Month: February 2022

Song, T; Arseniyadis, S; Cossy, J in [Song, Tao; Arseniyadis, Stellios; Cossy, Janine] PSL Res Univ, CNRS, Inst Chem Biol & Innovat CBI, ESPCI Paris,Lab Chim Organ, 10 Rue Vauquelin, F-75231 Paris 05, France; [Arseniyadis, Stellios] Queen Mary Univ London, Sch Biol & Chem Sci, Mile End Rd, London E1 4NS, England published Asymmetric Synthesis of alpha-Quaternary gamma-Lactams through Palladium-Catalyzed Asymmetric Allylic Alkylation in 2019.0, Cited 70.0. Recommanded Product: Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

The synthesis of chiral unsaturated gamma-lactams is reported featuring a highly enantioselective palladium-catalyzed asymmetric allylic alkylation of alpha,gamma-disubstituted 2-silyloxypyrroles. This method allows a straightforward access to optically active gamma-lactams bearing an alpha-quaternary stereogenic center in high yields (up to 93%), high regioselectivities (up to >20:1), and excellent enantioselectivities (up to 95% ee). To further demonstrate the synthetic utility of the method, the resulting allylated products were converted to various versatile chiral building blocks, such as pyrrolidines and pyrrolidinones.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

An article Chemical Discrimination of Astragalus mongholicus and Astragalus membranaceus Based on Metabolomics Using UHPLC-ESI-Q-TOF-MS/MS Approach WOS:000501529700053 published article about RADIX in [Wang, Yumei; Liu, Lei; Ma, Yukun; Guo, Lina; Sun, Yu; Liu, Qi; Liu, Jicheng] Qiqihar Med Univ, Res Inst Med & Pharm, Bukui St 333, Qiqihar 161006, Peoples R China in 2019.0, Cited 35.0. Computed Properties of C15H12O. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Astragalus mongholicus (MG) and Astragalus membranaceus (MJ), both generally known as Huangqi in China, are two perennial herbals widely used in variety diseases. However, there were still some differences in the chemical ingredients between MG and MJ. In this paper, metabolomics combined with the ultra-high performance liquid chromatography coupled with electrospray ionization/quadrupole time-of-flight mass spectrometry (UHPLC-ESI-Q-TOF-MS/MS) was employed to contrastively analyze the chemical constituents between MG and MJ. As a result, principal component analysis showed that MG and MJ were separated clearly. A total of 53 chemical markers were successfully identified for the discrimination of MG and MJ. Of them, the contents of 36 components including Astragaloside IIII, Astragaloside IV, Agroastragaloside I, etc. in MJ were significantly higher than those in MG. On the contrary, the contents of 17 other components including coumaric acid, formononetin, sophoricoside, etc. in MG were obviously higher than those in MJ. The results showed that the distinctive constituents in MG and MJ were remarkable, and MJ may own stronger pharmacological activities than MG. In a word, MG and MJ may be treated as two different herbs. This paper demonstrated that metabolomics was a vitally credible technology to rapidly screen the characteristic chemical composition of traditional Chinese medicine.

Computed Properties of C15H12O. Bye, fridends, I hope you can learn more about C15H12O, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Recommanded Product: Chalcone. I found the field of Chemistry very interesting. Saw the article Asymmetric epoxidation of alpha,beta-unsaturated ketones catalyzed by rare-earth metal amides RE[N(SiMe3)(2)](3) with chiral TADDOL ligands published in 2021.0, Reprint Addresses Lu, CR; Zhao, B (corresponding author), Soochow Univ, Key Lab Organ Synth Jiangsu Prov, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China.. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone.

The catalytic asymmetric epoxidation of alpha,beta-unsaturated ketones by tert-butylhydroperoxide (TBHP) has been well established using rare-earth metal amides RE[N(SiMe3)(2)](3) (RE = La(1), Nd(2), Sm(3), Y(4), Yb(5)) with chiral TADDOL ligands. It was found that the combination of Yb[N(SiMe3)(2)](3) and chiral TADDOL ligand H2L2 ((4S,5S)-2,2-dimethyl-alpha,alpha,alpha ‘,alpha ‘-tetra-3,5-bis(trifluormethylphenyl)-1,3-dioxolane-4,5-dimethanol) in a 1 : 1 molar ratio was the optimal choice, which provided the desired epoxides in excellent yields (89-99%) and good to high enantioselectivities (57-94% ee), using DBU as an additive. Various substrates were proved to have functional group tolerance. In addition, gram-level experiments and derivatization experiments were also studied.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

An article Antioxidative Activity of 1,3,5-Triazine Analogues Incorporating Aminobenzene Sulfonamide, Aminoalcohol/Phenol, Piperazine, Chalcone, or Stilbene Motifs WOS:000534617300018 published article about TRIAZINE DERIVATIVES; LIPID-PEROXIDATION; PROMISING SCAFFOLD; INCREASE SURVIVAL; RADIATION-THERAPY; CHEMOTHERAPY; NUTRIENTS; TAMOXIFEN; EFFICACY; CANCER in [Havrankova, Eva; Calkovska, Nikola; Padrtova, Tereza; Csollei, Jozef; Opatrilova, Radka] Univ Vet & Pharmaceut Sci, Dept Chem Drugs, Fac Pharm, Brno 61242, Czech Republic; [Pazdera, Pavel] Masaryk Univ, Dept Chem, Ctr Synth Sustainable Condit & Their Management, Fac Sci, Brno 62500, Czech Republic in 2020.0, Cited 49.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Category: thiazolidines

A series of 1,3,5-triazine analogues, incorporating aminobenzene sulfonamide, aminoalcohol/ phenol, piperazine, chalcone, or stilbene structural motifs, were evaluated as potential antioxidants. The compounds were prepared by using step-by-step nucleophilic substitution of chlorine atoms in starting 2,4,6-trichloro-1,3,5-triazine. Reactions were catalyzed by Cu(I)-supported on a weakly acidic resin. The radical scavenging activity was determined in terms of %inhibition activity and EC50, using the ABTS method. Trolox and ascorbic acid (ASA) were used as standards. In the lowest concentration 1 X 10(-4) M, the %inhibition activity values at 0 min were comparable with both standards at least for 10 compounds. After 60 min, compounds 5, 6, 13, and 25 showed nearly twice %inhibition (73.44-87.09%) in comparison with the standards (Trolox = 41.49%; ASA = 31.07%). Values of EC50 at 60 min (17.16-27.78 mu M) were 5 times lower for compounds 5, 6, 13, and 25 than EC50 of both standards (trolox = 178.33 mu M; ASA = 147.47 mu M). Values of EC50 correlated with %inhibition activity. Based on these results, the presented 1,3,5-triazine analogues have a high potential in the treatment of illnesses caused or related to oxidative stress.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Recommanded Product: 94-41-7. In 2020.0 J FOOD SCI published article about RADICAL-SCAVENGING ACTIVITY; CHEMICAL-COMPOSITION; ANTIOXIDANT ACTIVITY; SAN-JUAN; CHALCONES; PUNCTATA; EXTRACTS; REGIONS; ANTIBACTERIAL; MANAGEMENT in [Salas, Ana L.; Orqueda, Maria Eugenia; Uriburu, Florencia M. Correa; Perez, Maria Jorgelina; Alvarez, Maria de los Angeles; Zampini, Iris Catiana; Isla, Maria Ines] CONICET UNT, Inst Bioprospecc & Fisiol Vegetal INBIOFIV, RA-4000 San Miguel De Tucuman, Tucuman, Argentina; [Salas, Ana L.; Uriburu, Florencia M. Correa; Zampini, Iris Catiana; Isla, Maria Ines] Univ Nacl Tucuman, Fac Ciencias Nat, RA-4000 San Miguel De Tucuman, Tucuman, Argentina; [Mercado, Maria Ines; Garcia, Maria Elena; Ponessa, Graciela I.; Zampini, Iris Catiana; Isla, Maria Ines] Fdn Miguel Lillo, Area Bot, Inst Morfol Vegetal, RA-4000 San Miguel De Tucuman, Tucuman, Argentina; [Uriburu, Florencia M. Correa; Maldonado, Luis Maldonado] Inst Nacl Tecnol Agr INTA, Estn Expt Agr Famailla, RA-4132 Famailla, Tucuman, Argentina in 2020.0, Cited 48.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

The effect of Argentine propolis extracts against enzymes related to metabolic syndrome and oxidative stress, as well as the botanical origin of raw propolis, were studied. Histological and chemical analyses of propolis samples revealed that the botanical origin isZuccagnia punctata, an Argentine medicinal plant. The melissopalynological analysis showed both pollen grains ofZ. punctataand the other plant species. This result indicates that the differences found in the botanical remains compared to the palynological studies may have been caused by the bees selecting resinous shrubs mainly ofZ. punctatafor the production of propolis and other plants with flowers for the production of honey. The richness of propolis was remarkable in two flavonoid precursors (2 ‘,4 ‘-dihydroxy-3 ‘-methoxychalcone, 2 ‘,4 ‘-dihydroxychalcone), the major chemical components ofZ. punctata. The hydroalcoholic extracts of Argentine propolis andZ. punctatawere able to inhibit enzymes associated with the metabolic syndrome, including alpha-glucosidase, alpha-amylase and lipase, with IC(50)values between 7 to 14, 37 to 48, and 13 to 28 mu g/mL, respectively. Biological activity was mainly attributed to chalcones. Oxygen and nitrogen reactive species scavenging activity was determined by the assays of superoxide radical (O-2(center dot-)), hydroxyl radical (HO center dot), hydrogen peroxide (H2O2), nitric oxide (NO center dot), and cation radical (ABTS(center dot+)). Results showed SC(50)values between 115 to 278, 12.50 to 46; 39 to 92; 50 to 104.50 and 23 to 33.75 mu g/mL, respectively. This study suggests for the first time that propolis from Argentina is highly effective in inhibiting enzymes related to the metabolic syndrome and in free-radical scavenging that would justify its use as a dietary supplement or as a functional ingredient in special food. Practical Application Propolis from Catamarca, Argentina, is traditionally used as medicine and food. Its botanical origin isZuccagnia punctata, an endemic plant species popularly used as a medicine in Argentina. Propolis has the ability to regulate the activity of enzymes involved in the carbohydrate and lipid metabolism, and consequently in metabolic syndrome. Besides, its antioxidant capacity makes it a natural product that can be used as a dietary supplement or as a functional ingredient in special foods. It is important to highlight that in the Argentine Food Code, propolis was incorporated in 2008 as a dietary supplement and the present results give major added value to this product.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Recently I am researching about IN-VITRO; DERIVATIVES; PARASITES; ANALOGS; HIT, Saw an article supported by the Ministerio de Ciencia, Tecnologia e Innovacion – Minciencias; Universidad de Antioquia [111571249860, 061-2016]. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Gonzalez, LA; Upegui, YA; Rivas, L; Echeverri, F; Escobar, G; Robledo, SM; Quinones, W. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone. SDS of cas: 94-41-7

Chalcones are a group of natural products with many recognized biological activities, including antiparasitic activity. Although a lot of chalcones have been synthetized and assayed against parasites, the number of structural features known to be involved in this biological property is small. Thus, in the present study, 21 chalcones were synthesized to determine the effect of substituents in the A and B rings on the activity againstLeishmania braziliensis, Trypanosoma cruzi, andPlasmodium falciparum. The compounds were active againstL. braziliensisin a structure-dependent manner. Only one compound was very active againstT. cruzi, but none of them had a significant antiplasmodial activity. The electron-donating substituents in ring B and the hydrogen bonds at C-2 ‘ with carbonyl affect the antiparasitic activity.

Welcome to talk about 94-41-7, If you have any questions, you can contact Gonzalez, LA; Upegui, YA; Rivas, L; Echeverri, F; Escobar, G; Robledo, SM; Quinones, W or send Email.. SDS of cas: 94-41-7

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Product Details of 78-39-7. I found the field of Chemistry very interesting. Saw the article Total Syntheses of (-)-Deoxoapodine, (-)-Kopsifoline D, and (-)-Beninine published in 2020.0, Reprint Addresses Peng, XS (corresponding author), Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong 100051, Peoples R China.; Peng, XS (corresponding author), Chinese Univ Hong Kong, State Key Lab Synthet Chem, Shatin, Hong Kong 100051, Peoples R China.; Peng, XS (corresponding author), Chinese Univ Hong Kong Shenzhen, Sch Sci & Engn, Shenzhen 518172, Peoples R China.; Peng, XS (corresponding author), Chinese Univ Hong Kong, Shenzhen Municipal Key Lab Chem Synth Med Organ M, Shenzhen Res Inst, Shenzhen 518507, Peoples R China.. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane.

The total syntheses of Aspidosperma and Kopsia alkaloids (-)-deoxoapodine, (-)-kopsifoline D, and (-)-beninine are described through a domino deprotection-Michael addition-nucleophilic substitution protocol to assemble the core framework in efficient steps. Corey-Bakshi-Shibata reduction was employed to afford the enantioenriched intermediate for the total syntheses of the aforementioned alkaloids. The chirality was shown to completely transfer to the backbone using Johnson-Claisen rearrangement. The enantioselective total syntheses of (-)-kopsifoline D and (-)-beninine were accomplished for the first time. Our strategy opens up practical avenues for the total synthesis of structurally similar alkaloids.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Recently I am researching about ANAPHYLACTIC SHOCK, Saw an article supported by the . Published in LIPPINCOTT WILLIAMS & WILKINS in PHILADELPHIA ,Authors: Ryoo, CH; Choi, YH; Cheon, JE; Yoon, SH; Kang, HR; Park, SJ; Lee, W. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane. Application In Synthesis of 1,1,1-Triethoxyethane

Objectives Currently, the prevention of recurrent immediate hypersensitivity reactions (HSRs) to contrast media (CM) requests premedication and changing the culprit contrast agent. However, strategies for the prevention of immediate HSRs to gadolinium-based magnetic resonance contrast agents (GBCAs) have not yet been established. This study aimed to evaluate the effectiveness of changing the contrast agent and single-dose premedication for HSR recurrence prevention in patients with a history of mild immediate HSR to GBCA. Materials and Methods The outcomes of patients with mild immediate HSR to GBCA who subsequently underwent enhanced magnetic resonance imaging between October 2012 and July 2017 were analyzed. The institutional CM monitoring system was retrospectively reviewed, and data on the application of premedication and choice of CM were obtained. Gadolinium-based magnetic resonance contrast agents were classified into 3 classes according to their molecular structure (macrocyclic ionic, macrocyclic nonionic, and linear ionic). Intravenous chlorpheniramine 4 mg, 30 minutes before the GBCA administration, or intravenous methylprednisolone sodium succinate 40 mg plus chlorpheniramine 4 mg, 1 hour before the GBCA administration, was administrated as premedication regimen. Recurrence rates of immediate HSR were compared according to prevention strategies. Results A total of 185 patients with a history of mild immediate HSR to GBCA were re-exposed to GBCA 397 times during the study period. The overall recurrence rate was 19.6% (78/397). Changing the culprit GBCA significantly reduced the recurrence rate, compared with reusing the culprit GBCA (6.9%, 9/130 and 25.8%, 69/267; P < 0.001). The recurrence rate was lowest when the GBCA was changed to a different molecular structure class from the culprit agent, followed by changing to CM with the same molecular structure and reusing the culprit GBCA (6.2%, 7/113 vs 11.8%, 2/17 vs 25.8%, 69/267; P < 0.001 with chi(2) test for trend). Single-dose premedication demonstrated no significant prophylactic effect on recurrence (20.4%, 17/98 vs 17.3%, 61/299 with and without premedication, respectively; P = 0.509). Premedication in addition to changing CM also showed no additional prophylactic effect (7.2%, 7/97 and 6.1%, 2/33, respectively; P = 0.821). Conclusions Changing the CM from the culprit agent could reduce the chance of HSR recurrence in patients with prior mild immediate HSR to GBCA, especially when the CM was changed to one of a different molecular structure class. However, single-dose premedication administration did not show significant HSR recurrence rate difference. Welcome to talk about 78-39-7, If you have any questions, you can contact Ryoo, CH; Choi, YH; Cheon, JE; Yoon, SH; Kang, HR; Park, SJ; Lee, W or send Email.. Application In Synthesis of 1,1,1-Triethoxyethane

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Formula: C8H18O3. In 2019.0 EUR J ORG CHEM published article about BEARING PENTAFLUOROSULFANYL GROUPS; GAMMA-LACTONES; FLUORINE; SF5; SUBSTITUENTS; INHIBITORS; CHEMISTRY; ACID; OXYTRIFLUOROMETHYLATION; TRIFLUOROMETHYL in [Roudias, Majdouline; Gilbert, Audrey; Paquin, Jean-Francois] Univ Laval, CCVC, Dept Chim, PROTEO, 1045 Ave Med,Pavillon Alexandre Vachon, Quebec City, PQ G1V 0A6, Canada in 2019.0, Cited 79.0. The Name is 1,1,1-Triethoxyethane. Through research, I have a further understanding and discovery of 78-39-7.

The synthesis of 5-[(pentafluorosulfanyl)methyl]-gamma-butyrolactones bearing different substituents at position 3 or 4 is reported. A silver-promoted intramolecular cyclization of substituted 4-chloro-5-(pentafluorosulfanyl)pentanoic acids allows the preparation of the substituted SF5-containing gamma-butyrolactones in up to 96 % yield.

Formula: C8H18O3. Bye, fridends, I hope you can learn more about C8H18O3, If you have any questions, you can browse other blog as well. See you lster.

Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com

Recommanded Product: 94-41-7. In 2019.0 PHOTOCHEM PHOTOBIOL published article about COMPLEXES; GREEN in [Ohashi, Kota; Kinoshita, Yusuke; Tamiaki, Hitoshi] Ritsumeikan Univ, Grad Sch Life Sci, Kusatsu, Shiga, Japan in 2019.0, Cited 21.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

C3-(Trans-2-arylethenyl)carbonylated chlorophyll derivatives possessing a bacteriochlorin or chlorin pi-system were synthesized by cross-aldol (Claisen-Schmidt) condensation of methyl pyrobacteriopheophorbide-a or 3-acetyl-3-devinyl-pyropheophorbide-a bearing the C3-acetyl group with p-(un)substituted benzaldehydes under basic conditions. The corresponding porphyrin-type chlorophyll derivatives were prepared by the oxidation (17,18-didehydrogenation) of the chlorin-type. Their Qy absorption and fluorescence emission maxima in dichloromethane correlated well with Hammett substituent constants of the p-substituents. Several electron-withdrawing p-substituents suppressed the emission due to photoinduced electron transfer quenching in a molecule. The substitution sensitivities for their maxima and fluorescence quantum yields decreased in the order of bacteriochlorin-, chlorin- and porphyrin-type derivatives.

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Reference:
Thiazolidine – Wikipedia,
,Thiazolidine – ScienceDirect.com