suggested as an additive for it is UV transparent, and it has practically an unlimited solubility in acetonitrile.

Talanta published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Suzuki, Sakaru published the artcileEnzymic transsulfation from a phenol to carbohydrates, Quality Control of 6217-68-1, the publication is Biochimica et Biophysica Acta (1957), 444-5, database is CAplus and MEDLINE.

cf. C.A. 51, 2184c. Although charoninsulfuric acid (I) (a glucan polysulfate present in the mucous gland of Charonia lampas) did not incorporate S³⁵O₄^— in the presence of an Me₂CO powder of mucous gland alone, sulfation of I occurred in the presence of this Me₂CO powder when p-nitrophenylsulfuric acid was present as sulfate donor in a suitable incubation mixture From this and other results it was concluded that S³⁵O₄^— was incorporated into carbohydrate from p-nitrophenylsulfate by enzymic transsulfation, and no incorporation took place from inorganic S³⁵O₄^—.

Biochimica et Biophysica Acta published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C19H34ClN, Quality Control of 6217-68-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Seki, Toshimi published the artcileStudies on agents with vasodilator and β-blocking activities. III. Synthesis and activity of optical isomers of TZC-1370, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Chemical & Pharmaceutical Bulletin (1995), 43(10), 1719-23, database is CAplus and MEDLINE.

Optical isomers of TZC-1370 were prepared from (R)- and (S)-1-(2-chlorophenoxy)-2,3-epoxypropane. When given i.v. to anesthetized rats, the (S)-isomer was about 40 times more potent in terms of β-blocking activity than the (R)-isomer, while their hypotensive activities were equipotent with that of the racemic compound, TZC-1370.

Chemical & Pharmaceutical Bulletin published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C15H12O6, Recommanded Product: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Deng, Lin published the artcileNovel chalcone-based phenothiazine derivative photoinitiators for visible light induced photopolymerization with photobleaching and good biocompatibility, Formula: C15H20O6, the publication is Progress in Organic Coatings (2022), 106859, database is CAplus.

Two novel visible light photoinitiators 4-(10-methyl-10H-phenothiazin-3-yl) but-3-en-2-one (PBO) and (1E,4E)-1,5-bis(10-methyl-10H-phenothiazin-3-yl)-1,4-pentadien-3-one (BMPPO) were successfully designed and synthesized. PBO and BMPPO have broad absorption range from 350 to 500 nm with the maximum absorption wavelength at 400 nm and 440 nm resp. Three-component photoinitiating system of BMPPO/iodonium/amine was developed for free radical polymerization of acrylates. The results demonstrated that the photoinitiating system displayed rapid polymerization and high final vinyl group conversions under the irradiation of UV-LED (365 nm), blue LED (440) nm and solar light resource. Moreover, photopolymerization kinetics was studied by real-time FT-IR spectrum, the double band conversion was achieved up to 90% for BMPPO. The photocuring mechanism was identified via steady state photolysis and ESR spin-trapping experiments The possible photoinduced mechanism of PBO and BMPPO in the presence of a co-initiator occurred through electron transfer. In addition, BMPPO possesses rapid photobleaching and good biocompatibility performance tested by photoinduced degradation and cytotoxicity experiments resp., which exhibited that BMPPO has potential for light-color coatings and food packaging field.

Progress in Organic Coatings published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Formula: C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ulriksdotter, J. published the artcileAllergic contact dermatitis caused by dipropylene glycol diacrylate in the Omnipod insulin pump, Application of Trimethylolpropane triacrylate, the publication is British Journal of Dermatology (2022), 186(2), 334-340, database is CAplus and MEDLINE.

Cases of allergic contact dermatitis (ACD) caused by isobornyl acrylate (IBOA) in the Omnipod insulin pump have previously been reported. To present three cases of patients with ACD caused by a new allergen in the pump, and results from chem. analyses. Omnipod pumps from different batches were analyzed by gas chromatog.-mass spectrometry. Aimed testing, with the department’s medical device (MD) series and substances identified in the pump including dipropylene glycol diacrylate (DPGDA) at 0·01% and 0·1% in petrolatum (pet.), was performed. Patch testing also included extracts from the device, the adhesive patch as is, and allergens from baseline series. All patients tested pos. to 0·1% DPGDA in pet., and two patients addnl. to a 0·01% concentration DPGDA was found in extracts of the Omnipod pumps brought by the patients. An Omnipod pump from an earlier batch contained tripropylene glycol diacrylate, IBOA, N,N-dimethylacrylamide, di(ethylene glycol)ethyl ether acrylate (DEGEA) but no DPGDA. One of the patients reacted pos. to all of these allergens except DEGEA, which was not tested. When suspecting ACD to MDs, DPGDA at 0·1% in pet. should be tested. The contents of Omnipod have changed over time. Patch testing with updated test series and relevance assessment of pos. reactions is a delicate task. Children, with lifelong use of MDs, risk contracting many allergies with potential cross-allergies. A question should be raised as to whether these low mol. weight acrylates should be used at all in devices constantly worn on the skin.

