Category: 71989-31-6

Verdoliva, Valentina published the artcileZeolites employed as basic catalyst for nucleophilic substitution reactions: An analysis of the adopted approach and hypothesized new perspectives, Application of Fmoc-Pro-OH, the publication is Inorganica Chimica Acta (2021), 120630, database is CAplus.

The present article reports on an excursus of substitution reactions performed on different halo-compounds and several cyclic sulfamidates that are readily accessible to nucleophilic attack. Essentially, a cysteine sulfhydryl group is employed as nucleophile and the process is promoted by the basic sites of activated Zeolites A (4 ? mol. sieves). The catalysis occurs on the external surface of the zeolite, as also assessed by the FT-IR anal. executed on mols. adsorbed on the catalyst. The moderate basicity of the zeolite lattice surface is the prerequisite for conducting chemoselective and in some case stereoselective peptide modifications. The developed methodol. allows an efficient one-pot introduction of exogenous moieties into peptides, useful for developing peptidomimetic and/or peptide-based probes.

Inorganica Chimica Acta published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C18H10, Application of Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Garrigou, Michael published the artcileAccelerated Identification of Cell Active KRAS Inhibitory Macrocyclic Peptides using Mixture Libraries and Automated Ligand Identification System (ALIS) Technology, Safety of Fmoc-Pro-OH, the publication is Journal of Medicinal Chemistry (2022), 65(13), 8961-8974, database is CAplus and MEDLINE.

Macrocyclic peptides can disrupt previously intractable protein-protein interactions (PPIs) relevant to oncol. targets such as KRAS. Early hits often lack cellular activity and require meticulous improvement of affinity, permeability, and metabolic stability to become viable leads. We have validated the use of the Automated Ligand Identification System (ALIS) to screen oncogenic KRAS^G12D (GDP) against mass-encoded mini-libraries of macrocyclic peptides and accelerate our structure-activity relationship (SAR) exploration. These mixture libraries were generated by premixing various unnatural amino acids without the need for the laborious purification of individual peptides. The affinity ranking of the peptide sequences provided SAR-rich data sets that led to the selection of novel potency-enhancing substitutions in our subsequent designs. Addnl. stability and permeability optimization resulted in the identification of peptide 7 (I) that inhibited pERK activity in a pancreatic cancer cell line. More broadly, this methodol. offers an efficient alternative to accelerate the fastidious hit-to-lead optimization of PPI peptide inhibitors.

Journal of Medicinal Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Safety of Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Duggan, Nisharnthi M. published the artcileTotal synthesis of the spider-venom peptide Hi1a, Name: Fmoc-Pro-OH, the publication is Organic Letters (2021), 23(21), 8375-8379, database is CAplus and MEDLINE.

Hi1a is a venom peptide from the Australian funnel-web spider Hadronyche infensa with a complex tertiary structure. Hi1a has neuroprotective and cardioprotective properties due to its potent inhibition of acid-sensing ion channel 1a (ASIC1a) and is currently being pursued as a novel therapy for acute ischemic events. Herein, we describe the total synthesis of Hi1a using native chem. ligation. The synthetic peptide was successfully folded and exhibited similar inhibitory activity on ASIC1a to recombinant Hi1a.

Organic Letters published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Name: Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Souto, Jose A. published the artcileSynthetic studies on alotamide A: construction of N-demethylalotamide A, SDS of cas: 71989-31-6, the publication is European Journal of Organic Chemistry (2021), 2021(44), 6057-6070, database is CAplus.

Several approaches to the synthesis of cyclodepsipeptide natural product alotamide A are described, eventually affording a very advanced N-demethylated analog of the targeted natural product. The difficulties found in our endeavors on the synthesis of alotamide A have allowed us to gather some valuable information regarding the most convenient synthetic step for each key transformation. The intramol. Csp²-Csp² Stille cross-coupling and the macrolactam formation were found to be reliable protocols for the final construction of the alotamide A skeleton.

European Journal of Organic Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C15H14N2, SDS of cas: 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Posada, Laura published the artcileCyclopeptides Natural Products as Herbicides and Inhibitors of Cyanobacteria: Synthesis of Versicotides E and F, Application of Fmoc-Pro-OH, the publication is ChemistrySelect (2022), 7(27), e202201956, database is CAplus.

The first total synthesis of cyclopeptides versicotide E and F, natural products produced by marine fungus Aspergillus versicolor LZD-14-1, was achieved in good yield by solid phase peptide synthesis (SPPS) of their linear precursors and solution phase cyclization. All the versicotides A-F were evaluated as herbicides and inhibitors of cyanobacterial growth. Versicotides A, B, D, E and F showed a significant inhibition of Rye grass seed¡äs radicle growth at a concentration of 67 ¦Ìg/mL. Versicotides A, B and D also inhibited seed germination and leaf development. On the other hand, Versicotides D and F caused a relevant reduction on Microcystis aeruginosa population when cultures on exponential growth were incubated with 40 ¦Ìg/mL solutions of these compounds Evaluation of the concentration of microcystins after these treatments showed that versicotide D inhibited the production of microcystins in a comparable extent to the pos. control, colistine. These results indicate versicotides, with versicotides D and F as top hits, could be considered as lead candidates in the development of bioherbicides able to mitigate the environmental impact that the evolution of agriculture has had on water quality.

ChemistrySelect published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Application of Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Yu-Lei published the artcileComparison of different strategies towards the chemical synthesis of long-chain scorpion toxin AaH-II, Recommanded Product: Fmoc-Pro-OH, the publication is Journal of Peptide Science (2022), 28(2), e3365, database is CAplus and MEDLINE.

Long-chain scorpion toxin AaH-II isolated from Androctonus australis Hector can selectively inhibit mammalian voltage-gated sodium ion channel Na_v1.7 responsible for pain sensation. Efficient chem. synthesis of AaH-II and its derivatives is beneficial to the study of the function and mechanism of Na_v1.7 and the development of potential peptide inhibitors. Herein, we compared three different strategies, namely, direct solid-phase peptide synthesis, hydrazide-based two-segment native chem. ligation, and hydrazide-based three-segment native chem. ligation for the synthesis of AaH-II. The hydrazide-based two-segment native chem. ligation affords the target toxin with the optimal efficiency, which provides a practically robust procedure for the preparation of tool mols. derived from AaH-II to study the biol. functions and modulation of Na_v1.7. Our work highlights the importance of selecting suitable segment condensation approach in the chem. synthesis of protein toxins.

Journal of Peptide Science published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Recommanded Product: Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lalithamba, H. S. published the artcileEfficient Application of Green Synthesized CeO₂ Nanoparticles for the Preparation of Selenoester Derivatives of Protected Amino Acids and Production of Biodiesel from Annona squamosa Oil, Computed Properties of 71989-31-6, the publication is Journal of Electronic Materials (2022), 51(7), 3650-3659, database is CAplus.

Eco-friendly nano-cerium oxide was synthesized via a simple and efficient solution combustion route using novel aqueous Brahma Kamal leaf extract and characterized by several techniques including powder x-ray diffraction, Fourier transform IR spectroscopy, photoluminescence, UV visible spectroscopy, energy-dispersive x-ray diffraction, SEM, and transmission electron microscopy. The nanomaterial exhibited an excellent catalytic activity in the synthesis of selenoesters of amino acids through the reaction of corresponding amino acyl chloride derivatives with the in situ-generated NaHSe, followed by addition of ¦Á-bromo esters. Wide ranges of unsym. selenoester derivatives of amino acids were afforded with good to excellent yields, and the structures were characterized by high-resolution mass spectroscopy, ¹H and ¹³C NMR spectroscopy, and Fourier transform IR spectroscopy techniques. Furthermore, nano-CeO₂ exhibits tremendous catalytic activity in the production of biodiesel from Annona squamosa oil and achieved around 89% biodiesel yield. The biodiesel produced satisfies ASTM standards

Journal of Electronic Materials published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Computed Properties of 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Li, Shasha published the artcileMerging Late-Stage Diversification with Solid-Phase Peptide Synthesis Enabled by High-Throughput On-Resin Reaction Screening, Related Products of catalysis-chemistry, the publication is ACS Catalysis (2022), 12(5), 3201-3210, database is CAplus.

An integrated workflow is described that combines micromole-scale high-throughput experimentation (HTE) reaction screening and solid-phase peptide synthesis (SPPS) to enable rapid synthetic method development for on-resin peptide diversification. Using this new approach, we have identified several sets of robust Suzuki-Miyaura coupling conditions with complementary scope that collectively display broad coverage with respect to both resin-bound peptide substrates containing aryl halide side chains and (hetero)arylboronic acid coupling partners. We have also demonstrated the utility of this integrated SPPS/chem. diversification method by synthesizing a multidimensional library of diverse peptides in high yields.

ACS Catalysis published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Todorov, Petar published the artcileSynthesis and characterization of new 5,5¡ä-dimethyl- and 5,5¡ä-diphenylhydantoin-conjugated hemorphin derivatives designed as potential anticonvulsant agents, Application In Synthesis of 71989-31-6, the publication is New Journal of Chemistry (2022), 46(5), 2198-2217, database is CAplus.

Herein, the synthesis and characterization of some novel N-modified hybrid analogs of hemorphins containing a C-5 substituted hydantoin residue as potential anticonvulsants and for the blockade of sodium channels are presented. Their structure-property relationships are highlighted by electrochem. and Fourier transform IR spectroscopy (FT-IR) anal. methods. The lipophilicity and mol. docking of voltage-gated sodium channels were also determined The new series of 5,5-dimethyl- and 5,5-diphenylhydantoin-conjugated hemorphin derivatives were obtained as C-terminal amides via solid-phase peptide synthesis, an Fmoc-strategy using 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethylaminium tetrafluoroborate (TBTU). The anticonvulsant activity of the hybrid-peptides (0.25, 0.5 and 1 ¦Ìg) was tested by maximal electroshock (MES) and 6 Hz psychomotor seizure tests using male ICR mice. None of the compounds tested showed neurotoxicity in the rotarod test. The reference drug phenytoin was used as a pos. control. The most active compound Ph-5 showed 100% efficacy against the 6 Hz-induced psychomotor seizures at a dose of 1.0 ¦Ìg and tonic seizures in the MES test at a lower dose of 0.5 ¦Ìg. This analog of VV-hemorphin-5 contained a 5,5-diphenylhydantoin residue at the N-terminus and a hydrophobic Val-Val-Tyr-Pro-Trp-Thr-Gln-CONH₂ amino acid sequence of the peptide mol. The quant. data for the 6 Hz test demonstrated that the peptide Ph-5 exhibited a median ED (ED50) value of 0.358 ¦Ìg and PI >13.97, and ED50 of 0.25 ¦Ìg and PI >20.35 in the MES test, resp. Results from the docking study suggest that the neuropeptide Ph-5 is a potent inhibitor of sodium channels, and blockade of voltage-gated sodium channels could be the mechanism of action of the hybrid-peptide derivatives with anticonvulsant activity.

New Journal of Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C7H13NO2, Application In Synthesis of 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Paquette, Andre R. published the artcileRpoN-Based stapled peptides with improved DNA binding suppress Pseudomonas aeruginosa virulence, Application In Synthesis of 71989-31-6, the publication is RSC Medicinal Chemistry (2022), 13(4), 445-455, database is CAplus and MEDLINE.

Stapled peptides have the ability to mimic ¦Á-helixes involved in protein binding and have proved to be effective pharmacol. agents for disrupting protein-protein interactions. DNA-binding proteins such as transcription factors bind their cognate DNA sequences via an ¦Á-helix interacting with the major groove of DNA. We previously developed a stapled peptide based on the bacterial alternative sigma factor RpoN capable of binding the RpoN DNA promoter sequence and inhibiting RpoN-mediated expression in Escherichia coli. We have elucidated a structure-activity relationship for DNA binding by this stapled peptide, improving DNA binding affinity constants in the high nM range. Lead peptides were shown to have low toxicity as determined by their low hemolytic activity at 100 ¦ÌM and were shown to have anti-virulence activity in a Galleria mellonella model of Pseudomonas aeruginosa infection. These findings support further preclin. development of stapled peptides as antivirulence agents targeting P. aeruginosa.

RSC Medicinal Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Application In Synthesis of 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia