Tag: M.W=150-200

Han, Lei; Gan, LinLing; Hu, Xiangnan; Li, Wei; Zhu, Dali; Zheng, Jiecheng; Wu, Yue; Yu, Yu; Gan, Zongjie published the artcile< Cu(OAc)2 Mediated mild synthesis of 2-aminobenzimidazoles and 2-aminobenzoxazoles>, HPLC of Formula: 19241-24-8, the main research area is aminobenzimidazole preparation; phenylenediamine isothiocyanate desulfurization copper acetate desulfurization agent; aminobenzoxazole preparation; aminophenol isothiocyanate desulfurization copper acetate desulfurization agent.

An efficient and facile synthesis for 2-aminobenzimidazoles I [R1 = H, 6-Me, 6-OMe, etc.; R2 = C6H5, 2-MeC6H4, 2-ClC6H4, etc.] and 2-aminobenzoxazoles II [R1 = H, Me, Cl; R2 = C6H5, 4-ClC6H4] was reported. Thioureas prepared from the reaction of o-phenylenediamines or 2-aminophenols and isothiocyanate derivatives, underwent desulfurization reaction smoothly under mild conditions in the presence of Cu(OAc)2 and afforded a variety of N-heterocyclic compounds in moderate to good yields.

Synthetic Communications published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 19241-24-8 belongs to class esters-buliding-blocks, and the molecular formula is C11H13NS, HPLC of Formula: 19241-24-8.

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

Bakaraki Turan, Nouha; Zaman, Buse T.; Arvas, Busra; Yolacan, Cigdem; Bakirdere, Sezgin published the artcile< Implementation of a spraying-assisted fine droplet formation-based simultaneous liquid-phase microextraction method for the determination of copper in clove extract samples>, Category: esters-buliding-blocks, the main research area is simultaneous liquid phase microextraction copper clove extract spraying apparatus.

A simultaneous liquid-phase microextraction method was investigated as an alternative to the traditional dispersive liquid-liquid microextraction for the determination of copper. The potential of this approach is based on the simultaneous complexation and extraction process (SCE) using an innovative spraying apparatus forming finer droplets. Method optimization was performed after ensuring the complexation of copper with a novel ligand, namely 8-(1,3-dihydroxy-1-phenylpropan-2-ylimino)methyl)-7-hydroxy-4-phenyl-2H-chromen-2-one ligand with respect to the conventional FAAS system; the detection power of the new developed system (spraying-assisted fine droplet formation-based simultaneous liquid-phase microextraction-slotted quartz tube-flame at. absorption spectrometry, SAFDF-SLPME-SQT-FAAS) was about 33.8. The quantification and detection values were calculated to be 8.7 and 2.6 μg L-1. Recovery studies were tested in clove extract samples. Obtained percent recoveries were between 96.0 and 103.3% highlighting the applicability and the accuracy of the developed method.

Chemical Papers published new progress about Drops. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Category: esters-buliding-blocks.

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

Farnier, M.; Drakenberg, T. published the artcile< Nuclear magnetic resonance conformational studies of C-substituted formylpyrroles. I. Substituent effects on aldehyde conformations as shown by long range coupling constants>, HPLC of Formula: 7126-50-3, the main research area is formylpyrrole conformation NMR; pyrrole formyl conformation NMR; substituent effect conformation formylpyrrole; solvent effect conformation formylpyrrole.

The substituent effects on the conformation of the CHO group of 2- and 3-formylpyrroles and their NO2, I, EtO2C, and CHO derivatives were studied by measuring the 5J and 4J long-range coupling constants The solvent effect was also studied for several mols., increasing polarity of the solvent causing an increase in the proportion of trans conformer. This was probably due to a reduction in intramol. H bonding between NH and CO relative to intermol. interactions.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about Formyl group. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, HPLC of Formula: 7126-50-3.

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

Gok, Dervis published the artcile< One-pot three-component synthesis of novel 2-(3-nitro-phenyl)-quinazoline-4-carboxylic acid derivatives>, Recommanded Product: Ethyl 3-oxo-3-phenylpropanoate, the main research area is quinazoline carboxylic acid preparation; nitro phenyl quinazoline carboxylic acid preparation; sodium isatinate nitrobenzaldehyde ammonium acetate three component.

A simple and easy synthesis of compound I [R1 = HO; R2 = 3-O2NC6H4] was successfully developed through a one-pot three-component condensation reaction of (2-amino-phenyl)-oxo-acetic acid sodium salt obtained from the hydrolysis of isatin with ammonium acetate and 3-nitrobenzaldehyde. Some novel quinazoline-ester derivatives I [R1 = MeO, EtO, i-PrO, BuO; R2 = 3-O2NC6H4] were then obtained by the reaction between the new compound I [R1 = H; R2 = 3-O2NC6H4] and various alcs. Then, quinazoline-amide derivatives I [R1 = H2N, n-PrNH, i-PrNH, PhNH, 4-H2NSO2C6H4NH; R2 = 3-O2NC6H4] were synthesized from the reaction of various amines and compound I [R1 = Cl; R2 = 3-O2NC6H4], obtained by the reaction of compound I [R1 = HO; R2 = 3-O2NC6H4] with SOCl2. Finally, some novel quinazoline-azo derivatives II [R3 = Me, Ph; R4 = Me, EtO] were synthesized by the coupling reaction between β-dicarbonyl compounds and the novel amino-quinazoline derivative compound I [R1 = n-PrNH; R2 = 3-H2NC6H4], obtained by reduction of nitro-quinazoline derivative compound I [R1 = n-PrNH; R2 = 3-O2NC6H4]. Thus, a new series of quinazoline-4-carboxylic acid, ester, amide and azo derivatives was synthesized and fully characterized by 1H NMR, 13C NMR, IR and mass spectrometry anal.

Journal of Heterocyclic Chemistry published new progress about Carboxylic acids Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Recommanded Product: Ethyl 3-oxo-3-phenylpropanoate.

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

Izquierdo, Isidoro; Plaza, Maria T.; Robles, Rafael; Mota, Antonio published the artcile< Synthesis of 4-octuloses. Part IV. Synthesis of 2-deoxy-4-octulose derivatives by highly diastereoselective alkylations of protected hexuloses>, COA of Formula: C6H10O5, the main research area is arabinohexosulopyranose xylohexosulofuranose Reformatskii reaction bromoacetate; deoxyoctulose preparation stereoselective alkylation.

Reformatskii reaction of 2,3:4,5-di-O-isopropylidene-β-D-arabino-hexos-2-ulopyranose with Me bromoacetate proceeded with high diastereoselectivity to give Me 2-deoxy-4,5:6,7-di-O-isopropylidene-β-D-manno-oct-4-ulo-4,8-pyranosonate and its -D-gluco isomer, in an ≈ 10:1 ratio. Configurations of the new stereogenic centers (C-3) were determined by reduction of their ester groups to the related 2-deoxy-4,5:6,7-di-O-isopropylidene-β-D-manno- and -D-gluco-oct-4-ulo-4,8-pyranose. When alkylation at C-1 was carried out with 2-lithio tert-Bu acetate, the corresponding tert-Bu esters were formed in an ≈ 5.4:1 ratio. The stereochem. of the esters was established by their reductions On the other hand, reaction of 2,3:4,5-di-O-isopropylidene-β-D-arabino-hexos-2-ulopyranose with Me methoxycarbonylmethylenedimethylsulfurane gave only Me 2,3-anhydro-4,5:6,7-di-O-isopropylidene-β-D-glycero-D-galacto-oct-4-ulo-4,8-pyranosonate. Reformatskii reaction of 2,3:4,6-di-O-isopropylidene-α-L-xylo-hexos-2-ulofuranose with Me bromoacetate proceeded with moderate diastereoselectivity to give Me 2-deoxy-4,5:6,8-di-O-isopropylidene-α-L-gulo-oct-4-ulo-4,7-furanosonate and its -L-ido isomer, in an ≈ 3.5:1 ratio. Configuration of the new stereogenic center (C-3) was determined by degradation to the known di-Me D-methoxymalate.

Tetrahedron: Asymmetry published new progress about Alkylation, stereoselective. 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

Jiang, Qiuxia; Li, Anquan; Liu, Xiang; Yu, Yue; Zhu, Baofu; Cao, Hua published the artcile< Lewis Acid-Catalyzed Synthesis of Polysubstituted Furans from Conjugated Ene-yne-ketones and 1,3,5-Triazinanes>, SDS of cas: 94-02-0, the main research area is furan preparation green chem regioselective; conjugated ene yne ketone triazinane bond formation.

An efficient and metal-free approach to the construction of diverse functionalized furan derivatives has been developed from ene-yne-ketones and 1,3,5-triazinanes. As an atom-economical and environmentally-friendly protocol, the new conditions are suitable for selective C-N and C-O bond formation of a wide range of polysubstituted furans in one pot.

Journal of Organic Chemistry published new progress about C-N bond formation. 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

Felpin, Francois-Xavier; Ibarguren, Oier; Nassar-Hardy, Luma; Fouquet, Eric published the artcile< Synthesis of Oxindoles by Tandem Heck-Reduction-Cyclization (HRC) from a Single Bifunctional, in Situ Generated Pd/C Catalyst>, Reference of 30095-98-8, the main research area is methyl nitroaryl acetate formaldehyde methylenation; nitroaryl acrylate preparation aromatic diazonium salt hydrogen reusable palladium; Heck reduction cyclization arylmethyl oxindole preparation; catalyst Heck reduction cyclization reusable palladium.

A tandem sequence involving palladium-catalyzed sequential Heck-reduction-cyclization transformations in mild conditions has been developed for the synthesis of oxindoles, e.g., I. The protocol involves inexpensive reagents and does not require any additives such as base or ligands.

Journal of Organic Chemistry published new progress about Carboxylic esters Role: RCT (Reactant), RACT (Reactant or Reagent) (nitroaralkyl). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Reference of 30095-98-8.

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

Lee, Sangku; Lim, Hee-Jong; Cha, Kobpurn Lulu; Sulikowski, Gary A. published the artcile< Asymmetric approaches to 1,2-disubstituted mitosenes based on the intramolecular cyclization of diazoesters>, Related Products of 30095-98-8, the main research area is mitosene antitumor antibiotic asym synthesis; intramol cyclization diazoester chiral copper catalyst; mitomycin ring system asym synthesis.

A strategy for the asym. synthesis of 1,2-disubstituted mitosenes is described. The key reaction is the decomposition of a meso diazoester in the presence of chiral copper(I) catalysts. Cyclization of diazoesters derived from (1R,2S,5R)-menthol and (R)-pantolactone provide optically pure 1,2-disubstituted mitosenes, e.g. I (R = α-, β-CO2Me; R1 = α-, β-H) following oxidation and purification by flash chromatog.

Tetrahedron published new progress about Antitumor antibiotics. 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

Tayone, Wilanfranco Caballero; Shindo, Saori; Murakami, Takanori; Hashimoto, Masaru; Tanaka, Kazuaki; Takada, Noboru published the artcile< Absolute stereochemistry and conformational analysis of achaetolide isolated from Ophiobolus sp.>, COA of Formula: C6H10O5, the main research area is Ophiobolus achaetolide absolute stereochem conformation analysis isolation.

Achaetolide (I), as reported by Bodo et al. in 1983, was isolated from a fermentation broth of Ophiobolus sp. We established the absolute stereochem. of achaetolide to be 3S,6R,7S,9R by way of relative stereochem. assignment with 1H NMR analyses employing the corresponding acetonide, determination of C3 and C9 stereochemistries by an extended Mosher method.

Tetrahedron published new progress about Absolute configuration. 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

Praveen, Aletti S.; Yathirajan, Hemminge S.; Narayana, Badiadka; Sarojini, Balladka K. published the artcile< Synthesis and spectroscopic characterization of some novel Schiff bases of benzylidene derivatives>, Formula: C9H9NO4, the main research area is benzylidene Schiff base preparation.

A series of Schiff bases I (R1 = 3-Me, 4-Me, 4-MeO, 4-EtO, 2-O2N; R2 = H, 4-CN, 4-F, 4-MeO) have been synthesized by treatment of 2-(substituted phenyl)acetohydrazides with few benzaldehyde derivatives

Pharma Chemica published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Formula: C9H9NO4.

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