Category: ethers-buliding-blocks

Wang, Baohe published the artcileIsobaric Vapor-Liquid Equilibria for (Water + 1-Methoxy-2-propanol), (Water + 2-Methoxy-1-propanol), and (1-Methoxy-2-propanol + 2-Methoxy-1-propanol) at 101.3 kPa, Related Products of ethers-buliding-blocks, the publication is Journal of Chemical & Engineering Data (2017), 62(4), 1341-1347, database is CAplus.

Isobaric vapor-liquid equilibrium (VLE) data were measured at 101.3 kPa for three binary systems (water + 1-methoxy-2-propanol), (water + 2-methoxy-1-propanol), and (1-methoxy-2-propanol + 2-methoxy-1-propanol) by using a modified Rose-Williams still, in which both vapor and liquid phases circulate continuously. Pos. deviations and azeotropic behaviors were found in systems (water + 1-methoxy-2-propanol) and (water + 2-methoxy-1-propanol), while a neg. deviation was found in the system (1-methoxy-2-propanol + 2-methoxy-1-propanol). All of the exptl. VLE data for the three binary systems were tested and verified to be thermodynamically consistent by the Herington area test and Van Ness point test. The nonideality of the vapor phase was corrected by the Hayden-O’Connell method. The exptl. isobaric VLE data were correlated by using the universal quasichem. (UNIQUAC) and nonrandom two-liquid (NRTL) models, and the binary interaction parameters for the two models were reported. Results showed that both models correlated the exptl. data with good accuracy.

Journal of Chemical & Engineering Data published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C9H7NO2, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Kunzek, Herbert published the artcileSelectively S-protected cysteine peptides. IV. Synthesis of cysteine peptides using the S-ethylthio protecting group. II, Formula: C2H8Cl2N4S2, the publication is Journal fuer Praktische Chemie (Leipzig) (1980), 322(2), 186-98, database is CAplus.

S-Guanylthiocysteine was treated with RSH (R = Et, Me₂CH) to give H-Cys(SR)-OH, which were treated with R¹F [R¹ = p-PhC₆H₄CMe₂O₂C (Bpoc), PhCMe₂O₂C (Ppoc)] to give R¹-Cys(R)-OH (R = Et, R¹ = Bpoc, Ppoc; R = CHMe₂, R¹ = Ppoc). Bpoc-Cys(SEt)-OH and Ppoc-Cys(SEt)-OH were used in the conventional solution synthesis of H-Val-Cys(SEt)-Ala-Leu-OCMe₃, which was coupled to BOC-Cys(SEt)-Cys(Dpm)-Ala-Gly-OH (BOC = Me₃CO₂C, Dpm = CHPh₂) by dicyclohexylcarbodiimide/N-hydroxybenzotriazole to give BOC-Cys(SEt)-Cys(Dpm)Ala-Gly-Val-Cys(SEt)-Ala-Leu-OCM₃ (I). In the above synthesis, the EtS group was stable in all steps, including deprotection of Bpoc and Ppoc group. I was EtS-deblocked by HSCH₂CH₂OH to give BOC-Cys-Cys(Dpm)-Ala-Gly-Val-Cys-Ala-Leu-OCMe₃, which was oxidized to give protected insulin A 6-13 analog II.

Journal fuer Praktische Chemie (Leipzig) published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C2H8Cl2N4S2, Formula: C2H8Cl2N4S2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Makowski, Philippe published the artcileChlorine borrowing: An efficient method for an easier use of alcohols as alkylation agents, Recommanded Product: 2-Isopropylanisole, the publication is Green Chemistry (2009), 11(1), 34-37, database is CAplus.

Chlorine functionalized tin dioxide nanoparticles proved able to partially convert alcs. into the corresponding chlorides, which act as alkylation agents with an increased electrophilicity, as evidenced on ether formation and Friedel-Crafts reactions.

