Month: November 2022

Hutt, Johnathon T. published the artcileSynthesis of 2,3-dihydrobenzofurans via the palladium catalyzed carboalkoxylation of 2-allylphenols, Computed Properties of 1160556-64-8, the publication is Organic Chemistry Frontiers (2016), 3(10), 1314-1318, database is CAplus and MEDLINE.

A new Pd-catalyzed alkene carboalkoxylation strategy for the preparation of 2,3-dihydrobenzofurans, e.g., I was described. This method effects the coupling of readily available 2-allylphenol derivatives with aryl triflates to generate a wide range of functionalized 2,3-dihydrobenzofurans in good yields and diastereoselectivities (up to > 20:1). Use of newly developed reaction conditions that promote anti-heteropalladation of the alkene was essential in order to generate products in high yield.

Organic Chemistry Frontiers published new progress about 1160556-64-8. 1160556-64-8 belongs to quinuclidine, auxiliary class Mono-phosphine Ligands, name is 2′-(Dicyclohexylphosphino)-N2,N2,N6,N6-tetramethyl-[1,1′-biphenyl]-2,6-diamine, and the molecular formula is C28H41N2P, Computed Properties of 1160556-64-8.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Mishra, Jitendra K. published the artcileStudies toward a Library of Tetrahydrofurans: Click and MCR Products of Mono- And Bis-Tetrahydrofurans, Recommanded Product: 4-Cyclohexylbenzoic acid, the publication is Journal of Combinatorial Chemistry (2010), 12(5), 609-612, database is CAplus and MEDLINE.

The synthesis of tetrahydrofuran-based hybrid mols. using the Sharpless azide-alkyne Click reaction and the Ugi and Biginelli multicomponent reactions as key transformations is presented. Numerous mono- and bis-tetrahydrofuran triazoles, peptides, and acyclic and cyclic urea derivatives with diverse structural features, e.g. I and II, were prepared in fair to good yields from the readily available mono- and bis-tetrahydrofuranyl azides and amines.

Journal of Combinatorial Chemistry published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Recommanded Product: 4-Cyclohexylbenzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Ai, Teng published the artcile5-((3-Amidobenzyl)oxy)nicotinamides as Sirtuin 2 Inhibitors, Computed Properties of 20029-52-1, the publication is Journal of Medicinal Chemistry (2016), 59(7), 2928-2941, database is CAplus and MEDLINE.

Derived from the previously reported human sirtuin 2 (SIRT2) inhibitors that were based on a 5-aminonaphthalen-1-yloxy nicotinamide core structure, 5-((3-amidobenzyl)oxy)nicotinamides offered excellent activity against SIRT2 and high isoenzyme selectivity over SIRT1 and SIRT3. Selected compounds also exhibited generally favorable in vitro absorption, distribution, metabolism, and excretion properties. Kinetic studies revealed that a representative SIRT2 inhibitor acted competitively against both NAD⁺ and the peptide substrate, an inhibitory modality that was supported by the computational study. More importantly, two selected compounds I and II exhibited significant protection against α-synuclein aggregation-induced cytotoxicity in SH-SY5Y cells. Therefore, 5-((3-amidobenzyl)oxy)nicotinamides represent a new class of SIRT2 inhibitors that are attractive candidates for further lead optimization in the continued effort to explore selective inhibition of SIRT2 as a potential therapy for Parkinson’s disease.

Journal of Medicinal Chemistry published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Computed Properties of 20029-52-1.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Shaw, Subrata published the artcileAsymmetric Catalysis with Iron-Salen Complexes, Safety of 2-(1-(Mercaptomethyl)cyclopropyl)acetic acid, the publication is Synthesis (2016), 48(17), 2768-2780, database is CAplus.

Iron(III)-salen complexes based on a chiral cis-2,5-diaminobicyclo[2.2.2]octane scaffold are used as catalysts for a variety of stereoselective reactions. High enantio- and diastereoselectivities can be achieved with these catalysts in sulfa-Michael conjugate addition to acyclic α,β-unsaturated ketones, in regioselective δ-addition of thiols to acyclic α,β,γ,δ-unsaturated ketones, and in Conia-ene carbocyclization of alkynyl-substituted β-dicarbonyl compounds The use of these chiral iron-salen complexes as catalysts provides a new method for conducting these three important reactions under environmentally sustainable conditions.

Synthesis published new progress about 162515-68-6. 162515-68-6 belongs to quinuclidine, auxiliary class Thiol,Carboxylic acid,Aliphatic cyclic hydrocarbon, name is 2-(1-(Mercaptomethyl)cyclopropyl)acetic acid, and the molecular formula is C39H35N5O8, Safety of 2-(1-(Mercaptomethyl)cyclopropyl)acetic acid.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Wolfgang, Josh D. published the artcileNon-isocyanate Polyurethanes from 1,1′-Carbonyldiimidazole: A Polycondensation Approach, COA of Formula: C13H26N2, the publication is Macromolecular Rapid Communications (2021), 42(13), 2100163, database is CAplus and MEDLINE.

1,1′-Carbonyldiimidazole (CDI) provides a platform to generate high mol. weight polyurethanes from industrially relevant diols and diamines. CDI, which is described in the literature for its use in amidation and functionalization reactions, enables the production of well-defined and stable polyurethane precursors, thus eliminating the need for isocyanates. Herein, the functionalization of 1,4-butanediol with CDI yields an electrophilic biscarbamate, bis-carbonylimidazolide (BCI), which is suitable for further step-growth polymerization in the presence of amines. Elevated reaction temperatures enable the solvent-, catalyst-, and isocyanate-free polycondensation reaction between the BCI monomer and various diamines. The thermoplastic polyurethanes produced from this reaction demonstrate high thermal stability, tunable glass transition temperatures based on incorporation of flexible polyether segments, and mech. ductile thin films. CDI functionalized diols will allow the preparation of diverse polyurethanes without the use of isocyanate-containing monomers.

Macromolecular Rapid Communications published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C10H12O5, COA of Formula: C13H26N2.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Liu, Xin published the artcileIndirect reduction of CO₂ and recycling of polymers by manganese-catalyzed transfer hydrogenation of amides, carbamates, urea derivatives and polyurethanes, Application of 4,4-Diaminodicyclohexyl methane, the publication is Chemical Science (2021), 12(31), 10590-10597, database is CAplus and MEDLINE.

A manganese pincer complex as a versatile catalyst for the transfer hydrogenation of amides, carbamates, urea derivatives and even polyurethanes leading to the corresponding alcs., amines and methanol as products were reported. Since these compound classes can be prepared using CO₂ as a C1 building block the reported reaction represents an approach to the indirect reduction of CO₂. Notably, these are the first examples on the reduction of carbamates and urea derivatives as well as on the C-N bond cleavage in amides by transfer hydrogenation. The general applicability of this methodol. is highlighted by the successful reduction of 12 urea derivatives, 26 carbamates and 11 amides. The corresponding amines, alcs. and methanol were obtained in good to excellent yields up to 97%. Furthermore, polyurethanes were successfully converted which represents a viable strategy towards a circular economy. Based on control experiments and the observed intermediates a feasible mechanism was proposed.

Chemical Science published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Application of 4,4-Diaminodicyclohexyl methane.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Rajagopalan, Narayanan published the artcileDegradation mechanisms of amine-cured epoxy novolac and bisphenol F resins under conditions of high pressures and high temperatures, Quality Control of 1761-71-3, the publication is Progress in Organic Coatings (2021), 106268, database is CAplus.

Projections of continued growth in the global hydrocarbon demand and fast depleting resources push the oil and gas industry to explore and produce in geol. formations with abnormal high pressures and temperatures, so-called HPHT conditions. In the present study, the largely unexplored degradation mechanisms for amine-cured epoxy novolac (EN) and bisphenol F (BPF) epoxy resins are investigated at lower limits of HPHT. Using a batch-like reactor encompassing the three relevant phases (a gas mixture of nitrogen and carbon dioxide, a hydrocarbon phase of aromatic para-xylene, and an artificial seawater phase), the conditions of high pressures and high temperatures were simulated. The EN and BPF coated steel panels were placed inside the batch reactor. In the gas phase-exposed zone, both EN and BPF remained essentially intact with no major defects. However, due to para-xylene uptake that resulted in a free volume increase (i.e. lowering of the glass transition temperature), the hydrocarbon-exposed zones of EN and BPF were partly covered by an oxide of iron, the origin of which was found to be diffusion of anodically-dissolved iron from the steel-coating interface. The enhanced resin chain mobility at the hydrocarbon-seawater interphase allowed higher rates of diffusion of seawater ions to the steel-coating interface with clear signs of coating degradation Finally, the seawater phase induced small blisters in the EN coating, whereas for BPF, a complete loss of adhesion between the coating and the substrate was observed Simulation of Rapid Gas Decompression (RGD), uncovered the role of RGD in the iron oxide formation process for both EN and BPF coatings. In summary, when compared to BPF, the EN network showed superior performance under conditions of HPHT.

Progress in Organic Coatings published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C13H26N2, Quality Control of 1761-71-3.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Yang, Xiu published the artcileEnhanced reflection chiroptical effect of planar anisotropic chiral metamaterials placed on the interface of two media, Related Products of quinuclidine, the publication is Chinese Physics B (2020), 29(10), 107303, database is CAplus.

The strong chiroptical effect is highly desirable and has a wide range of applications in biosensing, chiral catalysis, polarization tuning, and chiral photo detection. In this work, we find a simple method to enhance the reflection CD (CDR) by placing the planar anisotropic chiral metamaterials (i.e., Z-shaped PACMs) on the interface of two media (i.e., Z-PCMI) with a large refractive index difference. The maximum reflection CDR from the complex system can reach about 0.840 when the refractive index is set as ntop = 4.0 and nbottom = 1.49, which is approx. three times larger than that of placing the Z-shaped PACMs directly on the substrate (i.e., Z-PCMS). While the min. reflection CDR is 0.157 when the refractive index is set as ntop = 1.0 and nbottom = 1.49. So we can get a large available range of reflection CDR from -0.840 to -0.157. Meanwhile, the transmission CDT remains unchanged with the refractive index ntop increment. Our in-depth research indicates that the large reflection CDR is derived from the difference of non-conversion components of the planar anisotropic chiral metamaterials’ reflection matrixes. In short, we provide a simple and practical method to enhance the chiroptical effect by changing the refractive index difference between two media without having to design a complex chiral structure.

Chinese Physics B published new progress about 1761-71-3. 1761-71-3 belongs to quinuclidine, auxiliary class Ploymers, name is 4,4-Diaminodicyclohexyl methane, and the molecular formula is C10H14N2O, Related Products of quinuclidine.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Tian, Zong-Qiang published the artcilePotent Cytotoxic C-11 Modified Geldanamycin Analogues, Synthetic Route of 795299-77-3, the publication is Journal of Medicinal Chemistry (2009), 52(10), 3265-3273, database is CAplus and MEDLINE.

17-Allylamino-17-demethoxygeldanamycin (17-AAG) inhibits the activity of Hsp90, an important target for treatment of cancers. In an effort to identify analogs of geldanamycin (GDM) with properties superior to those of 17-AAG, we synthesized C-11 modified derivatives of GDM including ethers, esters, carbazates, ketones, and oximes, and measured their affinity for Hsp90 and their ability to inhibit growth of human cancer cells. In accordance with crystal structures reported for complexes of GDMs with Hsp90, bulky groups attached to C-11 interfered with Hsp90 binding while smaller groups such as 11-O-Me allowed Hsp90 binding. In addition, these analogs also showed in vitro cytotoxicity against human cancer cell lines. Esterfication of the 11-OH of 17-AAG eliminated Hsp90 binding in vitro. The readily hydrolyzed esters acted as prodrugs during the measurement of cytotoxicity. Thus, during these experiments, the esters were hydrolyzed, releasing 17-AAG. Several 11-O-methyl-17-alkylaminogeldanamycin analogs were identified with improved potency relative to 17-AAG.

Journal of Medicinal Chemistry published new progress about 795299-77-3. 795299-77-3 belongs to quinuclidine, auxiliary class Azetidine,Amine, name is 2-(Azetidin-1-yl)ethanamine, and the molecular formula is C8H16O2, Synthetic Route of 795299-77-3.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider

Jia, Li published the artcileSynthesis and antibacterial evaluation of novel 11-O-aralkylcarbamoyl-3-O-descladinosylclarithromycin derivatives, Application In Synthesis of 20029-52-1, the publication is Bioorganic & Medicinal Chemistry Letters (2018), 28(14), 2471-2476, database is CAplus and MEDLINE.

A series of novel 11-O-aralkylcarbamoyl-3-O-descladinosylclarithromycin derivatives were designed, synthesized and evaluated for their in vitro antibacterial activity. The results showed that the majority of the target compounds displayed potent activity against erythromycin-susceptible S. pyogenes, erythromycin-resistant S. pneumoniae A22072 expressing the mef gene and S. pneumoniae AB11 expressing the mef and erm genes. Besides, most of the target compounds exhibited moderate activity against erythromycin-susceptible S. aureus ATCC25923 and B. subtilis ATCC9372. Title compounds exert favorable antibacterial activity against erythromycin-susceptible S. pyogenes with the MIC values of 0.015-0.125 μg/mL. Furthermore, title compounds showed superior activity against erythromycin-resistant S. pneumoniae A22072 with the MIC values of 0.25-0.5 μg/mL. Addnl., compound c was the most effective against all the erythromycin-resistant S. pneumoniae strains (A22072, B1 and AB11), exhibiting 8-, 8- and 32-fold more potent activity than clarithromycin, resp.

Bioorganic & Medicinal Chemistry Letters published new progress about 20029-52-1. 20029-52-1 belongs to quinuclidine, auxiliary class Carboxylic acid,Benzene, name is 4-Cyclohexylbenzoic acid, and the molecular formula is C13H16O2, Application In Synthesis of 20029-52-1.

Referemce:
https://en.wikipedia.org/wiki/Quinuclidine,
Quinuclidine | C7H13N | ChemSpider