Tag: 100-200

On October 5, 2018, Wang, Mengdan; Kong, Lingkai; Wang, Ye; Song, Bo; Sun, Yue; Tang, Rong; Li, Yanzhong published an article.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one The title of the article was Sequential C-C σ-Bond Cleavage/(sp2) C-O Bond Formation via C-H Functionalization toward Pyranoindolones Fused with Medium-Sized Rings. And the article contained the following:

An atom-economical procedure for the synthesis of pyranoindolones fused with 7- or 8-membered rings has been developed. This process is realized through the sequential Cs2CO3-promoted C-C σ-bond cleavage of cyclic ketoesters and a ZnI2-mediated selective C-H/O-H coupling reaction. Two of the C-C σ-bonds are cleaved and one of the sp2 C-H bonds is functionalized during the reaction process. Easily accessible starting materials and broad substrate scope make this protocol attractive in synthetic organic chem. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

The Article related to carbon bond cleavage, bond formation carbon oxygen, pyranoindolone fused sized ring preparation, indolyl alkynyl ketone cyclization oxocycloalkane carboxylate, indolecarbonyl phenylcyclooctadiene carboxylate preparation crystal mol structure, oxohexahydrocyclooctapyranoindole carboxylate preparation crystal mol structure and other aspects.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On November 30, 2020, He, Yingxia; Liu, Zhipeng; Qian, Michael; Yu, Xiaowei; Xu, Yan; Chen, Shuang published an article.HPLC of Formula: 123-25-1 The title of the article was Unraveling the chemosensory characteristics of strong-aroma type Baijiu from different regions using comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry and descriptive sensory analysis. And the article contained the following:

Comprehensive 2D gas chromatog.-time-of-flight mass spectrometry was combined with descriptive sensory anal. to elucidate the specificity of strong-aroma type Baijiu (Chinese liquor) from different regions, based on regionally distinct flavor characterized by chem. and sensory profiles. Numerous potential aroma compounds (262) were identified, among which 58 aroma compounds were significantly different between the samples from Sichuan and Jianghuai regions. Relationships between these potential aroma compounds and sensory attributes were investigated by partial least squares regression and network anal. The compounds that dominantly contributed to the important sensory attributes were identified. The high pyrazines, furanoids, and carbonyls amounts contributed to the high intensities of the cellar, toasted, and grain aroma profiles of the Sichuan region samples, while the high ester and alc. levels contributed to the fruity and floral aroma profiles of the Jianghuai region samples. This approach may have practical application in flavor characterization of other alc. beverages. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).HPLC of Formula: 123-25-1

The Article related to chemosensory gas chromatog mass spectrometry, 1-butanol, 2,3,5-trimethyl-6-ethylpyrazine, 2,6-dimethylpyrazine, 2-acetylfuran, chemical and sensory profiles, chinese strong-aroma type baijiu, diethyl succinate, dimethyl disulfide, furfural, gc × gc-tofms, methanethiol caproate, multivariate analysis, regionality and other aspects.HPLC of Formula: 123-25-1

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On November 30, 2018, Tran, Van T.; Gurak, John A. Jr; Yang, Kin S.; Engle, Keary M. published an article.Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one The title of the article was Activation of diverse carbon-heteroatom and carbon-carbon bonds via palladium(II)-catalyzed β-X elimination. And the article contained the following:

γ-Substituted N-(8-quinolinyl) alkanecarboxamides and cycloalkanecarboxamides such as I underwent regioselective substitution reactions with nucleophiles such as 1-methyl- and 1,2-dimethylindoles in the presence of Pd(OAc)2 and 1-adamantanecarboxylic acid (1-AdCO2H) to yield substitution products such as II (R = H, Me). The substitutions occurred using elimination reactions of the β-palladated carboxamides as a key step; a β-palladation product was isolated and its structure determined by X-ray crystallog. The substitution reactions occurred at alkyl C(sp3)-oxygen, nitrogen, carbon, fluorine and sulfur bonds with high regioselectivity. The method was used for substitution reactions of γ-substituted amino acids such as the 8-aminoquinolinyl amide of L-methionine and its sulfoxide to give functionalized amino acids in 60-98% ee. Unstrained 8-aminoquinolinyl heterocyclylalkanecarboxamides underwent regioselective γ-substitution reactions with ring opening if a heteroatom was in the γ-position; if the heteroatom was in an appropriate position, lactonization and lactamization reactions also occurred with loss of the aminoquinoline moieties. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one

The Article related to quinolinyl carboxamide regioselective substitution ring opening, amino acid aminoquinoline amide gamma substituted regioselective stereoselective preparation, palladium catalyst regioselective directed substitution quinolinyl alkanecarboxamide, aminoquinoline amino acid amide regioselective gamma substitution and other aspects.Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Guo, Tao; Wei, Xu-Ning; Zhang, Miao; Liu, Yu; Zhu, Li-Min; Zhao, Yun-Hui published an article in 2020, the title of the article was Catalyst and additive-free oxidative dual C-H sulfenylation of imidazoheterocycles with elemental sulfur using DMSO as a solvent and an oxidant.Recommanded Product: Methyl N-Methylanthranilate And the article contains the following content:

Dual C-H sulfenylation was used to obtain 3-vulcanized imidazoheterocycles using odorless elemental sulfur under catalyst- and additive-free conditions. C-H activation of both imidazoheterocycles and arylamines/arenols/indoles was realized by a practical protocol in which DMSO served as both a solvent and an internal oxidant. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Recommanded Product: Methyl N-Methylanthranilate

The Article related to arylamine aryl imidazopyridine sulfur regioselective sulfenylation, arylamino thioimidazopyridine preparation antitumor activity, arenol aryl imidazopyridine sulfur regioselective sulfenylation, hydroxyphenyl thioimidazopyridine preparation antitumor activity, indole aryl imidazopyridine sulfur sulfenylation and other aspects.Recommanded Product: Methyl N-Methylanthranilate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On April 5, 2013, Clark, J. Stephen; Yang, Guang; Osnowski, Andrew P. published an article.Formula: C5H10O3 The title of the article was Synthesis of the C-1-C-17 Fragment of Amphidinolides C, C2, C3, and F. And the article contained the following:

The C1-C17 fragment, I, of amphidinolides C, C2, C3, and F has been constructed from a trans-2,5-disubstituted dihydrofuranone II prepared by diastereoselective rearrangement of a free or metal-bound oxonium ylide generated from a metal carbenoid (no data). The dihydrofuranone was converted into aldehyde III, which corresponds to the C1-C8 framework, and this was coupled to the C9-C17 unit IV by nucleophilic addition of a vinylic anion. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Formula: C5H10O3

The Article related to amphidinolide c1 c17 fragment enantioselective synthesis, stereoselective aldol amphidinolide c1 c17 fragment enantioselective synthesis, regioselective hydrostannylation amphidinolide c1 c17 fragment enantioselective synthesis, tin lithium exchange amphidinolide c1 c17 fragment enantioselective synthesis and other aspects.Formula: C5H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On July 2, 2021, Kabes, Connor; Lucas, Reagan; Gunn, Jack; Gladysz, John published an article.Computed Properties of 10472-24-9 The title of the article was Chiral Cobalt(III) Tris(1,2-diamine) Catalysts That Incorporate Nitrogenous Base Containing Anions for the Bifunctional Activation of Nucleophiles and Electrophiles in Enantioselective Addition Reactions. And the article contained the following:

Here, The lipophilic diastereomeric cobalt complexes Λ or Δ-[Co((S,S)-dpen)3]3+ 2Cl-BArf- (Λ or Δ-(S,S)-23+ 2Cl-BArf-; dpen/BArf- = 1,2-diphenylethylenediamine/B(3,5-C6H3(CF3)2)4-) ,salts of nicotinates, isonicotinates, related sulfonates, and N,N-dimethylaminobenzoate were applied addition reactions. The 6-chloronicotinate salt gaves slower rates and lower ee values, and the 6-aminonicotinate salt gave faster rates and higher ee values. The 6-Me, 2-methoxy, and unsubstituted analogs afforded intermediate results. The 6-aminonicotinate catalyst was applied to additions of di-Me malonate to aryl-substituted nitroolefins and additions of 1,3-dicarbonyl compounds to di-t-Bu azodicarboxylate, with average yields/ee values of 90%/85% and 94%/77%, resp. The authors were unaware of other ionic catalysts for which Bronsted bases was productively incorporated into the anions, which were seldom if ever purposefully functionalized in any manner. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Computed Properties of 10472-24-9

The Article related to chiral diamine cobalt complex preparation, nitroolefin dimethyl malonate cobalt complex catalyst enantioselective michael addition, ditertiarybutyl azodicarboxylate dicarbonyl compound cobalt catalyst enantioselective michael addition, bistertiarybutoxycarbonyl hydrazino dicarbonyl compound preparation and other aspects.Computed Properties of 10472-24-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Luecke, Daniel; Kalesse, Markus published an article in 2019, the title of the article was Polyoxygenated Tertiary Alcohols: A Kiyooka Approach.Recommanded Product: 3976-69-0 And the article contains the following content:

A Kiyooka aldol approach for the stereoselective synthesis of tertiary alcs. I (R = (2R)-3-[(4-methoxyphenyl)methoxy]-2-methylpropyl, (2R)-2-[(4-methoxyphenyl)methoxy]propyl, (2S,3R)-3-[(4-methoxyphenyl)methoxy]-2-methylbutyl, (2R,3R)-3-[(4-methoxyphenyl)methoxy]-2-methylbutyl; R1 = C(O), CH-OTBS) is presented. This approach allows for the incorporation of different substituents at all three remaining positions at the chiral center bearing the tertiary alc.I. To demonstrate the validity of this approach different chiral alcs. I were depicted and the relationship of double bond geometry of the ketene acetal II and the diastereoselectivity was established. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Recommanded Product: 3976-69-0

The Article related to tertiary alc preparation enantioselective diastereoselective, tertbutyldimethylsilyl protected hemiacetal preparation enantioselective diastereoselective, chiral aldehyde ketene acetal kiyooka aldol reaction, aldol reaction, chiral aldehydes, double bond geometry, ketene acetal, structure elucidation and other aspects.Recommanded Product: 3976-69-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On March 20, 2003, Shimano, Masanao; Kamei, Noriyuki; Tanaka, Tomohiro; Harada, Tatsuhiro; Haino, Makoto; Okuyama, Akihiko; Arakawa, Yoshio; Murakami, Yoshiko published a patent.Computed Properties of 37480-41-4 The title of the patent was Preparation of reverse hydroxamic acid derivatives as selective inhibitors of TNF-α converting enzyme (TACE). And the patent contained the following:

Reverse hydroxamic acid derivatives, i.e. N-[2-[[(hetero)arylalkoxy](hetero)arylsulfonyl]ethyl] hydroxamic acid derivatives having specific structures represented by the general formula A-CON(OH)C(R1)(R2a)CH2SO2-Ar1-OCH2Ar2 [A = H, lower alkyl, cycloalkyl, (un)substituted NH2; Ar1 = arylene or heteroarylene; Ar2 = (un)substituted aryl, aralkyl, heteroaryl, or heteroarylalkyl; R1 = H, (un)substituted lower alkyl, lower alkenyl, or cycloalkyl; R2a = Q, Q1; wherein R5, R6, R16 = H, halo, OH, cyano, CF3, (un)substituted lower alkyl or alkoxy; R17 = H, halo, (un)substituted lower alkyl; R68, R69, R70, R71 = H, (un)substituted lower alkyl; X1, X2, Y1, Y2 = a single bond, O, S, (un)substituted CH2 or NH; Z1, Z2 = O, S, (un)substituted :CH or :NH, O(CH2)rO, S(CH2)r1S, O(CH2)t1S; wherein r, r1, t1 = an integer of 2-4; m1, m2 = an integer of 0-6; n1, n2, q1, q2 = an integer of 0-3; p1, p2 = 0, 1] are prepared These compounds are useful for the treatment of diseases caused by TNF-α. Thus, 4-(4-methanesulfonylphenoxymethyl)-2-methylquinoline was treated with lithium diisopropylamide/hexane-heptane-ethylbenzene in THF at -78° for 30 min, treated dropwise with a solution of (tetrahydro-4-ylidene)acetaldehyde in THF, and stirred for 30 min to give 77% 1-[4-(2-methylquinolin-4-ylmethoxy)benzenesulfonyl]-3-(tetrahydropyran-4-ylidene)propan-2-ol (I). To a solution of I and Et3N in CH2Cl2 was added methanesulfonyl chloride at -10° and stirred at room temperature for 12 h to give 100% 2-methyl-4-[4-[3-(tetrahydropyran-4-ylidene)prop-1-en-1-ylsulfonyl]phenoxymethyl]quinoline which was stirred with hydroxylamine in aqueous THF at room temperature for 64 h and then formylated by a mixture of formic acid and acetic anhydride at room temperature for 1 h to give 27.0% N-hydroxy-N-[2-[4-(2-methylquinolin-4-ylmethoxy)benzenesulfonyl]-1-(tetrahydropyran-4-ylidene)ethyl]formamide (II). II and optically active II showed IC50 of 3.5 and 2.2 μM, resp., against TACE and were inactive against MMP1, 2, 3, 8, 9, 13, 14, and 17. II at 3 mg/kg (s.c. injection) in vivo inhibited the Escherichia coli-derived lipopolysaccharide (LPS)-induced production of TNF-α by 74.8% in male Lewis rats. The experimental process involved the reaction of Methyl 1-methyl-4-oxocyclohexanecarboxylate(cas: 37480-41-4).Computed Properties of 37480-41-4

The Article related to reverse hydroxamic acid preparation selective tnf converting enzyme inhibitor, tace selective inhibitor reverse hydroxamic acid preparation, tnf production inhibitor hydroxyquinolinylmethoxybenzenesulfonylethylformamide preparation, hydroxyformamide reverse hydroxamic acid preparation tace inhibitor and other aspects.Computed Properties of 37480-41-4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On June 15, 2015, Duss, Michael; Capolicchio, Samanta; Linden, Anthony; Ahmed, Nisar; Jessen, Henning J. published an article.Application of 707-07-3 The title of the article was Desymmetrization of myo-inositol derivatives by lanthanide catalyzed phosphitylation with C2-symmetric phosphites. And the article contained the following:

Desymmetrization by phosphorylation represents a promising method with potential impact in many different areas of research. C2-Sym. phosphoramidites have been used to desymmetrize myo-inositol derivatives by functionalization at different positions. With this method, 1:1 mixtures of diastereomers are obtained that can be separated subsequently. In this work, activation of a C2-sym. phosphoramidite is achieved by addition of pentafluorophenol (PFP) and leads to a reactive PFP phosphite, which can then be coupled to protected myo-inositol derivatives with reactive OH groups at the 1, 3, 4 and 6 positions. This strategy enhances the diastereoselectivity of the coupling reaction with a preference towards phosphitylation at position 6 (up to 3:1) or position 3 (up to 2:1). The concept of activation of phosphoramidites via in situ generated pentafluorophenol phosphite triesters is thus proven in these studies. It is further shown that Lewis-Acid catalysis enhances the rate of phosphite triester coupling without affecting the diastereoselectivity. This novel strategy improves access to different phosphorylated myo-inositol derivatives and will thus enable further studies into the function of these important intracellular second messengers. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Application of 707-07-3

The Article related to pentafluorophenol coupling phosphoramidite pentafluorophenol catalysis inositol intracellular messenger, inositol desymmetrization lanthanide catalyzed phosphitylation phosphorylation phosphoramidite cyclitol, chiral auxiliary, diphosphoinositol polyphosphates, inositol, phosphite, phosphorylation and other aspects.Application of 707-07-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On October 1, 2018, Akcha, Selma; Gomez-Ruiz, Santiago; Kellou-Tairi, Safia; Lezama, Luis; Perez, Frank Blanco; Benali-Baitich, Ouassini published an article.Safety of 3-Acetyldihydrofuran-2(3H)-one The title of the article was Synthesis, characterization, solution equilibria, DFT study, DNA binding affinity and cytotoxic properties of a cobalt(II) complex with a 5-pyrazolone ligand. And the article contained the following:

The authors’ work describes the synthesis, the complexation and the characterization of a cobalt(II) complex with a 5-pyrazolone ligand carrying a thioamide group on N1 position. The study of the complexation in solution allowed the determination of the stability constants of the complex and the distribution of the species involving Co(II) over the whole pH-range. The solid cobalt(II) complex has then been synthesized and fully characterized by IR, electronic, EPR and mass spectrometries, in addition to magnetic and voltammetric measurements. The data clearly indicated an octahedral high spin Co(II) complex with two mononeg. mols. of the N,S-ligand, and two water mols., likely in a cis position because of the high anisotropy. DFT calculations performed on both the ligand and the complex structures allowed the authors to study the spectral features, and to propose the most fitting structures to the exptl. data. The interaction of the 5-pyrazolone ligand and its cobalt(II) complex with fish-sperm DNA has been studied by electronic spectrometry and cyclovoltammetry. Intercalation has been identified as a binding mode and the strength of the binding assessed. In order to explore eventual cytotoxic and/or cytostatic properties of the authors’ compounds, the ligand and the cobalt complex have been tested on PC-3 (human prostate carcinoma) and HT-29 (human colon carcinoma) using sulforhodamine B (SRB) assay. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Safety of 3-Acetyldihydrofuran-2(3H)-one

The Article related to cobalt carbothioamidepyrazolone aqua complex preparation formation constant, magnetic property optimized mol structure cobalt carbothioamidepyrazolone aqua complex, electrochem dna binding cobalt carbothioamidepyrazolone aqua complex, antitumor activity cobalt carbothioamidepyrazolone aqua complex and other aspects.Safety of 3-Acetyldihydrofuran-2(3H)-one

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics