Esters-buliding-blocks

Kawamorita, Soichiro published the artcileDirected Ortho Borylation of Functionalized Arenes Catalyzed by a Silica-Supported Compact Phosphine-Iridium System, Recommanded Product: Methyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trifluoromethyl)benzoate, the publication is Journal of the American Chemical Society (2009), 131(14), 5058-5059, database is CAplus and MEDLINE.

An immobilized monophosphine-Ir system, which was prepared in situ from [Ir(OMe)(cod)]₂ and a silica-supported, compact phosphine, showed high activities and selectivities for the borylation of aromatic C-H bonds with bis(pinacolato)diboron. This system was effective not only for the borylation of benzene but also for the ortho borylation of arenes with directing groups, such as ester, amide, sulfonate, acetal, alkoxymethyl, and chloro groups, under mild reaction conditions.

Journal of the American Chemical Society published new progress about 1146214-86-9. 1146214-86-9 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Methyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trifluoromethyl)benzoate, and the molecular formula is C15H18BF3O4, Recommanded Product: Methyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trifluoromethyl)benzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Takeuchi, Seiji published the artcileEnantioselective protonation of samarium enolates by a C₂-symmetric chiral diol, HPLC of Formula: 5340-78-3, the publication is Tetrahedron: Asymmetry (1994), 5(9), 1763-80, database is CAplus.

High enantioselectivity (up to 97% ee) has been achieved in the protonation of samarium enolates which were generated by SmI₂-mediated cross-coupling reaction between unsym. dialkylketenes and allyl iodide, using C₂-sym. chiral diol (S,S)-o-C₆H₄(CH₂OCH₂CHPhOH)₂ as a proton source. The stereochem. of enolate formation and of the enantioselective protonation is discussed.

Tetrahedron: Asymmetry published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C12H9N3O4, HPLC of Formula: 5340-78-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Mahato, Sanjit K. published the artcileIridium(III)-Catalyzed Direct Intermolecular Chemoselective α-Amidation of Masked Aliphatic Carboxylic Acids with Dioxazolones via Nitrene Transfer, Product Details of C8H14O4, the publication is ACS Catalysis (2021), 11(12), 7126-7131, database is CAplus.

The Ir(III)-catalyzed direct α-C-H amidation of imidazole-masked aliphatic carboxylic acids I [R = H, Me; R¹ = n-Bu, cyclopentylmethyl, 4-bromophenyl, 1H-indol-3-ylmethyl, etc.; RR¹ = -(CH₂)₃-, -(CH₂)₄-] with dioxazolones II (R² = n-Pr, 4-bromophenyl, 2-phenylethyl, furan-2-yl, etc.) for the preparation of amidated imidazoles III is reported. The presence of an imidazole moiety as a directing group is a key to the success of the reaction. The products III (R = H; R¹ = n-Bu; R² = Ph) can be easily converted to N-(1-oxo-1-(pentylamino)hexan-2-yl)benzamide and N-((1,1,1,3,3,3-hexafluoropropan-2-yl)oxy)benzamide in a simple procedure. The reaction shows a broad substrate scope for various substituted 2-acylimidazoles I, as well as a variety of dioxazolone derivatives II with important functional groups being tolerated. The reaction mechanism was investigated by deuterium-labeling experiments, Hammett plots, NMR, and FAB-MS, and propose the generation of an iridium nitrene intermediate.

ACS Catalysis published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Product Details of C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lee, Myongsoo published the artcileLiquid-crystalline rod-coil polymers based on poly(ethylene oxide)s and the influence of the complexation of LiCF₃SO₃ on the liquid-crystalline assembly, Formula: C15H14O3, the publication is Journal of Materials Chemistry (1996), 6(7), 1079-1086, database is CAplus.

The synthesis and characterization of rod-coil polymers of Et 4′-(4′-oxy-4-biphenylcarbonyloxy)-4-biphenylcarboxylate with PEO of 3 , 7, 12 and 16 (A16) ethylene oxide units, of 4′-(4′-oxy-4-phenylcarbonyloxy)-4-biphenylcarboxylate with PEO of 16 units, and of Et 4′-oxy-4-biphenylcarboxylate with PEO of 16 ethylene oxide units are described. All the rod-coil polymers except the one with 16 units display a layered smectic mesophase and, in particular, A16 shows a microphase separated morphol. The complexes of A16 with ≤0.3 mol of LiCF₃SO₃ per mol. of ethylene oxide units are also prepared The rod-coil polymer A16 exhibits an enantiotropic smectic A mesophase in addition to an smectic A phase. In contrast with the complexes with 0.01-0.1 mol of LiCF₃SO₃, the complexes with 0.2 and 0.3 mol do not exhibit any smectic mesophases; however, they display a cylindrical micellar mesophase.

