Month: October 2021

Recently I am researching about C-C ACTIVATION; RING-SLIPPAGE; H BOND; CLEAVAGE; BIOMASS; FUELS; ALKENYLATION; CHEMISTRY, Saw an article supported by the National Science FoundationNational Science Foundation (NSF) [CHE1664652]. Category: thiazolidines. Published in AMER CHEMICAL SOC in WASHINGTON ,Authors: Pannilawithana, N; Yi, CS. The CAS is 94-41-7. Through research, I have a further understanding and discovery of Chalcone

The chelate assistance strategy was devised to promote a highly regioselective catalytic C-C bond activation reaction of saturated and unsaturated carbonyl compounds. The cationic Ru-H complex 1 was found to be an effective catalyst for mediating the coupling reaction of 1,2-disubstituted indoles with alpha,beta-unsaturated aldehydes and ketones, in which the regioselective C-alpha-C-beta activation of the carbonyl substrates has been achieved in forming the 3-alkylindole products. The analogous coupling reaction of indoles with saturated aldehydes and ketones directly led to the C-alpha- C-beta cleavage of the carbonyl substrates in forming the 3-allcylindole products. The coupling reaction of 1,2-dimethylinole with (E)-3-nonen-2-one and 2-propanol-d(8) showed 20-22% of deuterium incorporation to both alpha- and beta-CH2 of the 3-alkylindole product. The coupling reaction of 1,2-dimethylinole with (E)-3-nonen-2-one exhibited the most significant carbon kinetic isotope effect on the alpha-carbon of the product (C-alpha = 1.046). The Hammett plot constructed from the reaction of 1,2-dimethylinole with a series of para-substituted enones p-X-C6H4CH=CHCOCH3 (X = OMe, Me, H, Cl, CF3) showed a modest promotional effect by an electron-donating group (rho = -0.2 +/- 0.1). Several catalytically relevant Ru-H species were detected by NMR from a stoichiometric reaction mixture of the Ru-H complex 1 with 1,2-dimethylindole and (E)-3-nonen-2-one in CD2Cl2. These results support a mechanism of the catalytic coupling reaction via conjugate addition of indoles to enones followed by the C-C bond activation and hydrogenolysis steps.

Category: thiazolidines. About Chalcone, If you have any questions, you can contact Pannilawithana, N; Yi, CS or concate me.

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

An article Michael Addition of Indoles to Enones Catalyzed by a Cationic Iron Salt WOS:000605598700002 published article about CONJUGATE ADDITION; 1,4-ADDITION; ALKYLATION; PYRROLE; ARYLSILOXANES; COMPLEXES; CHLORIDE; ACIDS in [Inishi, Tsukasa; Hirata, Goki; Nishikata, Takashi] Yamaguchi Univ, Grad Sch Sci & Engn, 2-16-1 Tokiwadai, Ube, Yamaguchi 7558611, Japan in 2021.0, Cited 27.0. Name: Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Indoles are one of the most valuable nucleophiles in Michael additions catalyzed by a proper Lewis acid. In this paper, we found that a cationic iron salt is effective to carry out the Michael addition of indoles. beta-Mono- and disubstituted enones reacted smoothly with indoles under our conditions. The cationic iron catalyst is very active, and the maximum TON was up to 425. Moreover, cationic iron-catalyzed conditions enabled a chemoselective Michael addition of a substrate possessing both enone and alpha,beta-unsaturated ester moieties.

About Chalcone, If you have any questions, you can contact Inishi, T; Hirata, G; Nishikata, T or concate me.. Name: Chalcone

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

An article (+/-)-trans-1,2-Cyclohexanediamine-Based Bis(NHC) Ligand for Cu-Catalyzed Asymmetric Conjugate Addition Reaction WOS:000489178000082 published article about N-HETEROCYCLIC CARBENES; PALLADIUM COMPLEXES; ENANTIOSELECTIVE HYDROSILYLATION; STEREODIRECTING LIGANDS; CHIRAL BENZIMIDAZOLES; ARYLBORONIC ACIDS; METAL-COMPLEXES; AZOLIUM SALTS; REVERSAL; 1,4-ADDITION in [Ishibashi, Azusa; Kamihigashi, Shun; Iwai, Yuuki; Sakaguchi, Satoshi] Kansai Univ, Fac Chem Mat & Bioengn, Dept Chem & Mat Engn, Suita, Osaka 5648680, Japan in 2019.0, Cited 107.0. SDS of cas: 94-41-7. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Bis(NHC) ligand precursors, L1, based on trans-1,2-diaminocyclohexane were designed and synthesized. To introduce chirality at the hydroxyamide side arm on the NHC of L1, a chiral beta-amino alcohol, such as enantiopure leucinol, was used. Cu-catalyzed asymmetric conjugate addition reactions of cyclic and acyclic enones with Et2Zn were selected to evaluate the performance of L1 as a chiral ligand. For the reaction of cyclic enone, a combination of [bis(trimethylsilyl)acetylene]-(hexafluoroacetylacetonato)copper(I) (Cu(hfacac)(btmsa)) with a (+/-)-trans-1,2-cyclohexanediamine-based bis(NHC) ligand precursor, (rac; S,S)-L1, which was prepared from (S)-leucinol, was the most effective. Thus, treating 2-cyclohexen-1-one (3) with Et2Zn in the presence of catalytic amounts of Cu(hfacac)(btmsa) and (rac; S,S)-L1 afforded (R)-3-ethylcyclohexanone ((R)-4) with 97% ee. Similarly, use of (rac; R,R)-L1, which was prepared from (R)-leucinol, produced (S)-4 with 97% ee. Conversely, for the asymmetric 1,4-addition reaction of the acyclic enone, optically pure (-)-trans-1,2-cyclohexanediamine-based bis(NHC) ligand precursor, (R,R; S,S)-L1, worked efficiently. For example, 3-nonen-2-one (5) was reacted with Et 2 Zn using the CuOAc/(R,R; S,S)-L1 catalytic system to afford (R)-4-ethylnonan-2-one ((R)-6) with 90% ee. Furthermore, initially changing the counterion of the Cu precatalyst between an OAc and a ClO4 ligand on the metal reversed the facial selectivity of the approach of the substrates. Thus, the conjugate addition reaction of 5 with Et2Zn using the Cu(ClO4)(2)/(R,R; S,S)-L1 catalytic system, afforded (S)-6 with 75% ee.

SDS of cas: 94-41-7. About Chalcone, If you have any questions, you can contact Ishibashi, A; Kamihigashi, S; Iwai, Y; Sakaguchi, S or concate me.

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

An article Noble-metal-free TiO2 photocatalysis for selective C = C reduction of alpha,beta-enones by CF3SO3H modification WOS:000556422000002 published article about CHEMOSELECTIVE HYDROGENATION; CONJUGATE REDUCTION; ALCOHOLS; OXIDATION; CATALYSIS; TITANIUM; ELECTRON in [Li, Jundan; Wang, Yi; Zhai, Shan; Ma, Dongge] Beijing Technol & Business Univ, Coll Chem & Mat Engn, Dept Chem, Beijing 100048, Peoples R China; [Liu, Anan] Univ Sci & Technol Beijing, Basic Expt Ctr Nat Sci, Beijing, Peoples R China; [Chen, Chuncheng] Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing, Peoples R China in 2020.0, Cited 26.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Recommanded Product: Chalcone

The highly selective C = C reduction of alpha,beta-enones was realized by CF3SO3H-modifying noble-metal-free TiO2 photocatalysis. Selectivity for C = C over C = O reduction was dramatically reversed from fair (similar to 42% without CF3SO3H-modifying) to excellent (> 99%) upon only 6 mol% CF3SO3H loading without any noble-metal additive. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) and C-13-nuclear magnetic resonance (NMR) demonstrated that CF3SO3H modification results in the alpha,beta-enone polar C = O bond sitting away from rather than near to the active sites of polar TiO2 catalysts.

Recommanded Product: Chalcone. About Chalcone, If you have any questions, you can contact Li, JD; Liu, AN; Wang, Y; Zhai, S; Ma, DG; Chen, CC or concate me.

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

An article Synthesis of Trifluoromethyl- and Ester Group-Substituted alpha-Carbolines via Iron-Catalyzed Tandem Cyclization Reaction WOS:000526405900036 published article about ONE-POT SYNTHESIS; AMINATION; FLUORINE; INDOLES in [Xu, Yumin; Chen, Xiaoqian; Gao, Yiqin; Wan, Changfeng; Liu, Jin-Biao] Jiangxi Normal Univ, Coll Chem & Chem Engn, Minist Educ, Nanchang 330022, Jiangxi, Peoples R China; [Xu, Yumin; Chen, Xiaoqian; Gao, Yiqin; Wan, Changfeng; Liu, Jin-Biao] Jiangxi Normal Univ, Key Lab Funct Small Organ Mol, Minist Educ, Nanchang 330022, Jiangxi, Peoples R China; [Liu, Jin-Biao] Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Peoples R China; [Yan, Zicong; Wang, Zhiyong] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China in 2020.0, Cited 47.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Recommanded Product: Chalcone

An efficient approach to prepare trifluoromethyl-alpha-carbolines and ester group-substituted alpha-carbolines via the tandem cyclization reaction of 2-(2-aminophenyl)acetonitriles and trifluoromethyl 1,3-diones or beta,gamma-unsaturated alpha-ketoesters was reported. The transformation proceeded smoothly in the presence of catalytic environmental-benign iron salts, which are used to prepare the desired products in moderate to good yields.

Recommanded Product: Chalcone. About Chalcone, If you have any questions, you can contact Xu, YM; Chen, XQ; Gao, YQ; Yan, ZC; Wan, CF; Liu, JB; Wang, ZY or concate me.

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

An article Synthesis and Biological Activity of New 4-tert-Butylcyclohexanone Derivatives WOS:000458565500015 published article about CLAISEN REARRANGEMENT; LACTONES; KETONES in [Koziol, Agata; Jasnowski, Mateusz; Grela, Ewa; Lochynski, Stanislaw] Wroclaw Univ Sci & Technol, Dept Bioorgan Chem, Wyb Wyspianskiego 27, PL-50370 Wroclaw, Poland; [Koziol, Agata; Lochynski, Stanislaw] Wroclaw Coll Physiotherapy, Inst Cosmetol, Kosciuszki 4, PL-50038 Wroclaw, Poland; [Szczepanik, Maryla] Nicolaus Copernicus Univ, Dept Invertebrate Zool, Lwowska 1, PL-87100 Torun, Poland; [Gabrys, Beata; Dancewicz, Katarzyna] Univ Zielona Gora, Fac Biol Sci, PL-65516 Szafrana, Zielona Gora, Poland in 2019.0, Cited 31.0. COA of Formula: C8H18O3. The Name is 1,1,1-Triethoxyethane. Through research, I have a further understanding and discovery of 78-39-7

In the synthesis performed in this study, derivatives of 4-tert-butylcyclohexanone 1 were obtained using typical reactions of organic synthesis. The bioactivity of the selected compounds was evaluated. 1-(Bromomethyl)-8-tert-butyl-2-oxaspiro[4.5]decan-3-one (5) was characterized by attractant properties against larvae and a weak feeding deterrent activity against adults of Alphitobius diaperinus Panzer. This bromolactone was a moderate antifeedant towards Myzus persicae Sulzer. In addition, ethyl (4-tert-butylcyclohexylidene)acetate (2) and bromolactone 5 displayed antibacterial activity. The strongest bacteriostatic effect was observed against Gram-positive strains: Bacillus subtilis and Staphylococcus aureus. The bromolactone 5 also limited the growth of Escherichia coli strain.

COA of Formula: C8H18O3. About 1,1,1-Triethoxyethane, If you have any questions, you can contact Koziol, A; Jasnowski, M; Grela, E; Szczepanik, M; Gabrys, B; Dancewicz, K; Lochynski, S or concate me.

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

An article 4-Aminoindoles as 1,4-bisnucleophiles for diversity-oriented synthesis of tricyclic indoles bearing 3,4-fused seven-membered rings WOS:000471907500016 published article about ONE-POT SYNTHESIS; FACILE SYNTHESIS; 3-COMPONENT REACTIONS; 4-COMPONENT REACTIONS; EXPEDIENT SYNTHESIS; EFFICIENT SYNTHESIS; CATALYST; HYDROGENATION; PROTOCOL; CASCADE in [Chen, Shaomin; Ravichandiran, Palanisamy; El-Harairy, Ahmed; Li, Minghao; Gu, Yanlong] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Large Format Battery Mat & Syst, Wuhan 430074, Hubei, Peoples R China; [Queneau, Yves] Univ Claude Bernard, Univ Lyon 1, Univ Lyon,INSA Lyon,CPE Lyon,ICBMS, Inst Chim & Biochim Mol & Supramol,CNRS,UMR 5246, Batiment Lederer,1 Rue Victor Grignard, F-69622 Villeurbanne, France; [Gu, Yanlong] Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China in 2019.0, Cited 97.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7. Name: Chalcone

A straightforward access to tricyclic indoles bearing 3,4-fused seven-membered rings has been established by using 4-aminoindoles as 1,4-bisnucleophiles in three-component reactions. 1H-Azepino[4,3,2-cd]indoles, 4,6-dihydro-1H-azepino[4,3,2-cd]indoles and 1,3,4,6-tetrahydro-5H-azepino[4,3,2-cd]indol-5-ones could thus be synthesized in one pot in moderate to good yields. Beyond opening access to 3,4-fused tricyclic indoles, the use of easily accessible 4-aminoindoles as C,N-1,4-bisnucleophiles also provides a new platform to be used in a diversity-oriented synthesis strategy, fully displaying its benefits of maximizing molecular complexity and reaction diversity.

About Chalcone, If you have any questions, you can contact Chen, SM; Ravichandiran, P; El-Harairy, A; Queneau, Y; Li, MH; Gu, YL or concate me.. Name: Chalcone

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

Category: thiazolidines. In 2019.0 TETRAHEDRON LETT published article about ASYMMETRIC TRANSFER HYDROGENATION; LIGAND; EXTRACTION; SEPARATION; BEARING; ENANTIOSELECTIVITY; PALLADIUM; ACTINIDES in [Wang, Liandi; Liu, Tingting] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China; [Liu, Tingting] Henan Acad Sci, Inst Chem, Zhengzhou 450002, Henan, Peoples R China in 2019.0, Cited 42.0. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7.

The transfer hydrogenation of ketones catalyzed by transition metal complexes has attracted much attention. A series of ruthenium(11) complexes bearing 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)pyridine ligands (R-BTPs) were synthesized and characterized by NMR analysis and X-ray diffraction. These ruthenium (II) complexes were applied in the transfer hydrogenation of ketones. Their different catalytic activity were attributed to the alkyl arms on the 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)pyridine. As the length of the alkyl arms rising, the catalytic activities of the complex catalysts decreased. By means of 0.4 mol % catalyst RuCl2(PPh3)(3-methylbutyl-BTP) in refluxing 2-propanol, a variety of ketones were reduced to their corresponding alcohols with >95% conversion over a period of 3 h. (C) 2019 Elsevier Science. All rights reserved. (C) 2019 Elsevier Ltd. All rights reserved.

Category: thiazolidines. About Chalcone, If you have any questions, you can contact Wang, LD; Liu, TT or concate me.

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

Authors Yang, A; Kong, LJ; Wang, H; Yao, XD; Xie, FT; Wang, HY; Ao, X in HINDAWI LTD published article about PHOSPHATE STARVATION RESPONSES; SYSTEM ARCHITECTURE; SUGAR; ARABIDOPSIS; BIOSYNTHESIS; PLANTS; ACID; EXPRESSION; GENES; IDENTIFICATION in [Yang, Ahui; Kong, Lingjian; Wang, Hui; Yao, Xingdong; Xie, Futi; Wang, Haiying; Ao, Xue] Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China in 2020.0, Cited 57.0. Safety of Chalcone. The Name is Chalcone. Through research, I have a further understanding and discovery of 94-41-7

Phosphorus (P) is one the least available essential plant macronutrients in soils that is a major constraint on plant growth. Soybean (Glycine max L.) production is often limited due to low P availability. The better management of P deficiency requires improvement of soybean’s P use efficiency. Sugars are implicated in P starvation responses, and a complete understanding of the role of sucrose together with P in coordinating P starvation responses is missing in soybean. This study explored global metabolomic changes in previously screened low-P-tolerant (Liaodou, L13) and low-P-sensitive (Tiefeng 3, T3) soybean genotypes by liquid chromatography coupled mass spectrometry. We also studied the root morphological response to sucrose application (1%) in P-starved soybean genotypes against normal P supply. Root morphology in L13 genotype has significantly improved P starvation responses as compared to the T3 genotype. Exogenous sucrose application greatly affected root length, root volume, and root surface area in L13 genotype while low-P-sensitive genotype, i.e., T3, only responded by increasing number of lateral roots. Root : shoot ratio increased after sucrose treatment regardless of P conditions, in both genotypes. T3 showed a relatively higher number of differentially accumulated metabolites between P-starved and normal P conditions as compared to L13 genotype. Common metabolites accumulated under the influence of sucrose were 5-O-methylembelin, D-glucuronic acid, and N-acetyl-L-phenylalanine. We have discussed the possible roles of the pathways associated with these metabolites. The differentially accumulated metabolites between both genotypes under the influence of sucrose are also discussed. These results are important to further explore the role of sucrose in the observed pathways. Especially, our results are relevant to formulate strategies for improving P efficiency of soybean genotypes with different P efficiencies.

About Chalcone, If you have any questions, you can contact Yang, A; Kong, LJ; Wang, H; Yao, XD; Xie, FT; Wang, HY; Ao, X or concate me.. Safety of Chalcone

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

Computed Properties of C8H18O3. Recently I am researching about CLAISEN REARRANGEMENT; CARBONYL ALLYLATION; ACID; (-)-EXIGUOLIDE; ALCOHOLS; RING, Saw an article supported by the JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [JP18K05126]; Nagase Science and Technology Foundation. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Oka, K; Fuchi, S; Komine, K; Fukuda, H; Hatakeyama, S; Ishihara, J. The CAS is 78-39-7. Through research, I have a further understanding and discovery of 1,1,1-Triethoxyethane

The catalytic asymmetric total synthesis of (-)-exiguolide, a complex 20-membered macrolide embedded with a bis(tetrahydropyran) motif, is reported. The convergent synthesis involves the construction of the C1-C11 tetrahydropyran segment via catalytic asymmetric allylation and Prins cyclization, and the formation of the C12-C21 phosphonate segment via catalytic asymmetric cyclocondensation reaction and Johnson-Claisen rearrangement. The synthesis of 15-epi-exiguolide is also described.

Computed Properties of C8H18O3. About 1,1,1-Triethoxyethane, If you have any questions, you can contact Oka, K; Fuchi, S; Komine, K; Fukuda, H; Hatakeyama, S; Ishihara, J or concate me.

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