Tag: M.W:200-300

Application of 1416134-49-0. 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: (2S,5R)-5-((Benzyloxy)amino)piperidine-2-carboxamide, is researched, Molecular C13H19N3O2, CAS is 1416134-49-0, about Use of Lipase Catalytic Resolution in the Preparation of Ethyl (2S,5R)-5-((Benzyloxy)amino)piperidine-2-carboxylate, a Key Intermediate of the β-Lactamase Inhibitor Avibactam. Author is Wang, Tao; Du, Liang-Dong; Wan, Ding-jian; Li, Xiang; Chen, Xin-Zhi; Wu, Guo-Feng.

Here we describe an efficient and cost-effective chemoenzymic synthesis of the β-lactamase inhibitor avibactam starting from com. available Et 5-hydroxypicolinate hydrochloride. Avibactam was synthesized in 10 steps with an overall yield of 23.9%. The synthetic route features a novel lipase-catalyzed resolution step during the preparation of (2S,5S)-Et 5-hydroxypiperidine-2-carboxylate, a valuable precursor of the key intermediate Et (2S,5R)-5-((benzyloxy)amino)piperidine-2-carboxylate. Our synthetic route was used to produce 400 g of avibactam sodium salt.

In some applications, this compound(1416134-49-0)Application of 1416134-49-0 is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Formula: C15H11NO. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 2,5-Diphenyloxazole, is researched, Molecular C15H11NO, CAS is 92-71-7, about Effects of small-molecule-doping on spin-assisted processes in P3DDT:PC61BM photovoltaics. Author is Krinichnyi, V. I.; Yudanova, E. I.; Denisov, N. N.; Bogatyrenko, V. R..

The effect of the 1,2-benzopyrone (BP) and 2,5-diphenyloxazole (PPO, DPO) additives on the formation, separation, motion, and recombination of charge carriers in the poly(3-dodecylthiophene):[6,6]-phenyl-C61-butanoic acid Me ester (P3DDT:PC61BM) organic photovoltaics was investigated by the light-induced ESR (LEPR) and NIR-Vis-UV spectroscopy within the wide temperature and photon energy range. These processes were interpreted in the framework of the exchange interaction of spin ensembles differently distributed in bulk heterojunctions of the P3DDT:PC61BM composite. The concentration, composition, and dynamics of spin charge carriers were shown to be determined by the modification degree of the sample with small mols., the energy of the light photons as well as the number, spatial distribution and energetic depth of spin traps formed in the disordered polymer matrix. Electronic functionality of the composite becomes better after its doping with BP and PPO additives up to optimal weight levels of 0.03 and 0.06, resp. Such modification can improve the morphol./ordering of the composite that increases the number of highly mobile charge carriers due to the release of a part of carriers captured by energetically deep spin traps. This increases an exchange interaction between spin ensembles, reduces the number and depth of electron spin traps that, in turn, prevents the recombination of charge carriers and accelerates the power conversion.

In some applications, this compound(92-71-7)Formula: C15H11NO is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis and evaluation of trypanocidal activity of derivatives of naturally occurring 2,5-diphenyloxazoles, published in 2021-07-15, which mentions a compound: 92-71-7, mainly applied to 2,5-Diphenyloxazole; Natural product; Trypanocidal activity; Trypanosoma congolense; Trypanosomiasis, Application In Synthesis of 2,5-Diphenyloxazole.

African trypanosomiasis is a zoonotic protozoan disease affecting the nervous system. Various natural products reportedly exhibit trypanocidal activity. Naturally occurring 2,5-diphenyloxazoles present in Oxytropis lanata, and their derivatives, were synthesized. The trypanocidal activities of the synthesized compounds were evaluated against Trypanosoma brucei brucei, T. b. gambiense, T. b. rhodesiense, T. congolense, and T. evansi. Natural product 1 exhibited trypanocidal activity against all the species/subspecies of trypanosomes, exhibiting half-maximal inhibitory concentrations (IC50) of 1.1-13.5 μM. Modification of the oxazole core improved the trypanocidal activity. The 1,3,4-oxadiazole (7) and 2,4-diphenyloxazole (9) analogs exhibited potency superior to that of 1. However, these compounds exhibited cytotoxicity in Madin-Darby bovine kidney cells. The O-methylated analog of 1 (12) was non-cytotoxic and exhibited selective trypanocidal activity against T. congolense (IC50 = 0.78 μM). Structure-activity relationship studies of the 2,5-diphenyloxazole analogs revealed aspects of the mol. structure critical for maintaining selective trypanocidal activity against T. congolense.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2,5-Diphenyloxazole( cas:92-71-7 ) is researched.Quality Control of 2,5-Diphenyloxazole.He, Yuan; Liao, Xian-Zhang; Dong, Lin; Chen, Fen-Er published the article 《Rh(III)-Catalyzed three-component cascade annulation to produce the N-oxopropyl chain of isoquinolone derivatives》 about this compound( cas:92-71-7 ) in Organic & Biomolecular Chemistry. Keywords: oxazole internal alkyne water rhodium three component tandem heterocyclization; oxoalkyl isoquinolone preparation regioselective. Let’s learn more about this compound (cas:92-71-7).

A novel three-component cascade annulation reaction to efficiently construct the N-oxopropyl chain of isoquinolone derivatives via rhodium(III)-catalyzed C-H activation/cyclization/nucleophilic attack was reported with oxazoles used both as the directing group and potential functionalized reagents.

In some applications, this compound(92-71-7)Quality Control of 2,5-Diphenyloxazole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Rajakrishna, Kalvala; Dhanasekaran, A.; Yuvaraj, N.; Ajoy, K. C.; Venkatraman, B.; Jose, M. T. published the article 《Improvement in plastic scintillator with loading of BaFBr:Eu2+ radioluminescence phosphor》. Keywords: barium bromide fluoride europium radioluminescence phosphor plastic scintillator.They researched the compound: 2,5-Diphenyloxazole( cas:92-71-7 ).Synthetic Route of C15H11NO. 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:92-71-7) here.

This article describes a new concept of developing a composite plastic scintillator (PS) with better light out and detection efficiency of ionizing radiations by loading high Zeff radioluminescence (RL) phosphor powder. Gamma-ray interaction in PSs has been enhanced due to increased photoelec. absorption in the loaded BaFBr:Eu2+ phosphor powder. RL BaFBr:Eu2+ powder has been synthesized by a high-temperature solidstate diffusion method in reducing atm. Polystyrenebased PS sheets of 250±50μm thickness have been prepared with 2.5-di-Ph oxazole (PPO) and 1.4-bis(5-phenyl-2-oxazolyl) benzene (POPOP) as primary and secondary fluors, resp., mixed with the synthesized phosphor powder in different weight percentages. Radiation detection properties of the composite PS have been studied for alpha, beta, neutron, and gamma radiations of different energies. The composite PS sheet loaded with 20 wt% of phosphor powder showed maximum intensity for RL and photoluminescence (PL). Studies also confirmed a significant increase in the radiation detection efficiency in composite PS for various energies of beta and gamma rays. The lifetime measurement of the composite PS showed same nanosecond lifetime which is appropriate for fast counting and matches closely with the PS without loading. Pulse height anal. for various ionizing radiations of different energies confirmed significant improvement in the detection efficiency of loaded PSs.

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

Category: thiazole. 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: 2,5-Diphenyloxazole, is researched, Molecular C15H11NO, CAS is 92-71-7, about Comparison of lignans and phenolic acids in different varieties of germinated flaxseed (Linum usitatissimum L.). Author is Wu, Yixin; Wang, Hong; Wang, Yufu; Brennan, Charles Stephen; Anne Brennan, Margaret; Qiu, Caisheng; Guo, Xinbo.

Summary : The study aimed to evaluate the biosynthesis and accumulation of lignans, phenolic acids and also the antioxidant activities in 15 varieties of flax sprouts. The differential contents of lignans (13.30-8987μg g-1) and phenolic acids (72.55-597.1μg g-1) among 15 varieties of flax sprouts were observed The total antioxidant activities ranged from 147.2 to 332.8μmol TE g-1 in the flax sprouts. The expression levels of five genes in the lignin synthetic pathway were analyzed using RT-qPCR, and the results showed dramatical differences among different flax sprouts. Relatively dispersed anal. was showed by principal component anal. (PCA), and 15 flax sprouts were grouped by hierarchical cluster anal. (HCA) based on their phenolic acids, lignan compounds, length, gene expression and antioxidants after germination, primarily in relation to variety specificity. Present results would be instructive guidance for bio-fortification breeding and functional foods innovation in flaxseeds.

In some applications, this compound(92-71-7)Category: thiazole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Category: thiazole. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2,5-Diphenyloxazole, is researched, Molecular C15H11NO, CAS is 92-71-7, about Discovery of Key TIPS-Naphthalene for Efficient Visible-to-UV Photon Upconversion under Sunlight and Room Light**. Author is Harada, Naoyuki; Sasaki, Yoichi; Hosoyamada, Masanori; Kimizuka, Nobuo; Yanai, Nobuhiro.

While many studies have been done on triplet-triplet annihilation-based photon upconversion (TTA-UC) to produce visible light with high efficiency, the efficient TTA-UC from visible to UV light, despite its importance for a variety of solar and indoor applications, remains a challenging task. Here, we report the highest visible-to-UV TTA-UC efficiency of 20.5 % based on the discovery of an excellent UV emitter, 1,4-bis((triisopropylsilyl)ethynyl)naphthalene (TIPS-Nph). TIPS-Nph is an acceptor with desirable features of high fluorescence quantum yield and high singlet generation efficiency by TTA. TIPS-Nph has a low enough triplet energy level to be sensitized by Ir(C6)2(acac), a superior donor that does not quench UV emission. The combination of TIPS-Nph and Ir(C6)2(acac) realizes the efficient UV light production even with weak light sources such as an AM 1.5 solar simulator and room LEDs.

In some applications, this compound(92-71-7)Category: thiazole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Boc-D-Prolinol( cas:83435-58-9 ) is researched.Reference of Boc-D-Prolinol.Arnold, Kenny; Batsanov, Andrei S.; Davies, Bryan; Grosjean, Christophe; Schuetz, Thorben; Whiting, Andrew; Zawatzky, Kerstin published the article 《The first example of enamine-Lewis acid cooperative bifunctional catalysis: application to the asymmetric Aldol reaction》 about this compound( cas:83435-58-9 ) in Chemical Communications (Cambridge, United Kingdom). Keywords: pyrrolidine butoxycarbonyl derivative sparteine lithiation pinacol chloromethylboronate alkylation deprotection; homoboroproline bifunctional enamine Lewis acid catalyst preparation crystal structure; nitrobenzaldehyde acetone tartrate ester homoboroproline catalyst Aldol addition; Aldol adduct stereoselective preparation. Let’s learn more about this compound (cas:83435-58-9).

(-)-Sparteine directed lithiation of N-Boc-pyrrolidine, alkylation with chloromethylboronate pinacol ester and acid-based deprotection provides homoboroproline I HX salt in 94% ee. Salts of I are shown to be efficient enamine-type pyrrolidine catalysts in an asym. aldol reaction when neutralized, and especially when esterified in situ with a tartrate ester, for example, providing 90% ee of the aldol adduct derived from acetone and p-nitrobenzaldehyde.

In some applications, this compound(83435-58-9)Reference of Boc-D-Prolinol is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Quality Control of 2,5-Diphenyloxazole. 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: 2,5-Diphenyloxazole, is researched, Molecular C15H11NO, CAS is 92-71-7, about Effects of small-molecule-doping on spin-assisted processes in P3DDT:PC61BM photovoltaics. Author is Krinichnyi, V. I.; Yudanova, E. I.; Denisov, N. N.; Bogatyrenko, V. R..

The effect of the 1,2-benzopyrone (BP) and 2,5-diphenyloxazole (PPO, DPO) additives on the formation, separation, motion, and recombination of charge carriers in the poly(3-dodecylthiophene):[6,6]-phenyl-C61-butanoic acid Me ester (P3DDT:PC61BM) organic photovoltaics was investigated by the light-induced ESR (LEPR) and NIR-Vis-UV spectroscopy within the wide temperature and photon energy range. These processes were interpreted in the framework of the exchange interaction of spin ensembles differently distributed in bulk heterojunctions of the P3DDT:PC61BM composite. The concentration, composition, and dynamics of spin charge carriers were shown to be determined by the modification degree of the sample with small mols., the energy of the light photons as well as the number, spatial distribution and energetic depth of spin traps formed in the disordered polymer matrix. Electronic functionality of the composite becomes better after its doping with BP and PPO additives up to optimal weight levels of 0.03 and 0.06, resp. Such modification can improve the morphol./ordering of the composite that increases the number of highly mobile charge carriers due to the release of a part of carriers captured by energetically deep spin traps. This increases an exchange interaction between spin ensembles, reduces the number and depth of electron spin traps that, in turn, prevents the recombination of charge carriers and accelerates the power conversion.

In some applications, this compound(92-71-7)Quality Control of 2,5-Diphenyloxazole is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2,5-Diphenyloxazole, is researched, Molecular C15H11NO, CAS is 92-71-7, about Characterization of water-based liquid scintillator for Cherenkov and scintillation separation.Formula: C15H11NO.

This paper presents measurements of the scintillation light yield and time profile of a number of concentrations of water-based liquid scintillator, formulated from linear alkylbenzene (LAB) and 2,5-Diphenyloxazole (PPO). The separation between Cherenkov and scintillation light is quantified using cosmic muons in the CHESS experiment for each formulation, and we discuss the prospects for largescale detectors.

In some applications, this compound(92-71-7)Formula: C15H11NO is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

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