Category: ethers-buliding-blocks

Thoma, K. published the artcileColloid association and bioavailability of local anesthetics. Part 7. Partition behavior, Safety of 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, the publication is Pharmaceutica Acta Helvetiae (1988), 63(6), 155-9, database is CAplus and MEDLINE.

The partition coefficient was determined for 20 local anesthetics and was found to be considerably influenced by the chem. structure and the substituents present in the compounds In the system n-octanol/buffer (pH 5.7) partition coefficients between 0.05 (brufacaine-HCl) and 199.0 (chinisocaine-HCl) were found. In the system n-octanol/water they ranged between 0.003 (procaine-HCl and lidocaine-HCl) and 4.2 (oxetacaine-HCl). Raising the pH-value from 4 to 6 resulted in an increase of the partition coefficient of stadacain-HCl from 8.9 to 56.5. Raising the ionic strength from 0.2 to 1.0 of a pH 5.7 buffer increased the partition coefficient of stadacain-HCl from 30.4 to 95.3%. The addition of 5.0% NaCl to an aqueous, unbuffered solution of stadacain-HCl increased the partition coefficient from 0.36 to 27.2.

Pharmaceutica Acta Helvetiae published new progress about 637-58-1. 637-58-1 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, and the molecular formula is C5H5BrN2, Safety of 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride.

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

Hattori, Hiromu published the artcileTotal Synthesis of Tiacumicin A. Total Synthesis, Relay Synthesis, and Degradation Studies of Fidaxomicin (Tiacumicin B, Lipiarmycin A3), Related Products of ethers-buliding-blocks, the publication is Journal of Organic Chemistry (2018), 83(13), 7180-7205, database is CAplus and MEDLINE.

The com. macrolide antibiotic fidaxomicin was synthesized in a highly convergent manner. Salient features of this synthesis include a β-selective noviosylation, a β-selective rhamnosylation, a ring closing metathesis, a Suzuki coupling and a vinylogous Mukaiyama aldol reaction. Careful choice of protecting groups and fine tuning of the glycosylation reactions led to the first total synthesis of fidaxomicin. In addition, a relay synthesis of fidaxomicin was established, which gives access to a conveniently protected intermediate from the natural material for derivatization. The first total synthesis of a related congener, tiacumicin A, is presented.

Journal of Organic Chemistry 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, Related Products of ethers-buliding-blocks.

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

Kaneda, Masato published the artcileStructure-Activity Relationship Study on Odoamide: Insights into the Bioactivities of Aurilide-Family Hybrid Peptide-Polyketides, Application of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, the publication is ACS Medicinal Chemistry Letters (2018), 9(4), 365-369, database is CAplus and MEDLINE.

Odoamide is a cytotoxic peptide-polyketide hybrid mol. isolated from the Okinawan marine cyanobacterium Okeania sp. For an efficient structure-activity relationship study of the peptide part of odoamide, a facile synthetic protocol was established using a solid-phase peptide synthesis. Among a series of peptides, the D-MeAla6 isomer exhibited a more potent cytotoxicity than natural odoamide. It was also demonstrated that the 26-membered macrocyclic natural odoamide I and the 24-membered isomer with comparable cytotoxicities were slowly interconvertible, and both isomers contributed to the potent cytotoxicity of odoamide. Examination of the physicochem. properties revealed that the in vitro cytotoxicity was affected by the serum protein binding of odoamide derivatives, while the differences in the macrocyclic structures had no significant effect on the membrane permeability.

ACS Medicinal Chemistry Letters published new progress about 77128-73-5. 77128-73-5 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid, and the molecular formula is C25H23NO4, Application of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)-3-phenylpropanoic acid.

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

Jacobs, Emily published the artcileExperimental and Computational Studies towards Chemoselective C-F over C-Cl Functionalisation: Reversible Oxidative Addition is the Key, COA of Formula: C11H10O, the publication is ChemCatChem (2021), 13(2), 637-645, database is CAplus.

Catalytic cross-coupling is a valuable tool for forming new carbon-carbon and carbon-heteroatom bonds, allowing access to a variety of structurally diverse compounds However, for this methodol. to reach its full potential, precise control over all competing cross-coupling sites in poly-functionalized building blocks is required. Carbon-fluorine bonds are one of the most stable bonds in organic chem., with oxidative addition at C-F being much more difficult than at other C-halide bonds. As such, the development of methods to chemoselectively functionalize the C-F position in poly-halogenated arenes would be very challenging if selectivity was to be induced at the oxidative addition step. However, metal-halide complexes exhibit different trends in reactivity to the parent haloarenes, with metal-fluoride complexes known to be very reactive towards transmetalation. In this current work, we sought to exploit the divergent reactivity of Ni-Cl and Ni-F intermediates to develop a chemoselective C-F functionalization protocol, where selectivity is controlled by the transmetalation step. Our exptl. studies highlight that such an approach is feasible, with a number of nickel catalysts shown to facilitate Hiyama cross-coupling of 1-fluoronaphthalene under base-free conditions, while no cross-coupling with 1-chloronaphthalene occurred. Computational and exptl. studies revealed the importance of reversible C-Cl oxidative addition for the development of selective C-F functionalization, with ligand effects on the potential for reversibility also presented.

ChemCatChem published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, COA of Formula: C11H10O.

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

Kadu, Vikas D. published the artcileRapid One-Pot Aerobic Oxidative N-α-C(sp³)-H Functionalization of Arylmethylamines to Access Tetrasubstituted Imidazoles, Recommanded Product: (2-Methoxyphenyl)methanamine, the publication is Asian Journal of Organic Chemistry (2022), 11(8), e202200162, database is CAplus.

A simple copper catalyzed “one-pot” process has been developed for synthesis of polysubstituted imidazoles via direct oxidative N-α-C(sp³)-H functionalization of arylmethylamines. The readily available arylmethylamines as substrates have afforded tetrasubstituted imidazoles products up to 94% yields under mild and environmentally benign conditions. The explored substrates scope with 1,2-diketones and α-hydroxyketones have shown great utility for synthesis of tetrasubstituted imidazoles.

Asian Journal of Organic Chemistry published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H11NO, Recommanded Product: (2-Methoxyphenyl)methanamine.

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

Huang, Long published the artcileBioinspired desaturation of alcohols enabled by photoredox proton-coupled electron transfer and cobalt dual catalysis, Name: 2-Methoxynaphthalene, the publication is Nature Communications (2022), 13(1), 809, database is CAplus and MEDLINE.

In the biosynthesis of sterols an enzyme-catalyzed demethylation is achieved via a stepwise oxidative transformation of alcs. e.g., 1-(4-methoxyphenyl)cyclodecan-1-ol to olefins e.g., 4-(OCH₃)C₆H₄C(O)(CH₂)₇CH=CH₂. The overall demethylation proceeds through two sequential monooxygenation reactions and a subsequent dehydroformylative saturation To mimic the desaturation processes observed in nature, photoredox proton-coupled electron transfer (PCET) and cobaloxime chem. were successfully integrated for the acceptorless dehydrogenation of alcs. The state-of-the-art remote and precise desaturation of ketones RC(O)(CH₂)₃CH=CH₂ [R = 4-(tert-butoxy)phenyl, phenanthren-9-yl, 1-benzothiophen-2-yl, etc.] proceeds efficiently through the activation of cyclic alcs. I using bond-dissociation free energy (BDFE) as thermodn. driving force. The resulting transient alkoxyl radical allows C-C bond scission to generate the carbon-centered radical remote to the carbonyl moiety. The key intermediate is subsequently combined with cobaloxime photochem. to furnish the alkene. Moreover, the mild protocol can be extended to desaturation of linear alcs. as well as aromatic hydrocarbons. Application to bioactive mols. and natural product derivatives is also presented.

Nature Communications published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C11H10O, Name: 2-Methoxynaphthalene.

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

Wang, Ruikun published the artcileForming mechanism of coke microparticles from polymerization of aqueous organics during hydrothermal carbonization process of biomass, Formula: C9H10O4, the publication is Carbon (2022), 50-60, database is CAplus.

Corn stalk was selected as a typical biomass, and the growth mechanism of coke microparticles was studied. The coke microparticles that formed from through the polymerization of aqueous organics during the hydrothermal carbonization (HTC) showed a considerable effect on the mass yield and physicochem. properties of the hydrochar. Results indicated that the average particle size of the coke microparticles rapidly increased to 6.25μm within the initial 2 h of HTC. The lower C/O at. ratio of the surface layer of the coke microparticles than that of the core, suggested that the core had a higher carbonization degree than the shell. On the basis of various measurements, the coke microparticles were inferred to have formed through the two stages of micronuclei formation and growth. Dissolved organics, including furfurals, furans, and phenols polymerized each other into aromatized macromols., and then formed solid-phase micronuclei. Subsequently, the oxygen containing groups of the micronuclei formed bonded with aqueous organic mols., as a result, the micronuclei grew up into coke microparticles. Meanwhile, the carbonization degree of the coke microparticles was enhanced due to continuous intra- and inter-mol. dehydration and decarboxylation reactions occurred between hydroxyl and carboxyl groups.

Carbon 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 C14H31NO2, Formula: C9H10O4.

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

Zhou, Jun published the artcileEtherification of Fluoroarenes with Alkoxyboronic Acid Pinacol Esters via C-F Bond Cleavage, Synthetic Route of 91-16-7, the publication is Organic Letters (2022), 24(28), 5084-5089, database is CAplus and MEDLINE.

Potassium-base-mediated defluoroetherification of aryl and heteroaryl fluorides with alkoxyboronic acid pinacol esters under transition-metal-free conditions is reported. This protocol efficiently and safely provides a wide variety of aryl ethers in high yields without using metal catalysts, specific ligands, and harsh conditions to selectively forge C_sp2-O bonds via the C_sp2-F cleavage. This method can be applied to the late-stage etherification of structurally complex C_sp2-fluorides and bioactive alcs., such as β-estradiol, calciferol, and tocopherol.

Organic Letters 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 C11H22N2O4, Synthetic Route of 91-16-7.

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

Wu, Zhuo published the artcilePd-catalyzed cross-electrophile Coupling/C-H alkylation reaction enabled by a mediator generated via C(sp³)-H activation, SDS of cas: 93-04-9, the publication is Chemical Science (2021), 12(24), 8531-8536, database is CAplus and MEDLINE.

Pd-catalyzed cascade cross-electrophile coupling and C-H alkylation reaction of 2-iodo-alkoxylarenes with alkyl chlorides were reported. Methoxy and benzyloxy groups, which were ubiquitous functional groups and common protecting groups, were utilized as crucial mediators via primary or secondary C(sp³)-H activation. The reaction provided an innovative and convenient access for the synthesis of alkylated phenol derivatives, which were widely found in bioactive compounds and organic functional materials.

Chemical Science published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C8H15ClN2, SDS of cas: 93-04-9.

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

Zeng, Renping published the artcilePreparation and application of microporous carbons as excellent adsorbents for reversible iodine capture and efficient removal of dye, Category: ethers-buliding-blocks, the publication is Diamond and Related Materials (2021), 108718, database is CAplus.

Because of the application of treating hazardous wastes such as organic dyes and radioactive iodine, the porous carbon with high adsorption capacity has been a research hotspot. In this work, by the pyrolysis method with KOH activation, the hypercrosslinked polynaphthalenes were used as carbonaceous precursors to prepare porous carbons, which showed high sp. surface areas between 943.8 and 2754.5 m² g^-1 with high micropore ratios. Notably, the microporous carbonaceous materials showed an excellent iodine capture capacity of 739 wt% and a high adsorption capacity of malachite green with 1194.8 mg g^-1. These porous carbons provided potential applications in environmental remediation as promising adsorbent materials for adsorption of radioactive iodine, and removal of organic pollutants from aqueous solutions

Diamond and Related Materials published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C16H12O, Category: ethers-buliding-blocks.

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