Journal of Materials Chemistry published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Formula: C15H14O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Otsu, Takayuki published the artcileSolid-phase block copolymer synthesis by the iniferter technique, Application of Benzyl diethylcarbamodithioate, the publication is Macromolecules (1986), 19(7), 2087-9, database is CAplus.

The synthesis of pure block copolymers free from homopolymer was attempted by using diethyldithiocarbamate derivatives attached to a dense polystyrene  [9003-53-6]el through a hydrolyzable ester spacer as a solid photoiniferter. The photopolymerization of styrene proceeded via a living radical mechanism, i.e., both yield and mol. weight of the polystyrene isolated by hydrolysis increased with increased reaction time. Repeated photopolymerization of vinyl monomers and solvent-extraction of the homopolymers produced, followed by hydrolysis, gave the pure triblock copolymers.

Macromolecules published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Application of Benzyl diethylcarbamodithioate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ohno, Tomoyasu published the artcileSynthesis and structure-activity relationship of 4-substituted benzoic acids and their inhibitory effect on the biosynthesis of fatty acids and sterols, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, the publication is Archiv der Pharmazie (Weinheim, Germany) (2005), 338(4), 147-158, database is CAplus and MEDLINE.

The synthesis of 4-[3-(substituted phenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acids and their inhibitory effects on the biosynthesis of fatty acids and sterols is described. IC₅₀ values in vitro were 10^-6 and 10^-5 M, resp. Though the in vitro inhibitory activity of all these compounds toward sterol biosynthesis was inferior to that of pravastatin, several compounds had a stronger reducing effect in Sprague-Dawley (SD) rat on both, cholesterol (TC) and triglyceride (TG), than pravastatin and bezafibrate. The potent compounds were present at high concentrations in rat liver. The enantiomers of the potent racemic compound (4-[3-(4-bromo-2-fluorophenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acid) were prepared and their activity was examined in vivo and in vitro. In vivo, each enantiomer possessed more activity than the racemic compound Further, in Watanabe hereditable hyperlipidemic (WHHL) rabbit, optically active (R)-4-[3-(4-bromo-2-fluorophenyl)-2-oxo-5-oxazolidinyl]methoxybenzoic acid also potently reduced the effect of both TC and TG on serum levels, compared with pravastatin and bezafibrate.

Archiv der Pharmazie (Weinheim, Germany) published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C9H9NO6S, Name: (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Alam, Zahangir Md. published the artcileSynthesis of azobenzene-functionalized two-arm, three-arm and four-arm telomers using polyfunctional chain transfer agents, Formula: C23H28N2O4, the publication is Polymer International (2009), 58(11), 1308-1313, database is CAplus.

BACKGROUND: Star-shaped polymers are very attractive because of their interesting properties such as reduced viscosity, good solubility, low glass transition temperature and fast response to external stimuli. The incorporation of azobenzene moieties in star-shaped polymers could significantly widen their potential applications in various optical devices. One of the most important properties of the azobenzene chromophore is its reversible trans-cis photoisomerization induced by UV or visible light. Photoisomerization induces conformational changes in azopolymer chains, which in turn lead to macroscopic variations in chem. and phys. properties of the surroundings and media. RESULTS: This study reports the synthesis of azobenzene-functionalized two-, three- and four-arm telomers via free radical telomerization using the di-, tri- and tetrafunctional chain transfer agents 1,2- and 1,4-benzenedimethanethiol, trimethylolpropane-tris(2-mercaptoacetate) and pentaerythritol-tetrakis(3-mercaptopropionate), resp., in the presence of azobisisobutyronitrile. Azotelomers were characterized using gel permeation chromatog. and ¹H NMR and Fourier transform IR spectroscopy. Thermal phase transition behaviors were investigated using differential scanning calorimetry and polarized optical microscopy. Azotelomers synthesized in this study showed reversible photoisomerization and a fast generation of birefringence. CONCLUSION: Considering the photoisomerization behavior and birefringence of the two-, three- and four-arm azotelomers, it can be concluded that they could be potential candidates for use in various optical devices. Copyright © 2009 Society of Chem. Industry.

Polymer International published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Formula: C23H28N2O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ohtake, Toshihiro published the artcileLiquid-Crystalline Complexes of Mesogenic Dimers Containing Oxyethylene Moieties with LiCF₃SO₃: Self-Organized Ion Conductive Materials, SDS of cas: 50670-76-3, the publication is Chemistry of Materials (2000), 12(3), 782-789, database is CAplus.

Mesomorphic dimeric compounds consisting of rigid mesogenic cores and flexible oxyethylene chains have been prepared as liquid-crystalline materials capable of complexing with ionic species. The incorporation of LiCF₃SO₃ into these materials results in the induction of smectic A phases and significant mesophase stabilization. The ion-dipole interactions between lithium ions and oxyethylene moieties have stabilized the mesomorphic layer structures. Ionic conductivities have been measured for the complexes forming homeotropically aligned mol. orientation of smectic phases. The highest value of conduction, which is observed for the direction parallel to the layer in the smectic A phase, is 5.5 × 10^-4 S cm^-1. These results suggest that the complexes of LiCF₃SO₃ with mesogenic rod-coil-rod mols. containing oxyethylene chains can function as self-organized ion conductive materials.

Chemistry of Materials published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, SDS of cas: 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Senda, Taichi published the artcileRhodium-Catalyzed Asymmetric 1,4-Addition of Organoboron Reagents to 5,6-Dihydro-2(1H)-pyridinones. Asymmetric Synthesis of 4-Aryl-2-piperidinones, HPLC of Formula: 126613-06-7, the publication is Journal of Organic Chemistry (2001), 66(21), 6852-6856, database is CAplus and MEDLINE.

Catalytic asym. synthesis of 4-aryl-2-piperidinones was realized by asym. 1,4-addition of arylboron reagents to 5,6-dihydro-2(1H)-pyridinones in the presence of a chiral bisphosphine-rhodium catalyst. In the reaction introducing the 4-fluorophenyl group, the use of 4-fluorophenylboroxine and 1 equiv (to boron) of water at 40°C gave the highest yield of the arylation product with high enantioselectivity (98% ee). The (R)-4-(4-fluorophenyl)-2-piperidinone obtained is a key intermediate for the synthesis of (-)-Paroxetine.

Journal of Organic Chemistry published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C7H13NO2, HPLC of Formula: 126613-06-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Woeste, Thorsten H. published the artcileBINAP versus BINAP(O) in Asymmetric Intermolecular Mizoroki-Heck Reactions: Substantial Effects on Selectivities, Related Products of esters-buliding-blocks, the publication is Chemistry – A European Journal (2011), 17(42), 11914-11918, S11914/1-S11914/25, database is CAplus and MEDLINE.

(R)-2,2′-Bis(diphenylphosphino)-1,1′-binaphthyl (BINAP) I (R = Ph₂P) and its monophosphine oxide (R)-BINAPO I [R = Ph₂P(:O)] were prepared and compared as ligands in the Mizoroki-Heck reactions of 2,3-dihydrofuran and cyclopentene with Ph triflate and iodobenzene in the presence of Pd(OAc)₂ and Pd₂(dba)₃·dba [dba = (E,E)-dibenzylideneacetone]. The regio- and enantioselectivity of the phenylation of 2,3-dihydrofuran and cyclopentene changed dramatically in the presence of hemilabile BINAP(O) instead of BINAP. The phenylation of 2,3-dihydrofuran gave different regioisomers with nearly complete selectivity when BINAP and BINAPO were used; phenylation of 2,3-dihydrofuran using BINAPO gave (R)-2-phenyl-2,5-dihydrofuran with 98:2 regioselectivity in 18-92% ee, while the use of BINAP as ligand gave (R)-5-phenyl-2,3-dihydrofuran exclusively in 16-80% ee. The phenylation of cyclopentene was more regioselective when BINAPO was used as the ligand than when BINAP was used; the reaction gave product in significantly higher enantioselectivity with BINAP(O) (60% ee) than with BINAP (10% ee). The use of Pd₂(dba)₃·dba instead of Pd(OAc)₂ as the palladium source produced enantioselectivities as high as 86% ee in the phenylation of cyclopentene.

Chemistry – A European Journal published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C7H13ClNNaO5S, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics