Category: 94-02-0

O’Mahony, Rosella M.; Broderick, Caoimhe M.; Lynch, Denis; Collins, Stuart G.; Maguire, Anita R. published the artcile< Synthesis and use of a cost-effective, aqueous soluble diazo transfer reagent - m-carboxybenzenesulfonyl azide>, SDS of cas: 94-02-0, the main research area is synthesis use water soluble diazo transfer reagent carboxybenzenesulfonyl azide.

Herein, we report the preparation and use of m-carboxybenzenesulfonyl azide as a diazo transfer reagent. This compound is an inexpensive and potentially scalable alternative to many of the diazo transfer reagents currently available, most of which have hazards associated with their use. Its usefulness and suitability as a diazo transfer reagent was assessed on the basis of cost, safety and its effectiveness in diazo transfer to a variety of different substrates.

Tetrahedron Letters published new progress about Diazo transfer reaction. 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

Kazmierczak, Jean C.; Cargnelutti, Roberta; Barcellos, Thiago; Silveira, Claudio C.; Schumacher, Ricardo F. published the artcile< Selective synthesis of α-organylthio esters and α-organylthio ketones from β-keto esters and sodium S-organyl sulfurothioates under basic conditions>, Formula: C11H12O3, the main research area is alpha organylthio ester preparation; preparation alpha organylthio ketone; beta keto ester sodium organyl sulfurothioate CS bond formation; Bunte salts; C–C bond cleavage; α-alkylthio esters; α-alkylthio ketones; β-keto esters.

A selective method to prepare α-organylthio esters RSCH2C(O)OR1 [R = (CH2)3CH3, Bn, 4-MeC6H4CH2, etc.; R1 = Me, Et, cyclohexyl, etc.] and α-organylthio ketones R2C(O)CH2SCH2R3 [R2 = Me, Ph; R3 = Bn, 2-MeC6H4CH2, 2-ClC6H4CH2, 4-ClC6H4CH2, 4-F3CC6H4CH2] by the reaction of β-keto esters with sodium S-benzyl sulfurothioate or sodium S-alkyl sulfurothioate (Bunte salts) under basic conditions in toluene as the solvent at 100°C was developed. When 4 equiv of a base were used, a series of differently substituted α-thio esters were obtained with up to 90% yield. On the other hand, employing 2 equiv of a base, α-thio ketones were achieved after 18 h under air. Furthermore, after a shorter reaction time, the isolation of keto-enol tautomers was possible, revealing them as significant intermediates for the mechanism elucidation.

Beilstein Journal of Organic Chemistry published new progress about C-C bond cleavage. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Formula: C11H12O3.

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

Feng, Peng-Fei; Kong, Meng-Ya; Yang, Yi-Wei; Su, Ping-Ru; Shan, Chang-Fu; Yang, Xiao-Xi; Cao, Jing; Liu, Wei-Sheng; Feng, Wei; Tang, Yu published the artcile< Eu2+/Eu3+-Based Smart Duplicate Responsive Stimuli and Time-gated Nanohybrid for Optical Recording and Encryption>, Reference of 94-02-0, the main research area is europium smart duplicate responsive stimulus nanohybrid optical recording encryption; duplicato-responsive; in situ coordination; nanohybrid; optical recording and encryption; variable valence europium.

With the rapid development of information science, it is urgent that memory devices possessing high security, d., and desirable storage ability should be developed. A smart duplicate response of stimuli was developed and a time-gate nanohybrid based on variable valence Eu2+/Eu3+ coencapsulated was fabricated and acts as active material in the multilevel and multidimensional memory devices. The luminescence lifetime of Eu3+ in this nanohybrid gave a stimuli response due to which the energy level of the coordinated ligand could be modulated. By a simple sintering procedure, Eu3+ was partially in situ reduced to Eu2+ with a short lifetime in the system. And the in situ reduction ensured both Eu3+ and Eu2+ ions’ uniform distribution in the nanohybrid and simultaneous response upon light excitation of variable valence Eu ions. Eu3+ revealed a prolonged lifetime because of the presence of an energy-transfer effect of Eu2+ → Eu3+. Such a nanohybrid had abundant luminescent properties, including the short lifetime of Eu2+, the energy transfer from the Eu2+ to Eu3+ ions, and the stimuli response of the Eu3+ lifetimes when exposed to acidic or basic vapor, thus giving birth to interesting recording and encryption performance in spatial-temporal dimensions. Probably this research will point out a new direction for the future development of multilevel and multidimensional optical recording and encryption materials.

ACS Applied Materials & Interfaces published new progress about Coded information. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Reference of 94-02-0.

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

Hong, Chao; Yu, Shuling; Liu, Zhanxiang; Zhang, Yuhong published the artcile< Rh-Catalyzed Coupling of Acrylic/Benzoic Acids with α-Diazocarbonyl Compounds: An Alternative Route for α-Pyrones and Isocoumarins>, Formula: C11H12O3, the main research area is alkyl oxo aryl pyran carboxylate preparation; acrylic acid alpha diazocarbonyl compound coupling catalyst rhodium; isochromene alkyl oxo carboxylate preparation; aryl carboxylic acid alpha diazocarbonyl compound coupling catalyst rhodium.

A coupling of acrylic acids/benzoic acids with α-diazocarbonyl compounds had been realized by a combined catalytic system of rhodium catalyst and Zn(OAc)2 additive. The presence of Zn(OAc)2 obviously accelerates the C(sp2)-H activation and destructed the formation of carboxylic ester that was formed via a nucleophilic O-H insertion to metal carbenoid. The procedure featured mild reaction conditions and broad substrate scope, providing a straightforward approach to the synthesis of α-pyrones I [R1 = Me, Ph, Bn, etc.; R2 = H, Me, Ph; R1R2 = (CH2)4; R3 = Me, Et, allyl, t-Bu, R4 = Me, Et, Ph, etc.] and isocoumarins II [R = H, 8-Me, 8-Me-6-MeO, etc.] without the transformation of carboxylic acids to the corresponding amides.

Organic Letters published new progress about 1,3-Dicarbonyl compounds 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, Formula: C11H12O3.

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

Loro, Camilla; Molteni, Letizia; Papis, Marta; Lo Presti, Leonardo; Foschi, Francesca; Beccalli, Egle M.; Broggini, Gianluigi published the artcile< Non-Decarboxylative Ruthenium-Catalyzed Rearrangement of 4-Alkylidene-isoxazol-5-ones to Pyrazole- and Isoxazole-4-carboxylic Acids>, Safety of Ethyl 3-oxo-3-phenylpropanoate, the main research area is pyrazole carboxylic acid preparation; hydroaminoalkylidenyl isoxazolone rearrangement ruthenium catalyst; isoxazole carboxylic acid preparation; hydroxyalkylidenyl isoxazolone rearrangement ruthenium catalyst.

Non-decarboxylative ruthenium-catalyzed rearrangement of 4-(2-hydroaminoalkylidenyl)- and 4-(2-hydroxyalkylidenyl)-substituted isoxazol-5(4H)-ones with catalytic amounts of [RuCl2(p-cymene)]2, without any additive, afforded pyrazole-4-carboxylic acids I [R1 = Me, Pr, Ph, etc.; R2 = H, Me, Et, etc.; R3 = Ph, CH2Bn, etc.] and isoxazole-4-carboxylic acids I [R1 = Me, Pr, Ph, etc.; R2 = H, Me, Ph, etc.] resp. The presence of an intramol. H-bond in these substrates was the key to divert the classical mechanism toward a ring-opening non-decarboxylative path that was expected to generate a vinyl Ru-nitrenoid intermediate, the cyclization of which afforded the rearranged products I and II. A gram scale protocol demonstrated the synthetic applicability of this transformation.

Organic Letters published new progress about Alkylidenes 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, Safety of Ethyl 3-oxo-3-phenylpropanoate.

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

Zhulanov, Vladimir E.; Vigovskaya, Valeria A.; Dmitriev, Maksim V.; Silaichev, Pavel S.; Maslivets, Andrey N.; Rubin, Michael published the artcile< Dipyrazolodioxadiazocines as shelf-stable ""ready-to-use"" precursors for an in situ generation of enolate-iminium 1,4-dipoles: a straightforward atom-economical approach to pyrazolo[5,1-d][1,3,5]dioxazines>, HPLC of Formula: 94-02-0, the main research area is pyrazolodioxazine preparation atom economy; dipyrazolodioxadiazocine ketone heterocyclization insitu generated cyclic enolate iminium dipole.

An original, facile and highly efficient method for the in situ generation of cyclic enolate-iminium 1,4-dipoles via unique thermal decomposition of easily available dipyrazolodioxadiazocines was developed. Various substituted pyrazolo[5,1-d][1,3,5]dioxazines I [R1 = COOEt, PhCO, 4-MeC6H4CO, 4-ClC6H4CO; R2 = CO2Me, Ph; R3 = Me, Et; R4 = Et, t-Bu, n-Bu, i-Bu, Bn; R3R4 = (CH2)4, (CH2)5, (CH2)6, etc.] were prepared in high yields via unusual cycloconversion of dipyrazolodioxadiazocines in the presence of ketones. Furthermore, the developed method was 100% atom economical and proceeds under metal-, catalyst- and solvent-free conditions.

Organic & Biomolecular Chemistry published new progress about Atom economy. 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

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

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

Benouatas, Assia; Laroum, Rima; Hamdouni, Noudjoud; Zemamouche, Wissame; Debache, Abdelmadjid; Boudjada, Ali published the artcile< Structural study and Hirshfeld surface analysis of (Z)-4-(2-methoxybenzylidene)-3-phenylisoxazol-5(4H)-one>, COA of Formula: C11H12O3, the main research area is methoxybenzylidene phenylisoxazolone hirshfeld surface hydrogen bond crystal structure; Hirshfeld surface analysis; crystal structure; hydrogen bonding; isoxazole; meth­oxy­benzyl­idene; π–π stacking.

The title compound, C17H13NO3, adopts a Z configuration about the C=C bond. The isoxazole and methoxybenzylidene rings are almost coplanar with a dihedral angle of 9.63 (7)° between them. In contrast, the Ph substituent is twisted significantly out of the plane of the oxazole ring, with the two rings inclined to each other by 46.22 (4)°. The crystal structure features C-H···O, C-H···N and C-H···π hydrogen bonds and π-π contacts. An anal. of the Hirshfeld surfaces points to the importance of H···H, H···C/C···H and H···O/O···H contacts. The included surface areas of the title compound were compared to those of the isomeric structure (Z)-4-(4-methoxybenzylidene)-3-phenylisoxazol-5(4H)-one [Zhang et al. (2015). CrystEngComm, 17, 7316-7322].

Acta Crystallographica, Section E: Crystallographic Communications published new progress about Crystal structure. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, COA of Formula: C11H12O3.

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

Benouatas, Assia; Laroum, Rima; Hamdouni, Noudjoud; Zemamouche, Wissame; Debache, Abdelmadjid; Boudjada, Ali published the artcile< Structural study and Hirshfeld surface analysis of (Z)-4-(2-methoxybenzylidene)-3-phenylisoxazol-5(4H)-one>, COA of Formula: C11H12O3, the main research area is methoxybenzylidene phenylisoxazolone hirshfeld surface hydrogen bond crystal structure; Hirshfeld surface analysis; crystal structure; hydrogen bonding; isoxazole; meth­oxy­benzyl­idene; π–π stacking.

The title compound, C17H13NO3, adopts a Z configuration about the C=C bond. The isoxazole and methoxybenzylidene rings are almost coplanar with a dihedral angle of 9.63 (7)° between them. In contrast, the Ph substituent is twisted significantly out of the plane of the oxazole ring, with the two rings inclined to each other by 46.22 (4)°. The crystal structure features C-H···O, C-H···N and C-H···π hydrogen bonds and π-π contacts. An anal. of the Hirshfeld surfaces points to the importance of H···H, H···C/C···H and H···O/O···H contacts. The included surface areas of the title compound were compared to those of the isomeric structure (Z)-4-(4-methoxybenzylidene)-3-phenylisoxazol-5(4H)-one [Zhang et al. (2015). CrystEngComm, 17, 7316-7322].

Acta Crystallographica, Section E: Crystallographic Communications published new progress about Crystal structure. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, COA of Formula: C11H12O3.

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