Tag: M.W=200-250

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

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

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

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

Liu, Yingchun published the artcileVertically aligned dopamine-reduced graphene oxide with high thermal conductivity for epoxy nanocomposites, Category: quinuclidine, the publication is Journal of Materials Science (2020), 55(21), 8917-8929, database is CAplus.

Designing ordered fillers arrangement and superior interfacial adhesion between fillers and matrix can improve the thermal conductivity (TC) of composites. Here, bioinspired dopamine chem. was firstly used to reduce graphene oxide (GO) and introduce polydopamine nanoparticles on the surface of GO. Then, a well-aligned epoxy/reduced GO films (EP/RGFs) nanocomposites were prepared via the simple vacuum impregnation. Compared with the random distribution of fillers in a traditional blending composite, fillers were selectively distributed in matrix and continuous thermal conductive network structures were constructed in this strategy. As a result, the nanocomposite exhibited a high TC of 0.913 W m^-1 K^-1 which is 4.8 times higher than pure EP. In addition, curing kinetics showed that RGFs were similar to an amine-type curing agent that reacted with EP and bonded them tightly, and its nanocomposites reaction activation energy is lower than that of pure EP. These results indicated RGFs possessed excellent interface compatibility with EP and suppressing effectively the phonon scattering at the EP-RGFs interface. Cooling experiments showed that nanocomposites can reduce by about 10°C for a hot source (80°C), demonstrating it can transfer efficiently heat energy from the heat source. This study provides an effective method for the preparation of high-performance thermal management composites.

Journal of Materials 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, Category: quinuclidine.

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

Liang, Xiao published the artcileCopper/Palladium Bimetallic System for the Synthesis of Isobenzofuranones through [4 + 1] Annulation between Propiophenones and Benzoic Acids, HPLC of Formula: 20029-52-1, the publication is Organic Letters (2020), 22(24), 9568-9573, database is CAplus and MEDLINE.

A copper/palladium-catalyzed annulation from benzoic acids and propiophenones for the synthesis of isobenzofuranones was reported. The Cu-(2,2,6,6-tetramethylpiperidin-1-yl)oxyl system showed a great ability to activate the C-H bond on the α- and β-carbons of a carbonyl group, and the in situ-generated enone intermediate in this reaction could be further transformed to construct isobenzofuranones with the catalysis of Pd(dba)₂ (dba = dibenzylideneacetone). Various isobenzofuranones could be obtained in moderate to good yields, and a great atom economy was highlighted by utilizing this method.

Organic 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, HPLC of Formula: 20029-52-1.

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

Ke, Li-na published the artcileInhibitory effects of benzoic acid and its derivatives on the polyphenoloxidase from the 5^th instar of Pieris rapae L., Recommanded Product: 4-Cyclohexylbenzoic acid, the publication is Xiamen Daxue Xuebao, Ziran Kexueban (2004), 43(6), 856-860, database is CAplus.

The polyphenoloxidase (PPO) is more responsible for enzymic browning during the growth of the insects. It also is involved in the defense reaction and has some certain relation with the immune condition of the insects. The polyphenoloxidase is a metalloenzyme oxidase which catalyzes two distinct reactions of melanin synthesis the hydroxylation of a monophenol and the oxidation of ωmi-diphenol to the corresponding ωmi-quinone. A great number of benzoic acid family compounds can inhibit the enzyme activity for the oxidation of L-DOPA. In the present paper, partial characteristics and inhibitory kinetics of polyphenoloxidase (PPO) from the 5^th instar of Pieris rapae L. were studied. The results show that benzoic acid, p-cyanobenzoic acid, p-hydroxybenzoic acid and p-cyclohexylbenzoic acid were chosen as inhibitors of PPO for the oxidation of L-DOPA. The reactions of these inhibitors with the PPO are reversible with remaining enzyme activity. The IC₅₀ (the inhibitor concentrations leading to 50% activity lost) were estimated to be 14.2, 16.1, 11.3 and 2.1 mmol/L, resp. The inhibitory mechanisms of p-hydroxybenzoic acid is competitive, p-cyanobenzoic acid belongs to be a mixed typed inhibitor while the others are noncompetitive inhibitors. Obviously, p-cyanobenzoic acid is the best inhibitor among the four compounds, so it may have the bright prospect in the future as the biocide.

Xiamen Daxue Xuebao, Ziran Kexueban 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

Costanzo, Michael J. published the artcilePotent, nonpeptide inhibitors of human mast cell tryptase. Investigation of the carboxamide portion of spirocyclic piperidine amides, Quality Control of 20029-52-1, the publication is Letters in Drug Design & Discovery (2008), 5(2), 116-121, database is CAplus.

The authors have explored a series of spirocyclic piperidine amide derivatives with respect to the N-acyl portion (viz. 6) for inhibition of tryptase. Thus, the authors identified analogs (I and II) as potent tryptase inhibitors (IC₅₀ < 10 nM) with excellent selectivity vs. trypsin. Four other interesting compounds in this chem. series had IC₅₀ = 10-20 nM. X-ray cocrystal structures of tryptase complexes with spirocyclic piperidine amides are reported.

Letters in Drug Design & Discovery 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, Quality Control of 20029-52-1.

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

Chaudhari, Chandan published the artcileOne-pot synthesis of cyclohexylamine and N-aryl pyrroles via hydrogenation of nitroarenes over the Pd_0.5Ru_0.5-PVP catalyst, Category: quinuclidine, the publication is New Journal of Chemistry (2021), 45(22), 9743-9746, database is CAplus.

The direct synthesis of cyclohexylamine via the hydrogenation of nitrobenzene over monometallic (Pd, Ru or Rh) and bimetallic (Pd_xRu_1-x) catalysts was studied. The Pd_0.5Ru_0.5-PVP catalyst was the most effective catalyst for this reaction. The catalyst can be reused and applied for the synthesis of N-aryl pyrroles I (R = Ph, 4-chlorophenyl, pyridin-3-yl, etc.) and quinoxalines such as 2,3-diphenylquinoxaline and 2,3-diphenyl-1,2,3,4-tetrahydroquinoxaline from nitrobenzenes RNO₂.

New Journal of Chemistry 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, Category: quinuclidine.

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

Quattropani, Anna published the artcilePharmacophore-Based Design of Novel Oxadiazoles as Selective Sphingosine-1-phosphate (S1P) Receptor Agonists with in vivo Efficacy, Recommanded Product: 4-Cyclohexylbenzoic acid, the publication is ChemMedChem (2015), 10(4), 688-714, database is CAplus and MEDLINE.

Sphingosine-1-phosphate (S1P) receptor agonists have shown promise as therapeutic agents for multiple sclerosis (MS) due to their regulatory roles within the immune, central nervous system, and cardiovascular system. Here, the design and optimization of novel [1,2,4]oxadiazole derivatives as selective S1P receptor agonists are described. The structure-activity relation exploration was carried out on the three dominant segments of the series: modification of the polar head group (P), replacement of the oxadiazole linker (L) with different five-membered heterocycles, and the use of diverse 2,2′-disubstituted biphenyl moieties as the hydrophobic tail (H). All three segments have a significant impact on potency, S1P receptor subtype selectivity, physicochem. properties, and in vitro absorption, distribution, metabolism, excretion and toxicity (ADMET) profile of the compounds From these optimization studies, a selective S1P₁ agonist, N-methyl-N-(4-{5-[2-methyl-2′-(trifluoromethyl)biphenyl-4-yl]-1,2,4-oxadiazol-3-yl}benzyl)glycine (45), and a dual S1P_1,5 agonist, N-methyl-N-(3-{5-[2′-methyl-2-(trifluoromethyl)biphenyl-4-yl]-1,2,4-oxadiazol-3-yl}benzyl)glycine (49), emerged as frontrunners. These compounds distribute predominantly in lymph nodes and brain over plasma and induce long lasting decreases in lymphocyte count after oral administration. When evaluated head-to-head in an exptl. autoimmune encephalomyelitis mouse model, together with the marketed drug fingolimod, a pan-S1P receptor agonist, S1P_1,5 agonist 49 demonstrated comparable efficacy while S1P₁-selective agonist 45 was less potent. Compound 49 is not a prodrug, and its improved property profile should translate into a safer treatment of relapsing forms of MS.

ChemMedChem 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