Tag: M.W=150-200

Grayson, James D.; Partridge, Benjamin M. published the artcile< Mild Cu-Catalyzed Oxidation of Benzylic Boronic Esters to Ketones>, SDS of cas: 94-02-0, the main research area is benzylic boronic ester preparation copper complex catalyzed oxidation; ketone preparation.

The oxidation of benzylic boronic esters directly to the ketone is reported. This mild Cu-catalyzed method uses an ambient atm. of air as the terminal oxidant and is notably chemoselective. Oxidation of the C-B bond occurs selectively, even in the presence of unprotected alcs. Initial study suggests the reaction proceeds through an alkylboron to Cu transmetalation, peroxide formation, and rearrangement to give the carbonyl.

ACS Catalysis published new progress about Boronic acids, esters Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (benzylic boronic esters). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, SDS of cas: 94-02-0.

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

Surakanti, Ramu; Sanivarapu, Sumalatha; Thulluri, Chiranjeevi; Iyer, Pravin S.; Tangirala, Raghuram S.; Gundla, Rambabu; Addepally, Uma; Murthy, Y. L. N.; Velide, Lakshmi; Sen, Subhabrata published the artcile< Corrigendum: Synthesis of Privileged Scaffolds by Using Diversity-Oriented Synthesis [Erratum to document cited in CA159:742720]>, Related Products of 30095-98-8, the main research area is pyrrolidine indoline cyclotryptamine preparation anticancer antibacterial erratum; spiro indoline preparation anticancer antibacterial erratum.

In the Supporting Information, spectra for 1, 5, 7, 8, 11, 16, 17, 18a, 20, 21and 24 were found to have been edited to remove solvents and minor impurities. Original spectra were located and replaced for all the compounds The spectra editing does not affect the conclusions of the published paper and all yields were found to be correct.

Chemistry – An Asian Journal published new progress about Antibacterial agents. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Related Products of 30095-98-8.

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

Levy, Daniel E.; Lapierre, France; Liang, Weisheng; Ye, Wenqing; Lange, Christopher W.; Li, Xiaoyuan; Grobelny, Damian; Casabonne, Marie; Tyrrell, David; Holme, Kevin; Nadzan, Alex; Galardy, Richard E. published the artcile< Matrix Metalloproteinase Inhibitors: A Structure Activity Study>, Application of C6H10O5, the main research area is matrix metalloproteinase inhibitor preparation structure activity; stromelysin inhibitor hydroxamic acid preparation; neutrophil collagenase inhibitor hydroxamic acid preparation; gelatinase inhibitor hydroxamic acid preparation.

Modifications around the dipeptide-mimetic core of hydroxamic acid based matrix metalloproteinase inhibitors I [AA = L-Trp, D-Trp, L-Trp(Me), L-3-benzothienylalanine, L-1- and -2-naphthylalanine, L-3- and -8-quinolylalanine, L-4-phenylphenylalanine, L-Phe, L-3- and -4-pyridylalanine, L-tert-leucine, L-abrine; R6 = NHMe, NH(CH2)4Me, NHCH2CH2OH, NHCH2CH2NHCO2CH2Ph, cyclopropylamino, cyclopentylamino, (S)- and (R)-1-indanylamino, (1R,2S)- and (1S,2R)-2-hydroxy-1-indanylamino, (S)-NHCHMePh, NHCH2Ph, piperonylamino, 2-, 3-, and 4-pyridylmethylamino, 2-(4-pyridyl)ethylamino, NHCH2CH2C6H4OH-4, 2-furanylmethylamino, 2-thiazolylmethylamino, 2-benzimidazolylamino, 3-(1-imidazolyl)propylamino, 3-(4-morpholinyl)propylamino; R2 = H, OH; R3 = CH2CHMe2, Bu, n-hexyl, n-octyl, OCHMe2, O(CH2)4Me] were studied. These variations incorporated a variety of natural, unnatural, and synthetic amino acids in addition to modifications of the P1′ and P3′ substituents. The results of this study indicate the following structural requirements: (1) Two key hydrogen bonds must be present between the enzyme and potent substrates. (2) Potent inhibitors must possess potent zinc-binding functionalities. (3) The potential importance of the hydrophobic group at position R3 as illustrated by its ability to impart greater relative potency against stromelysin when larger hydrophobic groups are used. (4) Requirements surrounding the nature of the amino acid appear to be more restrictive for stromelysin than for neutrophil collagenase, 72 kDa gelatinase, and 92 kDa gelatinase. These requirements may involve planar fused-ring aryl systems and possibly hydrogen-bonding capabilities.

Journal of Medicinal Chemistry published new progress about Hydroxamic acids Role: BAC (Biological Activity or Effector, Except Adverse), BSU (Biological Study, Unclassified), SPN (Synthetic Preparation), BIOL (Biological Study), PREP (Preparation). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Application of C6H10O5.

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

Tymtsunik, Andriy V.; Kokhan, Serhii O.; Ivon, Yevhen M.; Komarov, Igor V.; Grygorenko, Oleksandr O. published the artcile< Intramolecular functional group differentiation as a strategy for the synthesis of bridged bicyclic β-amino acids>, Name: (S)-Dimethyl 2-hydroxysuccinate, the main research area is nipecotic acid analog beta amino acid bridged bicyclic preparation.

Differentiation of identical electrophilic functional groups (carboxylates) by a strategically placed internal nucleophile (an amino group) in cyclic precursors was used as a key general approach to functionalized azabicyclic scaffolds. The utility of the method was demonstrated by the synthesis of three bicyclic β-amino acids (analogs of nipecotic acid), which were prepared in good yields and on a relatively large scale.

RSC Advances published new progress about Bicyclic compounds Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (aza-). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Name: (S)-Dimethyl 2-hydroxysuccinate.

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

Biswas, Kallolmay; Kumar, Arvind; Das Sarma, Koushik published the artcile< One-Pot High-Throughput Synthesis of a 160-Membered Library of Methyl 3,5-Diaryl-isoxazoline-5-carboxylate Pharmacophores by a 2·2·2-Component Reaction>, Name: Methyl 2-(2-nitrophenyl)acetate, the main research area is aryl aldehyde arylacetate high throughput multicomponent reaction; oxime arylacrylate intermediate sequential two component reaction; diaryloxazoline carboxylate library one pot preparation.

A simple and efficient methodol. has been developed for the synthesis of Me 3,5-diaryl-isoxazoline-5-carboxylates in a high-throughput fashion from aryl aldehydes and Me arylacetates. This was accomplished in one-pot by a sequence of three 2-component reactions steps (2·2·2-CR), through oxime and α-arylacrylate intermediates, whereby compounds were obtained in overall 30-66% isolated yields. The functional group diversity was established by synthesizing a 160-membered library.

ACS Combinatorial Science published new progress about 1,3-Dipolar cycloaddition reaction. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Name: Methyl 2-(2-nitrophenyl)acetate.

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

Shi, Weihua; Jiang, Zhigan; He, Haiying; Xiao, Fubiao; Lin, Fusen; Sun, Ya; Hou, Lijuan; Shen, Liang; Han, Lixia; Zeng, Minggao; Lai, Kunmin; Gu, Zhengxian; Chen, Xinsheng; Zhao, Tao; Guo, Li; Yang, Chun; Li, Jian; Chen, Shuhui published the artcile< Discovery of 3,3'-Spiro[Azetidine]-2-oxo-indoline Derivatives as Fusion Inhibitors for Treatment of RSV Infection>, Electric Literature of 30095-98-8, the main research area is spiro azetidine indoline fusion inhibitor respiratory syncytial virus.

A new series of 3,3′-spirocyclic 2-oxo-indoline derivatives was synthesized and evaluated against respiratory syncytial virus (RSV) in a cell-based assay and animal model. Extensive structure-activity relationship study led to a lead compound 14h, which exhibited excellent in vitro potency with an EC50 value of 0.8 nM and demonstrated 71% oral bioavailability in mice. In a mouse challenge model of RVS infection, 14h demonstrated superior efficacy with a 3.9log RSV virus load reduction in the lung following an oral dose of 50 mg/kg.

ACS Medicinal Chemistry Letters published new progress about Antiviral agents. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Electric Literature of 30095-98-8.

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

Iliyasov, Taigib M.; Karpenko, Kirill A.; Akulinin, Alexander S.; Fakhrutdinov, Artem N.; Korolev, Viktor A.; Elinson, Michail N.; Vereshchagin, Anatoly N. published the artcile< Stereoselective one-pot five-component synthesis of polysubstituted 1,4,5,6-tetrahydropyridines with two and three stereocenters>, Name: Ethyl 3-oxo-3-phenylpropanoate, the main research area is polysubstituted tetrahydropyridine preparation stereoselective; aldehyde ester oxocarboxylic acid one pot five component reaction.

A novel five-component stereoselective synthesis of polysubstituted tetrahydropyridines is reported. The Knoevenagel condensation – Michael addition – Mannich reaction – cyclization – dehydration cascade of aldehydes, esters of 3-oxocarboxylic acids C-H acids and ammonium acetate provides convenient access to 2-substituted alkyl (4SR,6RS)-4,6-diaryl-5,5-dicyano-1,4,5,6-tetrahydropyridine-3-carboxylates with two stereocenters and 3,5-dialkyl (4RS,5SR,6RS)-5-cyano-2,4,6-triaryl-1,4,5,6-tetrahydropyridine-5,3-carboxylates with three stereocenters in 57-84% yields. It was established that formation of products proceeds via substituted 2-hydroxypiperidines with four stereocenters. Ammonium acetate plays a dual role, acting as a base and as a nitrogen source. Five bonds are formed as a result of multicomponent process. The formation of single diastereomers was confirmed by singe crystal X-ray diffraction studies and 2D-NMR spectroscopy.

ARKIVOC (Gainesville, FL, United States) published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Name: Ethyl 3-oxo-3-phenylpropanoate.

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

Critcher, Douglas; Pattenden, Gerald published the artcile< Synthetic studies towards pateamine, a novel thiazole-based 19-membered bis-lactone from Mycale sp>, Reference of 617-55-0, the main research area is pateamine lactone preparation.

A concise synthesis of the 19-membered bis-lactone core I present in pateamine using chiral pool starting materials and featuring an intramol. Stille coupling reaction as a key stratagem, is described.

Tetrahedron Letters published new progress about 617-55-0. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Reference of 617-55-0.

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

Wimmer, Eric; Borghese, Sophie; Blanc, Aurelien; Beneteau, Valerie; Pale, Patrick published the artcile< Zeolite-Based Organic Synthesis (ZeoBOS) of Acortatarin A: First Total Synthesis Based on Native and Metal-Doped Zeolite-Catalyzed Steps>, Reference of 7126-50-3, the main research area is acortatarin A total synthesis zeolite organic synthesis; spiroketalization silver zeolite catalyst total synthesis acortatarin A; cross coupling copper zeolite catalyst total synthesis acortatarin A; copper; doped-zeolite; silver; spiroketalization; ynamide formation.

Similarly to polymer-supported assisted synthesis (PSAS), organic synthesis could be envisaged being performed by using zeolites, native or metal-doped, as heterogeneous catalysts. To illustrate this unprecedented Zeolite-Based Organic Synthesis (ZeoBOS), the total synthesis of acortatarin A (I) was achieved through a novel strategy and using five out of eleven synthetic steps catalyzed by H- or metal-doped zeolites as catalysts. Notably, the formation of an yne-pyrrole intermediate with a copper-doped zeolite and the spiroketalization of an alkyne diol with a silver-doped zeolite have been developed as key steps of the synthesis.

Chemistry – A European Journal published new progress about Cross-coupling reaction. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, Reference of 7126-50-3.

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

Dean, Jacob C.; Kusaka, Ryoji; Walsh, Patrick S.; Allais, Florent; Zwier, Timothy S. published the artcile< Plant Sunscreens in the UV-B: Ultraviolet Spectroscopy of Jet-Cooled Sinapoyl Malate, Sinapic Acid, and Sinapate Ester Derivatives>, HPLC of Formula: 617-55-0, the main research area is plant UV B UV spectroscopy jet cold sinapate derivative.

UV spectroscopy of sinapoyl malate, an essential UV-B screening agent in plants, was carried out in the cold, isolated environment of a supersonic expansion to explore its intrinsic UV spectral properties in detail. Despite these conditions, sinapoyl malate displays anomalous spectral broadening extending well over 1000 cm-1 in the UV-B region, presenting the tantalizing prospect that nature’s selection of UV-B sunscreen is based in part on the inherent quantum mech. features of its excited states. Jet-cooling provides an ideal setting in which to explore this topic, where complications from intermol. interactions are eliminated. In order to better understand the structural causes of this behavior, the UV spectroscopy of a series of sinapate esters was undertaken and compared with ab initio calculations, starting with the simplest sinapate chromophore sinapic acid, and building up the ester side chain to sinapoyl malate. This “”deconstruction”” approach provided insight into the active mechanism intrinsic to sinapoyl malate, which is tentatively attributed to mixing of the bright V (1ππ*) state with an adiabatically lower 1nπ* state which, according to calculations, shows unique charge-transfer characteristics brought on by the electron-rich malate side chain. All members of the series absorb strongly in the UV-B region, but significant differences emerge in the appearance of the spectrum among the series, with derivatives most closely associated with sinapoyl malate showing characteristic broadening even under jet-cooled conditions. The long vibronic progressions, conformational distribution, and large oscillator strength of the V (ππ*) transition in sinapates makes them ideal candidates for their role as UV-B screening agents in plants.

Journal of the American Chemical Society published new progress about Ab initio methods. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, HPLC of Formula: 617-55-0.

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