Day: October 10, 2022

Demekhin, Oleg D.; Burov, Oleg N.; Kletskii, Mikhail E.; Lisovin, Anton V.; Kurbatov, Sergey V.; Bereznyak, Elena A.; Trishina, Alena V. published the artcile< New 13-vinyl derivatives of berberine: synthesis and characterization>, Synthetic Route of 10574-69-3, the main research area is electroneutral vinyl berberine preparation antibacterial SAR density functional theory.

The possibility of obtaining electroneutral substituted 13-vinylberberines I [R = H, CH2C(O)CH3; R1 = dicyanomethyl, 1,3-dimethoxy-1,3-dioxopropan-2-yl, 2,4,6-trioxo-1,3-diazinan-5-yl, etc.] was demonstrated exptl. and via quantum-chem. DFT/B3LYP calculations in the 6-31++G(d,p) basis set. The introduction of pharmacophoric fragments conjugated through vinyl moiety opened new possibilities for structural modification of berberine, enabling pronounced changes in tropicity toward supramol. biol. structures. The newly synthesized 13-vinylberberines I were stable in their reduced form due to significant intramol. electron d. transfer from berberine ring system to the vinyl moiety bearing electron-withdrawing groups. It was demonstrated that berberine derivatives I may exist not only in ion pair form consisting of organic cation and inorganic anion, but also as zwitterionic structures featuring significant intramol. charge transfer. The obtained 13-vinylberberines I exhibited biol. activity against the highly pathogenic Vibrio cholerae.

Chemistry of Heterocyclic Compounds (New York, NY, United States)published new progress about Active methylene compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 10574-69-3 belongs to class thiazole, and the molecular formula is C10H9NOS2, Synthetic Route of 10574-69-3.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Pena, Stella; Scarone, Laura; Manta, Eduardo; Stewart, Lindsay; Yardley, Vanessa; Croft, Simon; Serra, Gloria published the artcile< Synthesis of a Microcystis aeruginosa predicted metabolite with antimalarial activity>, Application In Synthesis of 96929-05-4, the main research area is peptidomimetic synthesis Microcystis aeruginosa metabolite antimalarial agent; peptide coupling oxazole thiazole macrocyclization.

The synthesis of a Microcystis aeruginosa predicted metabolite analog of aerucyclamide B was performed. This hexacyclopeptide was obtained from three heterocyclic building blocks by a convergent macrocycle-assembly methodol. The compound exhibited good in vitro antiplasmodial activity (IC50: 0.18μM, K1, chloroquine-resistant strain).

Bioorganic & Medicinal Chemistry Letterspublished new progress about Antimalarials. 96929-05-4 belongs to class thiazole, and the molecular formula is C12H18N2O4S, Application In Synthesis of 96929-05-4.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Yamada, Shinji; Katsumata, Hiroko published the artcile< Asymmetric Acylation of sec-Alcohols with Twisted Amides Possessing Axial Chirality Induced by the Adjacent Asymmetric Center>, HPLC of Formula: 171877-39-7, the main research area is asym acylation secondary alc twisted amide axial chirality; desymmetrization meso diols twisted amide axial chirality.

This paper reports that axially chiral twisted amides serve as asym. acylating agents for sec-alcs. under neutral conditions. Kinetic resolution of various racemic sec-alcs. and desymmetrization of 1,2-, 1,3-, and 1,4-meso-diols were performed by using the twisted amides. The utility of this desymmetrization method was shown by the preparation of the synthetic intermediate for macrolide antibiotic nodusmicin and 18-deoxynargenicin. The stereoselectivity of the acylation reactions is significantly dependent on the bulkiness of both the acyl group and the C-4 substituent of the chiral auxiliary. When an amide possessing an imidazolyl group at C-4 was employed, the stereoselectivity was reversed to give R esters. A possible working model of the acylation reaction is also described on the basis of the structural studies of the twisted amides by IR and 1H and 13C NMR spectroscopies and AM1 calculations These studies suggested a rotamer that is thermodynamically more stable than the others. This rotamer has an axial chirality about its C(O)-N linkage that is induced by the adjacent chiral center. This would enable discrimination of the two enantiomeric hydroxy groups of the racemic alcs. or meso-diols.

Journal of Organic Chemistrypublished new progress about Absolute configuration. 171877-39-7 belongs to class thiazole, and the molecular formula is C10H11NS2, HPLC of Formula: 171877-39-7.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Oishi, Shunsuke; Saito, Susumu published the artcile< Double Molecular Recognition with Aminoorganoboron Complexes: Selective Alcoholysis of β-Dicarbonyl Derivatives>, Reference of 171877-39-7, the main research area is mol recognition aminoorganoboron complex chemoselective regioselective alcoholysis dicarbonyl derivative.

Aminoorganoboron (AOB) complexes recognize alc. and β-dicarbonyl units, and thereby facilitate chemo- and site-selective alcoholysis of the latter. The complex activates both reaction partners. This strategy enables C-C, C-N, and C-O bond cleavage in addition/elimination reactions under near neutral pH conditions and provides a new method for functional group conversions.

Angewandte Chemie, International Editionpublished new progress about 1,3-Dicarbonyl compounds Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 171877-39-7 belongs to class thiazole, and the molecular formula is C10H11NS2, Reference of 171877-39-7.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Chevillard, Florent; Rimmer, Helena; Betti, Cecilia; Pardon, Els; Ballet, Steven; van Hilten, Niek; Steyaert, Jan; Diederich, Wibke E.; Kolb, Peter published the artcile< Binding-Site Compatible Fragment Growing Applied to the Design of β2-Adrenergic Receptor Ligands>, Computed Properties of 198904-53-9, the main research area is beta2 adrenergic receptor ligand fragment based drug design phenylamine.

Fragment-based drug discovery is intimately linked to fragment extension approaches that can be accelerated using software for de novo design. Although computers allow for the facile generation of millions of suggestions, synthetic feasibility is however often neglected. In this study the authors computationally extended, chem. synthesized, and exptl. assayed new ligands for the β2-adrenergic receptor (β2AR) by growing fragment-sized ligands. To address the synthetic tractability issue, the authors’ in silico work-flow aims at derivatized products based on robust organic reactions. The study started from the predicted binding modes of five fragments. The authors suggested a total of eight diverse extensions that were easily synthesized, and further assays showed that four products had an improved affinity (up to 40-fold) compared to their resp. initial fragment. The described work-flow, which the authors call “”growing via merging”” and for which the key tools are available online, can improve early fragment-based drug discovery projects, making it a useful creative tool for medicinal chemists during structure-activity relationship (SAR) studies.

Journal of Medicinal Chemistrypublished new progress about Computer application (PINGUI toolbox web interface). 198904-53-9 belongs to class thiazole, and the molecular formula is C10H7NOS, Computed Properties of 198904-53-9.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Khiat, Manel; Zradni, Fatima-Zohra; Kasmi-Mir, Souad; Baeza, Alejandro published the artcile< Study of the electrochemical behavior of merocyanine and merocarbocyanine salts and their transformation into π-electron donor molecules, namely tetrathiatetraazafulvalenes>, HPLC of Formula: 10574-69-3, the main research area is tetrathiatetraazafulvalene electrochem preparation cyclic voltammetry voltammogram.

An electrochem. study using cyclic voltammetry method was carried out on some previously prepared merocyanines salts, namely thiazolideniumsulfonate salts and thiazolidenium chloride salts I [R = Ph, Bn; R1 = H, SMe; X = Cl, 4-methylbenzenesulfonate] and merocarbocyanines salts, namely alkylidenthiazolidenium sulfonate salt and alkylidenthiazolidenium chloride salt II [R = n-Pr]. These salts were transformed by dimerization in situ in a voltammetric cell into tetrathiatetraazafulvalenes (TTTAFs) such as III supposed to be π-electron donor mols. due to existing conjugation in their structure. The structure of all new chem. synthesized mols. was confirmed by IR, 1H-NMR, 13C-NMR, and MS. The transformation of salts into TTTAF was confirmed by a reversible voltammogram curve and variation of observed potentials.

Indonesian Journal of Chemistrypublished new progress about Charge transfer complexes Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 10574-69-3 belongs to class thiazole, and the molecular formula is C10H9NOS2, HPLC of Formula: 10574-69-3.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Zhou, Jiadi; Wang, Chaodong; Huang, Lei; Luo, Can; Ye, Shilu; Xu, Ning; Zhu, Yunsheng; Liu, Li; Ren, Quanlei; Chen, Zhi; Song, Shengjie; Li, Jianjun published the artcile< Self-photocatalyzed regulable alkylation of 2H-benzothiazoles with diverse aliphatic C-H donors>, COA of Formula: C7H9NO2S, the main research area is benzothiazole alc photochem alkylation; alkyl hydroxy benzothiazole preparation; amide benzothiazole photochem alkylation; amido alkyl benzothiazole preparation; alc benzothiazole photochem alkylation; alkylbenzothiazole preparation.

Here, a mild and efficient method that combines self-photoredox catalysis and hydrogen atom transfer to achieve the alkylation of 2H-benzothiazoles with alcs., ethers, lactams, amides and alkane, which features broad substrate scope and excellent functional group compatibility was reported. Notably, alcs. can be used not only as hydroxyalkylating reagents, but also as dehydroxyalkylating reagents in this regulable alkylation protocol. The previous elusive self-photocatalytic mechanism was investigated and preliminary results on this catalytic alkylation were reported.

Green Chemistrypublished new progress about Alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 20582-55-2 belongs to class thiazole, and the molecular formula is C7H9NO2S, COA of Formula: C7H9NO2S.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Ospanov, Meirambek; Sulochana, Suresh P.; Paris, Jason J.; Rimoldi, John M.; Ashpole, Nicole; Walker, Larry; Ross, Samir A.; Shilabin, Abbas G.; Ibrahim, Mohamed A. published the artcile< Identification of an Orally Bioavailable, Brain-Penetrant Compound with Selectivity for the Cannabinoid Type 2 Receptor>, Application of C4H3NOS, the main research area is pyrrolobenzodiazepine preparation neuroinflammation cannabinoid receptor antineurodegenerative activity pharmacokinetic property; cannabinoid receptors CB1/CB2; central nervous system (CNS); neurodegenerative diseases; neuroinflammation; pharmacokinetics (PK); pyrrolobenzodiazepines; radioligand binding assay.

Modulation of the endocannabinoid system (ECS) is of great interest for its therapeutic relevance in several pathophysiol. processes. The CB2 subtype is largely localized to immune effectors, including microglia within the central nervous system, where it promotes anti-inflammation. Recently, a rational drug design toward precise modulation of the CB2 active site revealed the novelty of Pyrrolo[2,1-c][1,4]benzodiazepines tricyclic chemotype with a high conformational similarity in comparison to the existing leads. These compounds are structurally unique, confirming their chemotype novelty. In our continuing search for new chemotypes as selective CB2 regulatory mols., following SAR approaches, a total of 17 selected (S,E)-11-[2-(arylmethylene)hydrazono]-PBD analogs were synthesized and tested for their ability to bind to the CB1 and CB2 receptor orthosteric sites. A competitive [3H]CP-55,940 binding screen revealed five compounds that exhibited >60% displacement at 10 μM concentration Further concentration-response anal. revealed two compounds, 4k and 4q, as potent and selective CB2 ligands with sub-micromolar activities (Ki = 146 nM and 137 nM, resp.). In order to support the potential efficacy and safety of the analogs, the oral and i.v. pharmacokinetic properties of compound 4k were sought. Compound 4k was orally bioavailable, reaching maximum brain concentrations of 602 ± 162 ng/g (p.o.) with an elimination half-life of 22.9 ± 3.73 h. Whether administered via the oral or i.v. route, the elimination half-lives ranged between 9.3 and 16.7 h in the liver and kidneys. These compounds represent novel chemotypes, which can be further optimized for improved affinity and selectivity toward the CB2 receptor.

Moleculespublished new progress about Anti-neurodegenerative agents. 1003-32-3 belongs to class thiazole, and the molecular formula is C4H3NOS, Application of C4H3NOS.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Yevtodiyenko, Aleksey; Bazhin, Arkadiy; Khodakivskyi, Pavlo; Godinat, Aurelien; Budin, Ghyslain; Maric, Tamara; Pietramaggiori, Giorgio; Scherer, Sandra S.; Kunchulia, Marina; Eppeldauer, George; Polyakov, Sergey V.; Francis, Kevin P.; Bryan, Jeffrey N.; Goun, Elena A. published the artcile< Portable bioluminescent platform for in vivo monitoring of biological processes in non-transgenic animals>, Name: (S)-2-(6-Hydroxybenzo[d]thiazol-2-yl)-4,5-dihydrothiazole-4-carboxylic acid, the main research area is bioluminescent transgenic animal biol process invivo monitoring.

Bioluminescent imaging (BLI) is one of the most powerful and widely used preclin. imaging modalities. However, the current technol. relies on the use of transgenic luciferase-expressing cells and animals and therefore can only be applied to a limited number of existing animal models of human disease. Here, we report the development of a “”portable bioluminescent”” (PBL) technol. that overcomes most of the major limitations of traditional BLI. We demonstrate that the PBL method is capable of noninvasive measuring the activity of both extracellular (e.g., dipeptidyl peptidase 4) and intracellular (e.g., cytochrome P 450) enzymes in vivo in non-luciferase-expressing mice. Moreover, we successfully utilize PBL technol. in dogs and human cadaver, paving the way for the translation of functional BLI to the noninvasive quantification of biol. processes in large animals. The PBL methodol. can be easily adapted for the noninvasive monitoring of a plethora of diseases across multiple species.

Nature Communicationspublished new progress about Animal gene, CYP3A Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 2591-17-5 belongs to class thiazole, and the molecular formula is C11H8N2O3S2, Name: (S)-2-(6-Hydroxybenzo[d]thiazol-2-yl)-4,5-dihydrothiazole-4-carboxylic acid.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Martin-Burgos, Blanca; Wang, Wanqi; William, Ivana; Tir, Selma; Mohammad, Innus; Javed, Reja; Smith, Stormi; Cui, Yilin; Arzavala, Jessica; Mora, Dalilah; Smith, Ciearra B.; van der Vinne, Vincent; Molyneux, Penny C.; Miller, Stephen C.; Weaver, David R.; Leise, Tanya L.; Harrington, Mary E. published the artcile< Methods for detecting PER2:LUCIFERASE bioluminescence rhythms in freely moving mice>, Quality Control of 2591-17-5, the main research area is circadian rhythm bioluminescence gene expression photomultiplier tube; CycLuc1; PERIOD2; bioluminescence; circadian; in vivo; luciferase; peripheral oscillators; reporter gene.

Circadian rhythms are driven by daily oscillations of gene expression. An important tool for studying cellular and tissue circadian rhythms is the use of a gene reporter, such as bioluminescence from the reporter gene luciferase controlled by a rhythmically expressed gene of interest. Here we describe methods that allow measurement of circadian bioluminescence from a freely moving mouse housed in a standard cage. Using a LumiCycle In Vivo (Actimetrics), we determined conditions that allow detection of circadian rhythms of bioluminescence from the PER2 reporter, PER2::LUC, in freely behaving mice. The LumiCycle In Vivo applies a background subtraction that corrects for effects of room temperature on photomultiplier tube (PMT) output. We tested delivery of d-luciferin via a s.c. minipump and in the drinking water. We demonstrate spikes in bioluminescence associated with drinking bouts. Further, we demonstrate that a synthetic luciferase substrate, CycLuc1, can support circadian rhythms of bioluminescence, even when delivered at a lower concentration than d-luciferin, and can support longer-term studies. A small difference in phase of the PER2::LUC bioluminescence rhythms, with females phase leading males, can be detected with this technique. We share our anal. scripts and suggestions for further improvements in this method. This approach will be straightforward to apply to mice with tissue-specific reporters, allowing insights into responses of specific peripheral clocks to perturbations such as environmental or pharmacol. manipulations.

Journal of Biological Rhythmspublished new progress about Biological oscillations. 2591-17-5 belongs to class thiazole, and the molecular formula is C11H8N2O3S2, Quality Control of 2591-17-5.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica