Category: ethers-buliding-blocks

Hlouskova, Zuzana published the artcileStructural elaboration of dicyanopyrazine: towards push-pull molecules with tailored photoredox activity, COA of Formula: C11H17BO3S, the publication is RSC Advances (2019), 9(41), 23797-23809, database is CAplus and MEDLINE.

As an extension of the successful dicyanopyrazine photoredox catalysts, a series of X-shaped push-pull mols. with a systematically altered structure I [R¹ = SMe, CN, 2-thienyl, etc.; R² = OMe, CN, 2-thienylsulfanyl, etc.; R³ = SMe, CN, 2-thienylsulfanyl, etc.] were designed and facilely synthesized and their structure-property relationship was elucidated in detail via exptl. as well as theor. calculations Dicyanopyrazines I were proven to be powerful photoredox catalysts with a push-pull arrangement that allowed facile property tuning by interchanging a particular part of the D-π-A system. Changing the mutual position of the cyano acceptors and the methoxy, methylthio and thienyl donors as well as modifying the linker allowed wide tuning of the fundamental properties of the catalysts. Contrary to the currently available organic photoredox catalysts, a series of catalysts based on a pyrazine heterocyclic scaffold with easy synthesis and further modification, diverse photoredox characteristics and wide application potential across modern photoredox transformations was provided . The photoredox catalytic activities of the target catalysts were examined in a benchmark cross-dehydrogenative coupling and novel and challenging annulation reactions.

RSC Advances published new progress about 596819-12-4. 596819-12-4 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic acid and ester, name is 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C11H17BO3S, COA of Formula: C11H17BO3S.

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

Kulhanek, Jiri published the artcileQuadrupolar fluorophores with tetrafluorobenzene central electron acceptor, COA of Formula: C11H17BO3S, the publication is Journal of Fluorine Chemistry (2021), 109735, database is CAplus.

Seven novel quadrupolar chromophores based on 1,2,4,5-tetrafluorobenzene (TFB) central electron acceptor unit and methoxythiophene peripheral donor were synthesized and described. Fundamental structure-property relationships were elucidated via thermal, electrochem. and optical measurements. These revealed that the properties are mostly affected by the used π-linker. Variation of the π-linker resulted in tuning of the HOMO-LUMO gap. The LUMO clearly reflects planarity, polarizability and electronic transparency of the utilized π-linker. The absorption maxima of target chromophores were found within the range of 346-412 nm and the emission maxima of emissive derivatives were found within the range of 411-499 nm. Novel TFBs were compared with TFBs previously described in the literature. The exptl. data are further corroborated by theor. calculations

Journal of Fluorine Chemistry published new progress about 596819-12-4. 596819-12-4 belongs to ethers-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Ether,Boronate Esters,Boronic acid and ester, name is 2-(5-Methoxythiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C11H17BO3S, COA of Formula: C11H17BO3S.

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

Chichibabin, A. E. published the artcileAction of aldehydes on α-aminopyridine and on α-dimethylaminopyridine, Related Products of ethers-buliding-blocks, the publication is Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen (1931), 2839-42, database is CAplus.

In the action of HCHO on α-aminopyridine (1), 2 reactions take place simultaneously, condensation to a dipyridyl derivative and methylation of the amino group, the end product being p,p’-tetra methyldiaminodipyridylmethane (C. A. 24, 1642). It seemed of interest to study the behavior of other aldehydes toward I under these conditions. With aromatic aldehydes in HCO₂H there is no condensation, only a reaction analogous to the above methylation but differing from it in that only 1 H atom of the amino group seems to be replaced by the aromatic residue because the primarily formed Schiff base is at once reduced; secondary amines can be obtained in excellent yield by this method. The o-substituted derivatives of BzH studied (o-NO₂, o-HO) do not react with I under these conditions. BzH, heated with α-C₅H₄NNMe₂ (II) and ZnCL₂, reacts like BzH with PhNMe₂, giving phenylbis(α-dimethylaminopyridyl)methane (III), which is oxidized by PbO₂ in acid solution to the carbinol (IV). α-Benzylaminopyridine, m. 94°, is obtained in 90% yield from I in anhydrous HCO₂H refluxed with BzH. α-(p-Methoxybenzylamino)pyridine, from I and anisaldehyde (80-5% yield), m. 128°. α-(3,4-Methylenedioxybenzylamino)-pyridine (70%), m. 99-100°. α-Formylaminopyridine, from equimol. amounts of I and anhydrous HCO₂H carefully heated in a Claisen flask until the formation of water ceased, b₁₅161-2°, m. 71°. III (6 g. from 10 g. II), m. 130-1°, soluble in H₂SO₄ without color. IV, yellowish, m. 123-4°, soluble in concentrated H₂SO₄ with blood-red and in HCl with deep red color, water destroying the color, which, however, is restored by concentrated acids, although the simple salts cannot be obtained in colored form.

Berichte der Deutschen Chemischen Gesellschaft [Abteilung] B: Abhandlungen published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C13H14N2O, Related Products of ethers-buliding-blocks.

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

Denmark, Scott E. published the artcileTotal synthesis of (+)-papulacandin D, Name: (+)-B-Methoxydiisopinocampheylborane, the publication is Tetrahedron (2010), 66(26), 4745-4759, database is CAplus and MEDLINE.

A total synthesis of (+)-papulacandin D (I) was achieved in 31 steps, in a 9.2% overall yield from com. available materials. The synthetic strategy divided the mol. into two nearly equal sized subunits, i.e. the spirocyclic C-arylglycopyranoside and the polyunsaturated fatty acid side-chain. The C-arylglycopyranoside was prepared in 11 steps in a 30% overall yield from triacetoxyglucal. The fatty acid side-chain was also prepared in 11 steps in a 30% overall yield from geraniol. The key strategic transformations in the synthesis were a palladium-catalyzed organosilanolate-based cross-coupling reaction of a dimethylglucal-silanol with an electron-rich and sterically hindered aromatic iodide and a Lewis-base catalyzed enantioselective allylation reaction of a dienal and allyltrichlorosilane. A critical element in the successful execution of the synthesis was the development of a suitable protecting group strategy that satisfied a number of stringent criteria.

Tetrahedron 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, Name: (+)-B-Methoxydiisopinocampheylborane.

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

Tan, Choon-Hong published the artcileStereochemical assignment of the C21-C38 portion of the desertomycin/oasomycin class of natural products by using universal NMR databases: Proof, Quality Control of 99438-28-5, the publication is Angewandte Chemie, International Edition (2000), 39(23), 4282-4284, database is CAplus and MEDLINE.

We have predicted the stereochem. of the C21-C38 portion of the desertomycin/oasomycin class of natural products and have proven the predicted stereochem. by a stereoselective synthesis of the C21-C38 degradation product.

Angewandte Chemie, International Edition 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 C5H4N4, Quality Control of 99438-28-5.

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

Varga, Janos M. published the artcileMechanism of allergic cross-reactions. I. Multispecific binding of ligands to a mouse monoclonal anti-DNP IgE antibody, Quality Control of 637-58-1, the publication is Molecular Immunology (1991), 28(6), 641-54, database is CAplus and MEDLINE.

A recently developed solid-phase binding assay was used to investigate the specificity of ligand binding to a mouse monoclonal anti-dinitrophenyl IgE (I). All DNP-amino acids, that were tested inhibited the binding of the radio-labeled I to DNP covalently attached to polystyrene microplates; however, the concentration for 50% inhibition varied within four orders of magnitude, DNP-L-serine being the most and DNP-L-proline the least potent inhibitor. In addition to DNP analogs, a large number of drugs and other compounds were tested for their ability to compete with DNP for the binding site of I. At the concentration used for screening, 59% of compounds had no significant inhibition; 19% inhibited the binding of I more than 50%. Several families of compounds (tetracyclines, polymyxins, phenothiazines, salicylates, and quinones) that were effective competitors were found. Within these families, changes in the functional groups attached to the family stem had major effects on the affinity of ligand binding. The occurrence frequencies of interactions of ligands with I is in good agreement with the semi-empirical model for multispecific antibody-ligand interactions.

Molecular Immunology 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 C7H13ClNNaO5S, Quality Control of 637-58-1.

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

Yamaguchi, Akitake published the artcileConformationally stable peptide macrocycles assembled using the Petasis borono-Mannich reaction, SDS of cas: 77128-73-5, the publication is Chemical Communications (Cambridge, United Kingdom) (2019), 55(71), 10567-10570, database is CAplus and MEDLINE.

Macrocyclization of linear peptide precursors using the Petasis borono-Mannich reaction affords a diverse range of macrocycles with an endocyclic amine. Anal. of the corresponding macrocyclic structures underscores that the hydrogen bond between an endocyclic amine and the adjacent amide NH is a powerful control element for conformationally homogeneous peptide macrocycles.

Chemical Communications (Cambridge, United Kingdom) 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 C9H11BO4, SDS of cas: 77128-73-5.

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

Schneider, Anselm F. L. published the artcileDiscovery, X-ray structure and CPP-conjugation enabled uptake of p53/MDM2 macrocyclic peptide inhibitors, Application In Synthesis of 77128-73-5, the publication is RSC Chemical Biology (2021), 2(6), 1661-1668, database is CAplus and MEDLINE.

Mouse double minute 2 homolog (MDM2, Hdm2) is an important neg. regulator of the tumor suppressor p53. Using a mRNA based display technique to screen a library of >10¹² in vitro-translated cyclic peptides, we have identified a macrocyclic ligand that shows picomolar potency on MDM2. X-Ray crystallog. reveals a novel binding mode utilizing a unique pharmacophore to occupy the Phe/Trp/Leu pockets on MDM2. Conjugation of a cyclic cell-penetrating peptide (cCPP) to the initially non cell-permeable ligand enables cellular uptake and a pharmacodynamic response in SJSA-1 cells. The demonstrated enhanced intracellular availability of cyclic peptides that are identified by a display technol. exemplifies a process for the application of intracellular tools for drug discovery projects.

RSC Chemical Biology 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 In Synthesis of 77128-73-5.

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

Shahar, Or David published the artcileA high-throughput chemical screen with FDA approved drugs reveals that the antihypertensive drug Spironolactone impairs cancer cell survival by inhibiting homology directed repair, Name: 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, the publication is Nucleic Acids Research (2014), 42(9), 5689-5701, database is CAplus and MEDLINE.

DNA double-strand breaks (DSBs) are the most severe type of DNA damage. DSBs are repaired by non-homologous end-joining or homol. directed repair (HDR). Identifying novel small mols. that affect HDR is of great importance both for research use and therapy. Mols. that elevate HDR may improve gene targeting, whereas inhibiting mols. can be used for chemotherapy, since some of the cancers are more sensitive to repair impairment. Here, the authors performed a high-throughput chem. screen for FDA approved drugs, which affect HDR in cancer cells. The authors found that HDR frequencies are increased by retinoic acid and Idoxuridine and reduced by the antihypertensive drug Spironolactone. The authors further revealed that Spironolactone impairs Rad51 foci formation, sensitizes cancer cells to DNA damaging agents, to Poly (ADP-ribose) polymerase (PARP) inhibitors and crosslinking agents and inhibits tumor growth in xenografts, in mice. This study suggests Spironolactone as a new candidate for chemotherapy.

Nucleic Acids Research 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 C18H12ClNO, Name: 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride.

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

Seong, Chaehyeon published the artcileTotal Synthesis of 1-Oxomiltirone and Arucadiol, COA of Formula: C10H14O, the publication is Synlett (2020), 31(19), 1953-1956, database is CAplus.

A practical and efficient approach for the total synthesis of arucadiol (I) and 1-oxomiltirone (II) is reported. The key step, which involves an intramol. [4+2] cycloaddition catalyzed by gold(III) bromide or copper(II) triflate, leads to the formation of 6-6-6-fused aromatic abietane core.

Synlett 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 C6H10F3NO, COA of Formula: C10H14O.

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