Green Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Recommanded Product: 2-Isopropylanisole.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Huh, Chan Woo published the artcileHighly Stereoselective and Modular Syntheses of 10-Hydroxytrilobacin and Three Diastereomers via Stereodivergent [3 + 2]-Annulation Reactions, Category: ethers-buliding-blocks, the publication is Organic Letters (2008), 10(15), 3371-3374, database is CAplus and MEDLINE.

A convergent synthesis of the annonaceous acetogenin, 10-hydroxytrilobacin (I), was accomplished by using the [3+2]-annulation reaction of tetrahydrofuranyl carboxaldehyde II and allylsilane III. The stereodivergency of the [3+2]-annulation reaction made it possible to achieve modular, highly stereoselective syntheses of three 10-hydroxytrilobacin diastereomers from the same precursors by using simple modifications of reaction conditions.

Organic Letters published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C21H37BO, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Sun, Huikai published the artcileSynthesis of (+)-B-allyldiisopinocampheylborane and its reaction with aldehydes, Application In Synthesis of 99438-28-5, the publication is Organic Syntheses (2011), 87-101, database is CAplus and MEDLINE.

(+)-B-allyldiisopinocampheylborane (I) was prepared from (+)-B-methoxydiisopinocampheylborane and allylmagnesium bromide. Allylboration of achiral aldehydes by I gave secondary homoallylic alcs. stereoselectively. E.g., reaction of I and MeCHO gave 74% alc. (II). Allylboration of chiral aldehydes was also studied.

Organic Syntheses published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C28H41N2P, Application In Synthesis of 99438-28-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Karmel, Caleb published the artcileIridium-Catalyzed Silylation of Five-Membered Heteroarenes: High Sterically Derived Selectivity from a Pyridyl-Imidazoline Ligand, Category: ethers-buliding-blocks, the publication is Angewandte Chemie, International Edition (2020), 59(15), 6074-6081, database is CAplus and MEDLINE.

The steric effects of substituents on five-membered rings are less pronounced than those on six-membered rings because of the difference in bond angles. Thus, the regioselectivities of reactions of five-membered heteroarenes that occur with selectivities dictated by steric effects, such as the borylation of C-H bonds, were poor in many cases. The authors report that the silylation of five-membered-ring heteroarenes occurs with high sterically derived regioselectivity when catalyzed by the combination of [Ir(cod)(OMe)]₂ (cod = 1,5-cyclooctadiene) and a phenanthroline ligand or a new pyridyl-imidazoline ligand that further increases the regioselectivity. The silylation reactions with these catalysts produce high yields of heteroarylsilanes from functionalization at the most sterically accessible C-H bonds of these rings under conditions that the borylation of C-H bonds with previously reported catalysts formed mixtures of products or products that are unstable. The heteroarylsilane products undergo cross-coupling reactions and substitution reactions with ipso selectivity to generate heteroarenes that bear halogen, aryl, and perfluoroalkyl substituents.

Angewandte Chemie, International Edition published new progress about 1073339-22-6. 1073339-22-6 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic Acids,Boronic acid and ester, name is 2-(4-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C11H17BO3S, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Paterson, Ian published the artcileSynthetic studies towards iriomoteolide 1a: stereocontrolled construction of C1-C9 and C11-C23 segments using lactate aldol chemistry, HPLC of Formula: 99438-28-5, the publication is Synlett (2010), 571-574, database is CAplus.

Nonracemic undecenal I (TES = Et₃Si) and nonracemic butenyldihydropyranone II (PMB = 4-MeOC₆H₄CH₂), C13-C23 and C1-C9 segments of the cytotoxic macrolide iriomoteolide 1a III, are prepared using stereoselective boron-mediated aldol additions (using both enantiomers of a nonracemic lactate-derived ketone) and a Suzuki-Miyaura cross-coupling reaction as the key steps.

Synlett published new progress about 99438-28-5. 99438-28-5 belongs to ethers-buliding-blocks, auxiliary class Chiral,Aliphatic cyclic hydrocarbon, name is (+)-B-Methoxydiisopinocampheylborane, and the molecular formula is C21H37BO, HPLC of Formula: 99438-28-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Yang, Yong published the artcileUltrasonic synthesis of poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene], HPLC of Formula: 146370-51-6, the publication is Gaofenzi Xuebao (2006), 892-896, database is CAplus.

Poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) is a typical example of solution processable conjugated polymers for polymeric light emitting diodes application, which shows good solubility in common organic solvents. However, gelation or micro-gelation always occurs during the polymerization process. Herein, we report the synthesis of fully soluble MEH-PPV by ultrasonic irradiation method. The raw material was 4-methoxyphenol, and ultrasonic irradiation method was used in the etherification, bromomethylation and polymerization The polymer is prepared from the bis-bromomethyl monomer through the Gilch route. Compared with the conventional mech. stirring, ultrasonic irradiation method has shown great advantages with respect to the shorter reaction time, lower reaction temperature, higher yields and higher mol. weight (M_n) of MEH-PPV. The optimized reaction conditions including reaction solvent, temperature, and time, were determined for the related etherification, bromomethylation and polymerization with ultrasonic method. Especially, using ultrasonic method, the gelation in the polymerization had been overcome. MEH-PPV obtained was fully soluble in THF and chloroform and no gel or micro-gel existed. The structures of the intermediate products and MEH-PPV were determined by IR and ¹H-NMR. It was found the MEH-PPV synthesized by ultrasonic irradiation processes had higher luminescence quantum efficiency than that by mech. stirring.

Gaofenzi Xuebao published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C10H6Br2, HPLC of Formula: 146370-51-6.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Hwang, Jimin published the artcileSynthesis and evaluation of RNase L-binding 2-aminothiophenes as anticancer agents, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde, the publication is Bioorganic & Medicinal Chemistry (2022), 116653, database is CAplus and MEDLINE.

Aminothiophene is a scaffold that is widely present in drugs and biol. active small mols. as chem. probes. In this study, 43 compounds sharing a 2-aminothiophenone-3-carboxylate (ATPC) scaffold, known to activate the RNase L (RNase L), were synthesized and selected ATPCs showed enhancement of thermal stability of RNase L upon binding. Screening of antiproliferation activities against human cancer cell lines revealed that ATPCs represented by compounds 4l and 50 showed potent single-digit micromolar antiproliferation activity against human cancer cell lines. Compounds 4l and 50 exhibited time- and dose-dependent proliferation inhibition, induced cellular apoptosis measured by cleaved PARP and via flow cytometry, inhibited cell migration, and inhibited cell colony formation. Combining the results reported in this work, ATPCs were evaluated as potential anticancer agents mediated by RNase L-binding and apoptosis induction. The work contributes to the study on the polypharmacol. properties of aminothiophene-containing small mols.

Bioorganic & Medicinal Chemistry published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Application of 4-Hydroxy-3,5-dimethoxybenzaldehyde.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Senthilkumar, P. published the artcileAntibacterial activity of 26-member [2 + 2] macrocycles: a structure-reactivity study, Safety of 1,2-Dimethoxybenzene, the publication is World Journal of Pharmaceutical Research (2022), 11(1), 1103-1113, database is CAplus.

26 Member [2 + 2] macrocyclic Schiff base compounds were investigated for their antibacterial activity against Gram pos. and Gram neg. bacteria. The recorded data of zone of inhibition showed significant broad activity when compared with standard The structure reactivity correlation of the compounds has been studied. The antibacterial searching suggests that all the synthesized macrocyclic compounds showed moderate to very good activity against the tested organisms. Among the compounds, -COOH substituted compound showed the most promising antibacterial activity. The inhibition zone diameters of these compounds have been correlated with Hammett substituent constants, F and R parameters. From the results of statistical anal., the effects of substituent on the antibacterial activity of compounds have been studied.

World Journal of Pharmaceutical Research published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C17H18N2O6, Safety of 1,2-Dimethoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem