Tag: M.W=150-200

Luginina, Jevgenija; Vasiljevs, Deniss; Ivanovs, Ilgvalds; Mishnev, Anatoly; Turks, Maris published the artcile< Diastereoselective aza-Michael addition for synthesis of carbohydrate-derived spiropiperazinones>, Quality Control of 2743-40-0, the main research area is glycoside spiropiperazinone diastereoselective synthesis aza Michael addition; aza Michael addition nitromethylene glucofuranoside amino acid ester.

3-Deoxy-3-C-nitromethylene-1,2:5,6-di-O-isopropylidene-α-D-glucofuranose reacts with amino acid esters according to the aza-Michael addition pathway. The obtained adducts after reduction of the nitro group spontaneously lactamize and provide novel carbohydrate-derived spiropiperazinones.

Monatshefte fuer Chemie published new progress about Amino acid esters Role: RCT (Reactant), RACT (Reactant or Reagent). 2743-40-0 belongs to class esters-buliding-blocks, and the molecular formula is C8H18ClNO2, Quality Control of 2743-40-0.

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

Bamisha, P.; Sreekumar, Anjana; Gopinath, Anjana; Aswathy, V.; Ujwal Dev, M.; Santhosh, Sona; Sivan, Akhil published the artcile< An easy access to 2,3-dihydrofuran derivatives by oxidative cyclization reactions>, HPLC of Formula: 94-02-0, the main research area is dicarbonyl compound methylcinnamate CAN oxidative radical cyclization green chem; acyl phenyldihydrofuran carboxylate preparation.

An easy and simple access to 2,3-dihydrofuran derivatives from 1,3-dicarbonyl compounds and Me cinnamate was reported. The reaction was facilitated by the CAN mediated oxidative free radical cyclization reaction. Moderate to good yields of products were obtained and preliminary studies of these showed potential medicinal activities. These compounds also find application in material chem. and in dyes.

Materials Today: Proceedings published new progress about 1,3-Dicarbonyl compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, HPLC of Formula: 94-02-0.

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

Liljeblad, Arto; Kanerva, Liisa T. published the artcile< Enzymatic methods for the preparation of enantiopure malic and aspartic acid derivatives in organic solvents>, Synthetic Route of 617-55-0, the main research area is kinetic resolution malic aspartic acid lipase.

The kinetic resolution of malic and aspartic acid diesters as well as of N-butanoylaspartic acid di-Me ester by highly regioselective lipases and acylase I enzymes were studied. Candida antarctica lipase A on Celite catalyzed the enantioselective acylation of the hydroxyl and amino groups. Acylase I from Aspergillus melleus and Candida antarctica lipase B catalyzed the enantioselective alcoholysis of the ester groups at the α- and β-positions, resp.

Tetrahedron: Asymmetry published new progress about Kinetic resolution. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Synthetic Route of 617-55-0.

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

Lagemann, Annika; Dunkel, Andreas; Hofmann, Thomas published the artcile< Activity-Guided Discovery of (S)-Malic Acid 1'-O-β-Gentiobioside as an Angiotensin I-Converting Enzyme Inhibitor in Lettuce (Lactuca sativa)>, Formula: C6H10O5, the main research area is Lactuca malic acid gentiobioside natural antihypertensive ACE inhibitor.

Angiotensin-converting enzyme (ACE), playing a crucial role in the renin angiotensin aldosterone system, is well-known to catalyze the conversion of the decapeptide angiotensin I into the physiol. active octapeptide angiotensin II, triggering blood pressure increasing mechanisms. To meet the demand for natural phytochems. as antihypertensive agents in functional food development, extracts prepared from a series of vegetables were screened for their ACE-inhibitory activity by means of a LC-MS/MS-based in vitro assay. By far the highest ACE inhibition was found for a lettuce extract, in which the most active compound was located by means of activity-guided fractionation. LC-MS, NMR spectroscopy, and hydrolysis experiments followed by ion chromatog. led to the unequivocal identification of the ACE inhibitor as the previously not reported (S)-malic acid 1′-O-β-gentiobioside. This glycoside represents a novel class of ACE-inhibiting phytochems. with a low IC50 value of 27.8 μM. First incubation experiments in saliva and aqueous hydrochloric acid demonstrated the stability of (S)-malic acid 1′-O-β-gentiobioside against salivary glycosidases and stomach acid.

Journal of Agricultural and Food Chemistry published new progress about Angiotensin-converting enzyme inhibitors. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Formula: C6H10O5.

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

Yamada, S.; Nakayama, K.; Takayama, H. published the artcile< Stereoselective synthesis of (23R,25S)- and (23S,25R)-25-hydroxyvitamin D3 26,23-lactone: determination of the configuration of a metabolite of vitamin D3, calcidiol lactone>, Formula: C6H10O5, the main research area is calcidol lactone stereoselective synthesis; hydroxyvitamin D3 lactone preparation configuration; vitamin D3 hydroxy lactone.

The title diastereoisomeric vitamin D3 lactones I were prepared via the condensation of aldehyde II and dioxolanylethyl sulfone III. (23S,25R)-I was identical with the natural metabolite calcidol lactone.

Proceedings of the Workshop on Vitamin D published new progress about 9,10-Secosteroids Role: RCT (Reactant), RACT (Reactant or Reagent). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Formula: C6H10O5.

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

Psarra, Vassiliki; Fousteris, Manolis A.; Hennig, Lothar; Bantzi, Marina; Giannis, Athanassios; Nikolaropoulos, Sotiris S. published the artcile< Identification of azepinone fused tetracyclic heterocycles as new chemotypes with protein kinase inhibitory activities>, Recommanded Product: Ethyl 5-formyl-1H-pyrrole-2-carboxylate, the main research area is azepinone fused tetracyclic heterocycle preparation protein kinase inhibitor.

The design and synthesis of small tetracyclic heterocycles which bear two new regioisomeric 2-carboxyethyl-1H-pyrrole-annulated indoloazepinone scaffolds is described. An azepinone motif, which is inherent in the structures of many well studied protein kinase inhibitors, serves as prominent structural feature of the new compounds Concise access to the new regioisomeric tetracyclic derivatives was accomplished through amide coupling of appropriate pyrrole and indole precursors followed by an intramol. Heck coupling reaction of the intermediate amide conjugates. Preliminary evaluation of newly synthesized tetracyclic mols. against a panel of protein kinases indicated their inhibitory activities and revealed promising selectivity profiles. The new compounds displayed no significant antiproliferative activity against MCF-7 cancer cells. Derivative Et 6-oxo-4,5,6,11-tetrahydro-2H-pyrrolo[30,40:5,6]azepino[4,3b]indole-1-carboxylate exhibited selective TAK1 kinase inhibitory activity and figures as a promising chemotype for the discovery of new TAK1 inhibitors.

Tetrahedron published new progress about Heck reaction. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, Recommanded Product: Ethyl 5-formyl-1H-pyrrole-2-carboxylate.

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

Booth, Paul M.; Fox, Christina M. J.; Ley, Steven V. published the artcile< Regiospecific alkylation of β-keto thio esters and use in the synthesis of acyltetronic acids>, Synthetic Route of 617-55-0, the main research area is carolic acid; carlosic acid; acetothioacetate alkylation; carbonyl acetothioacetate.

Anions of Me3CSCOCH2COMe react with alkyl halides and carbonyl compounds in a regiospecific manner to afford products which are versatile synthetic intermediates as exemplified by short syntheses of the mold metabolites carolic acid (I) and carlosic acid (II).

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

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

Galenko, Ekaterina E.; Novikov, Mikhail S.; Shakirova, Firuza M.; Shakirova, Julia R.; Kornyakov, Ilya V.; Bodunov, Vladimir A.; Khlebnikov, Alexander F. published the artcile< Isoxazole Strategy for the Synthesis of 2,2'-Bipyridine Ligands: Symmetrical and Unsymmetrical 6,6'-Binicotinates, 2,2'-Bipyridine-5-carboxylates, and Their Metal Complexes>, Category: esters-buliding-blocks, the main research area is sym binicotinate bipyridine carboxylate metal complex preparation; unsym binicotinate bipyridine carboxylate metal complex preparation.

An effective strategy was developed for the synthesis of new 2,2′-bipyridine ligands, sym. and unsym. 6,6′-binicotinates, and 2,2′-bipyridine-5-carboxylates, from 4-propargylisoxazoles. The synthesis of sym. 2,2′-disubstituted 6,6′-binicotinates was achieved using the Eglinton reaction of 5-methoxy-4-(prop-2-yn-1-yl)isoxazoles with Cu(OAc)2, followed by Fe(NTf2)2/Au(NTf2)tBuXPhos-catalyzed isomerization of the so-formed mixture of isoxazole/azirine-substituted biacetylenic intermediates. Unsym. 2,2′-disubstituted 6,6′-binicotinates were prepared via a copper-free Sonogashira coupling of 5-methoxy-4-(prop-2-yn-1-yl)isoxazoles with 6-bromonicotinates to give Me 6-(3-(5-methoxyisoxazol-4-yl)prop-1-ynyl)pyridine-3-carboxylates, followed by a transformation of the propargylisoxazole moiety of the adduct into the pyridine fragment under Fe(II)/Au(I) relay catalysis conditions. 6-(Pyrid-2-yl)nicotinates were synthesized by a Stille-type coupling of 2-(tributylstannyl)pyridine with 6-bromonicotinates. Several cyclopalladated complexes of a new series of 6,6′-binicotinates and 2,2′-bipyridine-5-carboxylates and the homoleptic Cu(I) complex were synthesized in high yields.

Journal of Organic Chemistry published new progress about Crystal structure. 33402-75-4 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO2, Category: esters-buliding-blocks.

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

Bray, Brian L.; Hess, Petr; Muchowski, Joseph M.; Scheller, Markus E. published the artcile< Lithiated azafulvenes by halogen-metal interchange of brominated 6-(diisopropylamino)-1-azafulvene derivatives. Novel synthesis of 5-mono- and 4,5-disubstituted 1H-pyrrole-2-carboxaldehydes>, Related Products of 7126-50-3, the main research area is bromoaminoazafulvene lithiation substitution electrophile; lithioazafulvene preparation substitution electrophile; pyrrolecarboxaldehyde derivative; azafulvene bromo diisopropylamino lithiation reaction.

The 1st known lithiated 1-azafulvene derivatives were generated by low-temperature Br-Li exchange with Me3CLi of bromo(diisopropylamino)azafulvenes I (R = H, Br). Reaction of the lithiated intermediates with electrophiles (e.g., MeI, Me2NCHO) gave products which, upon hydrolysis, were converted to pyrrolecarboxaldehydes, e.g., II (R1 = Me, HCO, R2 = H; R1 = HCO, R2 = Me).

Helvetica Chimica Acta published new progress about Nucleophilic substitution reaction. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, Related Products of 7126-50-3.

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

Rotzoll, Nina; Dunkel, Andreas; Hofmann, Thomas published the artcile< Activity-Guided Identification of (S)-Malic Acid 1-O-D-Glucopyranoside (Morelid) and γ-Aminobutyric Acid as Contributors to Umami Taste and Mouth-Drying Oral Sensation of Morel Mushrooms (Morchella deliciosa Fr.)>, COA of Formula: C6H10O5, the main research area is morelid malate glycoside umami morel mushroom Morchella GABA.

Taste activity-guided fractionation of an aqueous morel extract by means of the recently developed taste dilution anal. (TDA) enabled the localization of several umami-like-tasting fractions as well as a fraction imparting an intense mouth-drying sensation to the oral cavity. Hydrophilic interaction liquid chromatog. (HILIC), LC-MS, and amino acid anal. led to the successful identification of γ-aminobutyric acid as the chem. inducer of the mouth-drying and mouth-coating oral sensations imparted by the morel extract Besides the well-known umami-like taste contributors L-glutamic acid, L-aspartic acid, and succinic acid, an addnl. HILIC fraction was isolated and evaluated as tasting umami-like. LC-MS and NMR studies revealed that this fraction consisted of a mixture of (S)-malic acid 1-O-α-D-glucopyranoside and (S)-malic acid 1-O-β-D-glucopyranoside, the structure of which could be successfully confirmed by independent synthesis. To the best of our knowledge, this morel-derived glycoside, named (S)-morelid, has previously not been reported in any food products. Sensory anal. of aqueous solutions of the compounds identified revealed threshold concentrations of 0.02 mmol/L for the mouth-drying effect of γ-aminobutyric acid and 6.0 mmol/L for the umami-like, slightly sour taste of (S)-morelid.

Journal of Agricultural and Food Chemistry published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, COA of Formula: C6H10O5.

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