Month: April 2022

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 7-Chloro-4-(piperazin-1-yl)quinoline, is researched, Molecular C13H14ClN3, CAS is 837-52-5, about Synthesis, antituberculosis studies and biological evaluation of new quinoline derivatives carrying 1,2,4-oxadiazole moiety, the main research direction is oxadiazolylmethylpiperazinyl quinoline derivative preparation antituberculosis; Antitubercular activity; Bioavailability; Cytotoxicity; Oxadiazole; Quinoline.Reference of 7-Chloro-4-(piperazin-1-yl)quinoline.

Tuberculosis is the infectious disease caused by mycobacterium tuberculosis (Mtb), responsible for the utmost number of deaths annually across the world. Herein, twenty-one new substituted 1,2,4-oxadiazol-3-ylmethyl-piperazin-1-yl-quinoline derivatives were designed and synthesized through multistep synthesis followed by in vitro evaluation of their antitubercular potential against Mtb WT H37Rv. The compound I was found to be promising with MIC value of 0.5 μg/mL and QD-19 to QD-21 were also remarkable with MIC value of 0.25 μg/mL. Addnl., we have carried out experiments to confirm the metabolic stability, cytotoxicity and pharmacokinetics of these compounds along with kill kinetics of QD-18. These compounds were found to be orally bioavailable and highly effective. Altogether, these results indicate that I and II (R = 2,3-Me2Ph, cyclopentyl, and 4-iPrPh) are promising lead compounds for the development of a novel chem. class of antitubercular drugs.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

SDS of cas: 286014-53-7. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,3-Dimesityl-1H-imidazol-3-ium tetrafluoroborate, is researched, Molecular C21H25BF4N2, CAS is 286014-53-7, about [Pd(NHC)(allyl)Cl] Complexes: Synthesis and Determination of the NHC Percent Buried Volume (%Vbur) Steric Parameter. Author is Clavier, Herve; Correa, Andrea; Cavallo, Luigi; Escudero-Adan, Eduardo C.; Benet-Buchholz, Jordi; Slawin, Alexandra M. Z.; Nolan, Steven P..

Complexes of Pd bearing NHC ligands (NHC = N-heterocyclic carbene) were synthesized and fully characterized. The [Pd(NHC)(allyl)Cl] series was obtained by simple cleavage of [Pd(allyl)Cl]2 by using either the isolated free NHC or the in situ generated NHC. The NHC ligand sterics were varied by introduction of groups attached to the C4-C5 C atoms of the NHC backbone. Results of the x-ray diffraction study permitted determination of the NHC steric parameters within this series. The NHC backbone induces variations in its percent buried volume (%Vbur) as a function of the N-substituents (© Wiley-VCH Verlag GmbH and Co. KGaA, 69451 Weinheim, Germany, 2009).

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Muncipinto, Giovanni; Moquist, Philip N.; Schreiber, Stuart L.; Schaus, Scott E. published an article about the compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol( cas:119707-74-3,SMILESS:OC1=C(Br)C=C2C=CC=CC2=C1C3=C4C=CC=CC4=CC(Br)=C3O ).COA of Formula: C20H12Br2O2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:119707-74-3) through the article.

The first diastereoselective Petasis reaction catalyzed by chiral biphenols that enables the synthesis of syn and anti β-amino alcs. in pure form has been developed. The reaction exploits a multicomponent approach that involves boronates, α-hydroxy aldehydes, and amines: R1CH(OH)CHO + R2R3NH + R4B(OEt)2 → R1CH(OH)CH(NR2R3)R4.

Compound(119707-74-3)COA of Formula: C20H12Br2O2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound((S)-3,3′-Dibromo-1,1′-bi-2-naphthol), if you are interested, you can check out my other related articles.

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Shi, Xiaolin; Li, Xiaowei; Ma, Lina; Shi, Dayong published an article about the compound: 6-Bromo-3-methyl-1H-indole( cas:1219741-50-0,SMILESS:CC1=CNC2=C1C=CC(Br)=C2 ).Application of 1219741-50-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1219741-50-0) through the article.

An efficient copper-catalyzed oxidative trifluoromethylation of indoles I (R1 = H, Boc, Bn, Bz; R2 = Me, cyclohexyl, CH2C(O)CH3, CH2CN, etc.; R3 = H, 4-F, 5-MeO, 6-Cl, 7-Br, etc.) with low-cost CF3SO2Na via C-H activation has been described. Notably, the use of a base is crucial for the trifluoromethylation of indoles I. This reaction proceeds efficiently in good to excellent yields and is tolerance of a broad range of functional groups. Furthermore, melatonin, a medicine for sleep disorders, is converted to its 2-CF3 analog in 68% yield. Studies of possible reaction pathways suggest that this reaction proceeds through a radical process.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Radl, Stanislav; Blahovcova, Michaela; Tkadlecova, Marcela; Havlicek, Jaroslav published the article 《Synthetic studies connected with the preparation of N-[3-(3-cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethylacetamide, a zaleplon regioisomer》. Keywords: chloropyrazolopyrimidincarbonitrile boronate Suzuki Miyaura coupling; zaleplon regioisomer preparation.They researched the compound: Ethyl 3-Ethoxy-2-Propenoate( cas:1001-26-9 ).Related Products of 1001-26-9. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1001-26-9) here.

N-[3-(3-Cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethylacetamide, a principal impurity of zaleplon, was prepared by Suzuki-Miyaura cross-coupling of appropriate boronates with 5-chloropyrazolo[1,5-a]pyrimidin-3-carbonitrile. Various methods of preparation of both components were described, as well as approaches based on the final modification of the 5-(3-aminophenyl)pyrazolo[1,5-a]pyrimidine-3-carbonitrile moiety prepared by Suzuki-Miyaura cross-coupling. All the prepared compounds were unambiguously identified by NMR. IR, UV, and mass spectra of these compounds were also given.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Methyl β-(m-chloroanilino)acrylate》. Authors are Gray, F. W.; Mosher, Harry S.; Whitmore, F. C.; Oakwood, T. S..The article about the compound:Ethyl 3-Ethoxy-2-Propenoatecas:1001-26-9,SMILESS:O=C(OCC)/C=C/OCC).COA of Formula: C7H12O3. Through the article, more information about this compound (cas:1001-26-9) is conveyed.

HCCCO2Me (9.5 g.) and 9.0 g. m-ClC6H4NH2 (I) stirred 70 hrs. at 25-30°, and the mixture chilled and filtered yielded 11.2 g. Me β-(m-chloroanilino)acrylate (II), colorless needles from MeOH, m. 148-50° (m.p. greatly dependent on rate of heating), cyclized to 4-hydroxy-7-chloroquinoline (IIA) (Price, et al. (C.A. 40, 5741.1)). I.HCl (19.8 g.) in 150 cc. water at 10° treated with 17.7 g. (MeO)2CHCH2CO2Me, and the mixture warmed to 25° after 15 min. and stirred overnight yielded 24 g. material (III), m. 123-6° (from MeOH), analyzing correctly for II, but attempted cyclization by heating 2 g. with Ph2O gave only a small amount (0.15 g.) of 1,3-bis(m-chlorophenylurea) (IV), m. 248°. I (5.1 g.) and 4.5 g. MeOCH:CHCO2Me heated 1 hr. at 100° and 740 mm., then 1 hr. at 50° and 15 mm., the solution added dropwise to 150 cc. boiling Ph2O, the mixture refluxed 1 hr., cooled, left at room temperature 4 hrs., and filtered yielded 2 g. IV, white, crystalline needles from MeOH, m. 250°. EtOCH:CHCO2Et (7.6 g.) and 6.8 g. I yielded 1.3 g. IV, m. 250°. This method for preparing IIA offers another method for synthesizing antimalarials of the chloroquine type.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Synthetic Route of C10H8N2S2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 4,4-Dipyridyl Disulfide, is researched, Molecular C10H8N2S2, CAS is 2645-22-9, about Crystal structures and magnetic properties of two Co(II) coordination polymers created via in situ ligand synthesis. Author is Zhao, Ying; Dang, Li-Long; Zhai, Zhi-Min; Ma, Lu-Fang; Wang, Li-Ya.

The authors present two new coordination polymers, [Co3(iBuOIPA)3(bps)(H2O)]n (1) and [Co2(iPrIPA)2(bps)]n (2) (bps = 4,4′-bipyridyl sulfide, iBuOIPA = 5-i-butoxyisophthalate, iPrIPA = 5-i-propoxyisophthalate), by the hydrothermal reactions of Co(OAc)2·4H2O and 4,4′-bipyridyl disulfide (bpds) with iBuOIPA or iPrIPA, resp. Both crystal structures were determined by single-crystal x-ray diffraction analyses and further characterized by elemental analyses, IR spectra and TG analyses. For 1 and 2, the starting bpds ligands were wholly transformed into bps. Polymer 1 displays a 3-dimensional network constructed from binuclear Co nodes while polymer 2 features a 2-dimensional infinite layer consisting of Co dimers. The existence of electron-donating groups in isophthalate derivatives plays a significant role during the self-assembly of polymers. Also, both 1 and 2 exhibit remarkable magnetic properties, which were studied and discussed in detail, showing a good prospect in magnetic and energy storage devices.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Du, Haifeng; Zhang, Xue; Wang, Zheng; Ding, Kuiling published an article about the compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol( cas:119707-74-3,SMILESS:OC1=C(Br)C=C2C=CC=CC2=C1C3=C4C=CC=CC4=CC(Br)=C3O ).Electric Literature of C20H12Br2O2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:119707-74-3) through the article.

This paper describes the successful development of a series of chiral zinc catalysts containing (R)-3,3′-Br2-BINOL ligand and various diimine activators for enantioselective HDA reaction of Danishefsky’s diene with aldehydes through a combinatorial approach, affording the corresponding 2,3-dihydro-4H-pyran-4-one derivatives in excellent yields and enantioselectivities. The application of this type of catalysis was also extended to the diethylzinc addition to the benzaldehyde, affording the corresponding secondary alc. with up to 94.5% ee under optimized conditions. On the basis of these facts, the integration of two distinct enantioselective reactions, HDA and diethylzinc addition reactions, has been realized in one-pot with the promotion of a single chiral zinc catalyst in a sequential manner. The impact of diimine additive on the catalytic system of HDA reaction was also investigated by probing the nonlinear effect of reaction system. The pos. nonlinear effect exhibited in the catalytic system could be attributed to the poor solubility of the heterochiral zinc species. On the basis of various exptl. findings disclosed in this research, a possible mechanism for the asym. induction in the 3,3′-Br2-BINOL/Zn/diimine catalyzed enantioselective HDA reaction of Danishefsky’s diene with aldehydes was outlined.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Formula: C20H12Br2O2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, is researched, Molecular C20H12Br2O2, CAS is 119707-74-3, about Chiral amino alcohols via catalytic enantioselective Petasis borono-Mannich reactions. Author is Kavouris, John A.; Kavouris, Kathryn E.; Wambua, Victor; Demerzhan, Roman; Moquist, Philip N.; Vetticatt, Mathew J.; Schaus, Scott E..

Chiral amino alcs. are valuable building blocks in the synthesis of drugs, natural products, and chiral ligands used in enantioselective catalysis. The Petasis borono-Mannich reaction is a multicomponent condensation reaction of aldehydes, amines, and boronic acids to afford chiral amines. This report describes a practical, easily scaled, enantioselective Petasis borono-Mannich reaction of glycolaldehyde, with primary or secondary amines, and boronates catalyzed by BINOL-derived catalysts to afford chiral 1,2-amino alcs. in high yields and enantioselectivities. The reactions are executed at room temperature in ethanol or trifluorotoluene using com. available reagents and leverage an inherently attractive feature of the multicomponent reaction; the ability to use amines and boronates that possess a wide range of structural and electronic properties. Computational modeling of the diastereomeric transition states using DFT calculations identified a non-conventional CH···O interaction as a key feature that selectively stabilizes the transition state leading to the major enantiomer. The enantioselective catalytic reaction exemplifies a truly practical multicomponent condensation to afford 1,2-amino alcs. in highly enantioenriched form.

From this literature《Chiral amino alcohols via catalytic enantioselective Petasis borono-Mannich reactions》,we know some information about this compound(119707-74-3)Formula: C20H12Br2O2, but this is not all information, there are many literatures related to this compound(119707-74-3).

Reference:
Bromide – Wikipedia,
bromide – Wiktionary

Quality Control of (S)-3,3′-Dibromo-1,1′-bi-2-naphthol. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: (S)-3,3′-Dibromo-1,1′-bi-2-naphthol, is researched, Molecular C20H12Br2O2, CAS is 119707-74-3, about Catalytic Asymmetric Intramolecular Hydroacylation with Rhodium/Phosphoramidite-Alkene Ligand Complexes. Author is Hoffman, Thomas J.; Carreira, Erick M..

An asym. intramol. Rh-catalyzed hydroacylation reaction of pent-4-enals for the preparation of functionalized cyclopentanones in good yield and high enantioselectivity is described (I → II; R = e.g., alkyl, aryl). This process uses rhodium complexes featuring novel modular phosphoramidite-alkene ligands and achiral phosphine coligands.

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Reference:
Bromide – Wikipedia,
bromide – Wiktionary