Month: October 2021

An article Asymmetric Synthesis of Axially Chiral Phosphamides via Atroposelective N-Allylic Alkylation WOS:000513099200066 published article about NON-BIARYL ATROPISOMERS; CATALYZED ENANTIOSELECTIVE CONSTRUCTION; BAYLIS-HILLMAN ACETATES; CYCLIC DIARYLIODONIUM; GAMMA-BUTENOLIDES; LIGANDS; ALLYLATION; ANILIDES; INDOLES; SPIROLACTONIZATION in [Yang, Guo-Hui; Zheng, Hanliang; Li, Xin; Cheng, Jin-Pei] Nankai Univ, Coll Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China in 2020.0, Cited 110.0. Application In Synthesis of Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Axially chiral anilide compounds are an emerging but scarcely investigated class of stereogenic molecules with potential applications as biologically active scaffolds. Because of the lower rotation barriers, the synthesis of these compounds is a challenging task. Furthermore, the status of the limited structure type of chiral anilide constrains the latent capacity of the C-N axis as a chiral source in the application of asymmetric synthesis. Herein, we disclose an efficient protocol for the construction of the rationally designed axially chiral phosphamides via atroposelective N-allylic alkylation reaction of MBH carbonates and phosphamides. The simple hydroquinidine catalyst proves to be most efficient in this artroposelective strategy, delivering the desired axially chiral phosphamides in good yields and high enantioselectivities. In addition, a phosphamide compound, which contains both P-stereogenic center and C-N axial chirality, can be obtained by this method through a kinetic resolution process. Because of the large steric diaryl phosphoryl group, the synthesized axially chiral anilide has a large rotational barrier. As a demonstration, current studied axially chiral ortho-iodine substituted phosphamides could act as efficient chiral hypervalent iodine(III) catalysts for the asymmetric oxidative dearomatization of phenols. Moreover, a speculative model, which can explain the enantiocontrol, was proposed based on the experimental observation and theoretical calculation.

Application In Synthesis of Chalcone. About Chalcone, If you have any questions, you can contact Yang, GH; Zheng, HL; Li, X; Cheng, JP or concate me.

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

COA of Formula: C15H12O. Sk, MR; Maji, MS in [Sk, Md Raja; Maji, Modhu Sudan] Indian Inst Technol Kharagpur, Dept Chem, Kharagpur 721302, WB, India published Cobalt(iii)-catalyzed ketone-directed C-H vinylation using vinyl acetate in 2020, Cited 84. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

Weakly coordinating, ketone-directed C-H vinylation using vinyl acetate is reported here for a wide range of aromatic ketones such as acetophenones, diaryl ketones, chromones and biologically relevant chalcones under cost-effective and air-stable cobalt(iii)-catalysis. Regioselective, mono-vinylation occurs for challenging vinyl substitution-free styrenes in moderate to good yields, and this moiety has been used to synthesize functionalized indanone, alpha-naphthol and an advanced intermediate for bruguierol A synthesis. An acrylate-surrogate provided the corresponding alkenylated product under these vinylation conditions. Detailed mechanistic studies are carried out to support the proposed catalytic cycle.

About Chalcone, If you have any questions, you can contact Sk, MR; Maji, MS or concate me.. COA of Formula: C15H12O

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

An article BA-12 Inhibits Angiogenesis via Glutathione Metabolism Activation WOS:000484411100219 published article about DRUG TARGET IDENTIFICATION; VASCULAR DEVELOPMENT; WEB SERVER; DIFFERENTIATION; BEVACIZUMAB; MECHANISMS; GROWTH; VEGF in [Cui, Herong; Guo, Wenbo; Zhang, Beibei; Li, Guoping; Li, Tong; Yuan, Yanyan; Zhang, Na; Yang, Yuwei; Chu, Fuhao; Xu, Bing; Wang, Penglong; Lei, Haimin] Beijing Univ Chinese Med, Sch Chinese Pharm, Beijing 102488, Peoples R China; [Feng, Wuwen] Chengdu Univ Tradit Chinese Med, Sch Pharm, Chengdu 610000, Sichuan, Peoples R China; [Wang, Shenglan] Beijing Univ Chinese Med, Sch Acupuncture & Massage, Beijing 102488, Peoples R China in 2019.0, Cited 45.0. Formula: C15H12O. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

There is a need for an efficient and low-cost leading compound discovery mode. However, drug development remains slow, expensive, and risky. Here, this manuscript proposes a leading compound discovery strategy based on a combination of traditional Chinese medicine (TCM) formulae and pharmacochemistry, using a ligustrazine-betulinic acid derivative (BA-12) in the treatment of angiogenesis as an example. Blocking angiogenesis to inhibit the growth and metastasis of solid tumors is currently one recognized therapy for cancer in the clinic. Firstly, based on a traditional Prunella vulgaris plaster, BA-12 was synthesized according to our previous study, as it exhibited better antitumor activities than other derivatives on human bladder carcinoma cells (T24); it was then uploaded for target prediction. Secondly, the efficacy and biotoxicity of BA-12 on angiogenesis were evaluated using human umbilical vein endothelial cells (HUVECs), a quail chick chorioallantoic membrane, and Caenorhabditis elegans. According to the prediction results, the main mechanisms of BA-12 were metabolic pathways. Thus, multiple metabolomics approaches were applied to reveal the mechanisms of BA-12. Finally, the predictive mechanisms of BA-12 on glutathione metabolism and glycerophospholipid metabolism activation were validated using targeted metabolomics and pharmacological assays. This strategy may provide a reference for highly efficient drug discovery, with the aim of sharing TCM wisdom for unmet clinical needs.

About Chalcone, If you have any questions, you can contact Cui, HR; Guo, WB; Zhang, BB; Li, GP; Li, T; Yuan, YY; Zhang, N; Yang, YW; Feng, WW; Chu, FH; Wang, SL; Xu, B; Wang, PL; Lei, HM or concate me.. Formula: C15H12O

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

Authors Hejazifar, M; Palvolgyi, AM; Bitai, J; Lanaridi, O; Bica-Schroder, K in AMER CHEMICAL SOC published article about AROMATIC KETONES; TRANSFER REDUCTION; CHIRAL LIGANDS; WATER; CATALYST; COMPLEXES; RUTHENIUM; IMINES; RESOLUTION in [Hejazifar, Mahtab; Palvoelgyi, Adam Mark; Bitai, Jacqueline; Lanaridi, Olga; Bica-Schroeder, Katharina] TU Wien, Inst Appl Synthet Chem, Getreidemarkt 9-163, A-1060 Vienna, Austria in 2019.0, Cited 57.0. Formula: C15H12O. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

A thermomorphic ionic-liquid-based microemulsion system was successfully applied for the Ru-catalyzed asymmetric transfer hydrogenation of ketones. On the basis of the temperature-dependent multiphase behavior of the targeted microemulsion, simple product separation as well as catalyst recycling could be realized. The use of water-soluble ligands improved the immobilization of the catalyst in the microemulsion phase and significantly decreased the catalyst leaching into the organic layer upon extraction of the product. Eventually, the optimized microemulsion system could be applied to a wide range of aromatic ketones that were reduced with good isolated yields (up to 98%) and enantioselectivities (up to 97%), while aliphatic ketones were less successful.

Formula: C15H12O. About Chalcone, If you have any questions, you can contact Hejazifar, M; Palvolgyi, AM; Bitai, J; Lanaridi, O; Bica-Schroder, K or concate me.

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

An article A New Hybrid delta-Lactone Induces Apoptosis and Potentiates Anticancer Activity of Taxol in HL-60 Human Leukemia Cells WOS:000531833400004 published article about CANCER-CELLS; DNA-DAMAGE; IN-VITRO; SESQUITERPENE LACTONE; KAPPA-B; PARTHENOLIDE; COMBINATION; PACLITAXEL; AGENTS; MITOCHONDRIA in [Gach-Janczak, Katarzyna; Drogosz-Stachowicz, Joanna; Dlugosz-Pokorska, Angelika; Janecka, Anna] Med Univ Lodz, Dept Biomol Chem, Mazowiecka 6-8, PL-92215 Lodz, Poland; [Jakubowski, Rafal; Janecki, Tomasz] Lodz Univ Technol, Inst Organ Chem, Zeromskiego 116, PL-90924 Lodz, Poland; [Jakubowski, Rafal] Polish Acad Sci, Ctr Mol & Macromol Studies, Sienkiewicza 112, PL-90363 Lodz, Poland; [Szymanski, Jacek] Med Univ Lodz, Cent Lab, Mazowiecka 6-8, PL-92215 Lodz, Poland in 2020.0, Cited 62.0. Formula: C8H18O3. The Name is 1,1,1-Triethoxyethane. Through research, I have a further understanding and discovery of 78-39-7

In the search for new drug candidates, researchers turn to natural substances isolated from plants which may be either used directly or may serve as a source for chemical modifications. An interesting strategy in the design of novel anticancer agents is based on the conjugation of two or more biologically active structural motifs into one hybrid compound. In this study, we investigated the anticancer potential of 4-benzyl-5,7-dimethoxy-4-methyl-3-methylidene-3,4-dihydro-2H-chroman-2-one (DL-247), a new hybrid molecule combining a chroman-2-one skeleton with an exo-methylidene bond conjugated with a carbonyl group, in human myeloid leukemia HL-60 cell line. The cytotoxicity of the new compound was tested using MTT assay. The effect of DL-247 on cell proliferation and apoptosis induction were studied by flow cytometry, fluorometric assay and ELISA analysis. DL-247 displayed high cytotoxic activity (IC50 = 1.15 mu M, after 24 h incubation), significantly inhibited cell proliferation and induced apoptosis by both, the intrinsic and extrinsic pathways. A combination of DL-247 with taxol exhibited a strong synergistic effect on DNA damage generation, apoptosis induction and inhibition of cell growth.

About 1,1,1-Triethoxyethane, If you have any questions, you can contact Gach-Janczak, K; Drogosz-Stachowicz, J; Dlugosz-Pokorska, A; Jakubowski, R; Janecki, T; Szymanski, J; Janecka, A or concate me.. Formula: C8H18O3

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

Recently I am researching about D-MANNO-HEPTOSE; INNER-CORE; BINDING; GLYCOSIDES; LIPOPOLYSACCHARIDES; RECOGNITION, Saw an article supported by the Austrian Science Fund (FWF)Austrian Science Fund (FWF) [J 3449-N28]. Published in FRONTIERS MEDIA SA in LAUSANNE ,Authors: Suster, C; Baxendale, IR; Mihovilovic, MD; Stanetty, C. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane. Category: thiazolidines

Bacterial lipopolysaccharides (LPS) are important bio-medical structures, playing a major role in the interaction with human immune systems. Their core regions, containing multiple units ofl-glycero-d-mannoheptoses (l,d-heptose), are highly conserved structurally (withO3 andO7 glycosidic bonds), making them an epitope of high interest for the potential development of new antibiotics and vaccines. Research in this field has always been restricted by the limited availability of the parentl,d-heptose as well as its biochemical epimeric precursord-glycero-d-mannoheptose (d,d-heptose). This problem of availability has recently been solved by us, through a rapid and efficient practical synthesis ofl,d-manno-heptose peracetate demonstrated at scale. Herein we report an optimized, technically simple and versatile synthetic strategy for the differentiation of both thel-glyceroandd-glycero-d-mannoheptose scaffolds. Our approach is based on an orthoester methodology for the differentiation of all three positions of the sugar core using aO6,O7-tetraisopropyl disiloxyl (TIPDS) protecting group for the exocyclic positions. Furthermore, the regioselective opening toward 7-OH acceptors (6O-FTIPDS ethers) differentiates the exocyclic diol which has been demonstrated with a broader set of substrates and for bothmanno-heptoses for the first time.

About 1,1,1-Triethoxyethane, If you have any questions, you can contact Suster, C; Baxendale, IR; Mihovilovic, MD; Stanetty, C or concate me.. Category: thiazolidines

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

In 2019.0 ORG LETT published article about ANTIBACTERIAL ACTIVITY; ORGANOCATALYTIC ACTIVATION; BLIGHT in [Pan, Dingwu; Zan, Ningning; Lv, Ya; Song, Bao-An; Chi, Yonggui Robin; Jin, Zhichao] Guizhou Univ, Lab Breeding Base Green Pesticide & Agr Bioengn, Key Lab Green Pesticide & Agr Bioengn, Guiyang 550025, Guizhou, Peoples R China; [Mou, Chengli] Guizhou Univ Tradit Chinese Med, Guiyang 550025, Guizhou, Peoples R China; [Chi, Yonggui Robin] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore in 2019.0, Cited 42.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Application In Synthesis of Chalcone

A chemoselective cascade cycloaddition reaction is developed for green and efficient access to cyclopenta-[c]pyridine derivatives. Simple and inexpensive NaOH is used as the sole catalyst for this process. The delta-carbon of cyclopropyl ester is activated as a nucleophiic carbon to initiate highly chemoselective cascade reactions. Cyclopenta-[c]pyridines bearing various substituents are afforded in excellent yields. Preliminary studies on the bioactivities of the afforded products show promising antibacterial activities for potential applications in plant protections.

Application In Synthesis of Chalcone. About Chalcone, If you have any questions, you can contact Pan, DW; Mou, CL; Zan, NN; Lv, Y; Song, BA; Chi, YR; Jin, ZC or concate me.

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

Formula: C15H12O. Recently I am researching about 1,10-PHENANTHROLINE; COMPLEXES; LIGANDS, Saw an article supported by the Russian Science FoundationRussian Science Foundation (RSF) [18-73-00133]. Published in SPRINGER in NEW YORK ,Authors: Sannikova, VA; Filippov, IR; Karmatskikh, OY; Panfilov, MA; Andreev, RV; Vorob’ev, AY. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone

The reaction ofN-amino-1,10-phenanthrolinium mesitylenesulfonate with acceptor-substituted alkenes in the K2CO3-DMSO system gave 3- and 2,3-substituted pyrazolo[1,5-a][1,10]phenanthrolines. A wide range of alkenes enter into this reaction; however, in the case of nitro derivatives, complex mixtures of products were formed.

Formula: C15H12O. About Chalcone, If you have any questions, you can contact Sannikova, VA; Filippov, IR; Karmatskikh, OY; Panfilov, MA; Andreev, RV; Vorob’ev, AY or concate me.

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

In 2020.0 ORG LETT published article about TERTIARY BORONIC ESTERS; ASYMMETRIC HYDROBORATION; ENANTIOSELECTIVE HYDROBORATION; ALKENE HYDROBORATION; CARBONYL-COMPOUNDS; BETA-BORATION; BORYLATION; HYDROFUNCTIONALIZATION; AZETIDINES; SECONDARY in [Zhao, Hongliang; Zhang, Panke] Zhengzhou Univ, Coll Chem, Green Catalysis Ctr, Henan Adv Inst Technol, Zhengzhou 450001, Henan, Peoples R China; [Zhao, Hongliang; Gao, Qian; Zhang, Yajuan; Xu, Senmiao] Chinese Acad Sci, Ctr Excellence Mol Sci, Suzhou Res Inst, Lanzhou Inst Chem Phys,State Key Lab Oxo Synth &, Lanzhou 730000, Gansu, Peoples R China; [Xu, Senmiao] Hangzhou Normal Univ, Key Lab Organosilicon Chem & Mat Technol, Minist Educ, Hangzhou 311121, Peoples R China; [Xu, Senmiao] Univ Chinese Acad Sci, Beijing 100049, Peoples R China in 2020.0, Cited 84.0. The Name is 1,1,1-Triethoxyethane. Through research, I have a further understanding and discovery of 78-39-7. Application In Synthesis of 1,1,1-Triethoxyethane

Reported here for the first time is the Ir-catalyzed gamma-selective hydroboration of gamma-substituted allylic amides under mild reaction conditions. A variety of functional groups could be compatible with reaction conditions, affording gamma-branched amides in good yields with <= 97% gamma-selectivity. We have also demonstrated that the obtained borylated products could be used in a series of C-O, C-F, C-Br, and C-C bond-forming reactions. Application In Synthesis of 1,1,1-Triethoxyethane. About 1,1,1-Triethoxyethane, If you have any questions, you can contact Zhao, HL; Gao, Q; Zhang, YJ; Zhang, PK; Xu, SM or concate me.

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

I found the field of Materials Science very interesting. Saw the article Injectable amine functionalized graphene and chondroitin sulfate hydrogel with potential for cartilage regeneration published in 2019.0. COA of Formula: C8H18O3, Reprint Addresses Sydlik, SA (corresponding author), Carnegie Mellon Univ, Dept Chem, 4400 Fifth Ave, Pittsburgh, PA 15213 USA.; Sydlik, SA (corresponding author), Carnegie Mellon Univ, Dept Biomed Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA.. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane

Damaged cartilage does not readily heal and often requires surgical intervention that only modestly improves outcomes. A synthetic material that could be injected and covalently crosslinked in situ to form a bioactive, mechanically robust scaffold that promotes stem cell chondrogenic differentiation holds promise for next-generation treatment of cartilage lesions. Here, Johnson-Claisen rearrangement chemistry was performed on graphene oxide (GO) to enable functionalization with a primary amine covalently bound to the graphenic backbone through a chemically stable linker. The primary amines are used to form covalent crosslinks with chondroitin sulfate, an important component of cartilage that promotes regeneration, to form a hydrogel (EDAG-CS). The EDAG-CS system gels in situ within 10 min, and the graphenic component imparts improved mechanical properties, including stiffness (320% increase) and toughness (70% increase). EDAG-CS hydrogels are highly porous, resistant to degradation, and enable the growth of human mesenchymal stem cells and their deposition of collagen matrix. This system has potential to improve clinical outcomes of patients with cartilage damage.

COA of Formula: C8H18O3. About 1,1,1-Triethoxyethane, If you have any questions, you can contact Tang, CX; Holt, BD; Wright, ZM; Arnold, AM; Moy, AC; Sydlik, SA or concate me.

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