British Journal of Dermatology published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C10H18O, Application of Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Thompson, David H. published the artcileSynthesis of Chiral Diether and Tetraether Phospholipids: Regiospecific Ring Opening of Epoxy Alcohol Intermediates Derived from Asymmetric Epoxidation, Formula: C9H9NO6S, the publication is Journal of Organic Chemistry (1994), 59(11), 2945-55, database is CAplus.

Diether and tetraether glycerophospholipids, e.g. I (R = CH₂CH₂N⁺Me₂, R¹ = C₈H₁₇, n = 16; R¹ = C₁₀H₂₁, n = 20), have been synthesized using chiral epoxy alc. starting materials (e.g. glycidol 3-nitrobenzenesulfonate esters or tert-butyldiphenylsilyl ethers) via regioselective oxirane ring cleavage of epoxides, e.g. II.. These chiral precursors provide control over the stereochem., substitution patterns, and steric properties of the phosphoglycerol backbone. Bolaamphiphiles adopted a U-shaped conformation at the air-water interface.

Journal of Organic Chemistry published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C7H11N, Formula: C9H9NO6S.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Xia, Mengling published the artcileCompact and large-area perovskite films achieved via soft-pressing and multi-functional polymerizable binder for flat-panel X-ray imager, Product Details of C15H20O6, the publication is Advanced Functional Materials (2022), 32(16), 2110729, database is CAplus.

Thanks to its strong X-ray absorption and large carrier diffusion length, perovskites have demonstrated excellent performance for X-ray detection. Combination of perovskite with thin-film transistor (TFT) arrays to construct flat-panel X-ray imager (FPXI) is required for X-ray imaging, yet this is rarely reported. Solution processing of perovskite thick film onto TFT can enable the electronic connection, however the amounts of pinholes inevitably form during the solvent evaporation and result in a porous film with deteriorated performance and stability. Here a novel strategy is raised to achieve high-quality perovskite thick films for TFT integration via soft-pressing and in situ polymerization of multi-functional binder (TMTA). The combined process largely eliminates the pinholes, improves the surface smoothness, passivates grains boundaries, reduces ionic migration, and improves stability. Accordingly, a compact and smooth MAPbI₃ thick film integrating with TFT arrays is prepared for flat-panel X-ray imaging. The largest film (28 x 28 cm²) is obtained with the state-of-the-art performance (ratio of sensitivity to noise current: 1.41 x 10¹¹ μC Gy^-1 A^-1) among polycrystalline films. It is hoped that the work provides guidance for fabricating compact perovskite thick films and push perovskite FPXI one step further for low-dose X-ray imaging.

Advanced Functional Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C7H13ClNNaO5S, Product Details of C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dodgson, K. S. published the artcileSulfatase. XI. The purification and properties of the arylsulfatase of Alcaligenes met-alcaligenes, Formula: C6H4KNO6S, the publication is Biochemical Journal (1955), 374-80, database is CAplus and MEDLINE.

cf. C.A. 49, 13305c. The arylsulfatase of A. met-alcaligenes was concentrated and partially separated from nucleic acid and from other enzymes by paper electrophoresis. The enzyme concentrate gave pH-activity and substrate concentration-activity curves which were very similar to those obtained previously with the stage B enzyme (loc. cit.). The ratio of the activities towards the 3 substrates under the resp. optimum conditions was 5.2 p-acetylphenyl (APS), 5.0 p-nitrophenyl (NPS), and 1.0 nitrocatechol (NCS) sulfates, calculated on a molar basis. When account was taken of the inhibition by excess of substrate and the true V_maximum calculated the ratio became 15.1:14.4:1.0. The Michaelis constants, K_m, for the 3 substrates were 9.0, 4.75, and 2.2 × 10^-4M, resp. The heat of activation with NPS was 11 kcal./mol. Inhibition was obtained with the following substances at 0.025M: NaHSO₃ 17%, NaCN 82, NaHSO₃ 34, BaCl₂ 100, glucose 6-sulfate 17, K Et sulfate 12, Na benzenesulfonate 22, phenylhydrazine (0.0001 M) 87, hydrazine 43, semicarbazide 21, thiosemicarbazide 33, dimedone (0.05%, weight/volume) 27, Girards’ reagent P (2.5% weight/volume) 25, NH₂OH 97. Inhibition by p-chloromercuribenzoic acid could not be reversed by cysteine or glutathione. 2,4-Dinitrofluorobenzene at 0.005M gave 100% inhibition. The curves obtained by plotting pK_m against pH have shown the presence in the enzyme of 2 different substrate-binding groups: pK 8.2 and 9.4.

Biochemical Journal published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Formula: C6H4KNO6S.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics