Category: 10287-53-3

Annibaletto, Julien published the artcileAmmonium Salts as Convenient Radical Precursors using Iridium Photoredox Catalysis, Category: esters-buliding-blocks, the publication is Organic Letters (2022), 24(23), 4170-4175, database is CAplus and MEDLINE.

Ammonium salts are usually considered as highly challenging to reduce into the corresponding radicals because of the strength of their carbon-nitrogen bond. Here, authors disclose that several ammonium salts can be readily activated using iridium photoredox catalysis to form radicals and illustrate the synthetic utility of this activation of strong C-N bonds with hydrodeamination reactions and radical couplings. Cyclic voltammetry was exploited to rationalize the reactivity observed for the activation of these ammonium salts.

Organic Letters published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Category: esters-buliding-blocks.

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

Cheshmedzhieva, Diana published the artcileHydrogen bonding probes electron density variations at the basic center in substituted alkyl benzoates: Theory and experiment, Formula: C11H15NO2, the publication is Journal of Physical Organic Chemistry (2021), 34(11), e4258, database is CAplus.

Theor. computations of charge d. parameters are juxtaposed to exptl. spectroscopic shifts induced by hydrogen bonding for a series of 21 substituted in the aromatic ring Et and Me benzoates. Strong correlations between at. charges at the proton accepting atom and the shifts of methanol O-H frequencies are established. Hirshfeld, Charge Model 5 (CM5), and natural population anal. (NPA) at. charges are evaluated using ωB97X-D/6-311++G(3df,2pd) and MP2/6-311++G(3df,2pd) computations. The results obtained reveal the power of hydrogen bond measurements in characterizing the variations of electron densities at the proton accepting center within a series of structurally related mols. The limits of application of the approach are outlined.

Journal of Physical Organic Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Formula: C11H15NO2.

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

Charlot, V. published the artcileInfluence of the photoinitiating system on the properties of photopolymerized methylmethacrylate: the role of the ketyl radical in type II photoinitiators, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Polymer Chemistry (2021), 12(9), 1210-1216, database is CAplus.

Three photoinitiating systems (PIS) exhibiting different photoinitiation mechanisms were used for radical photopolymerization of methylmethacrylate (MMA). Namely, a photoactive RAFT agent (N,N benzyl dimethyldithiocarbamate), a type II photoinitiating system (isopropylthioxanthone/amine) and a photocyclic initiating system (isopropylthioxanthone/amine/triazine) were compared. It is found that the type II photoinitiating system leads to relatively low M_n and D̅ values, a fact partly attributed to the ketyl radical that acts as a terminating agent. When adding a triazine derivative to this system, the PIS turns to be highly efficient. High M_n values were found and the D̅ values dramatically increased. This behavior is attributed to the disappearance of the ketyl radical by virtue of a photocycle. By contrast, the use of a photoactive RAFT agent leads to both high M_n and low D̅. These differences affect the T_g values, a fact which is highlighted when comparing the behavior of the RAFT agent with that of the photocyclic initiating system. The decrease of D̅ leads to higher T_g by avoiding the self-plasticization due to short chains.

Polymer Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

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

Zhu, Guangda published the artcileDigital Light Processing 3D Printing of Enhanced Polymers via Interlayer Welding, COA of Formula: C11H15NO2, the publication is Macromolecular Rapid Communications (2022), 43(9), 2200053, database is CAplus and MEDLINE.

Digital light processing (DLP) 3D printing is advantageous in high printing efficiency and printing resolution for fabricating complex structures across various applications. However, the layer-by-layer curing manner of DLP leads to weak interlayer adhesion and the anisotropic mech. properties of printed objects. Here, linear polymers are introduced into com. resins to weld the interlayer by the diffusion and entanglement of linear polymers after DLP printing via heat treatment. This introduction of linear polymers not only shows a strengthening and toughening effect on the printed objects, but also has no neg. impact on the DLP printability. The tensile strengths of objects containing 4.7 wt% polycaprolactone can reach up to ≈500% of that of neat samples in any printing direction. This simple strategy by adding linear polymers into printing resins provides an effective access to prepare DLP printed objects with improved mech. properties as well as ensure printing resolution and printing efficiency.

Macromolecular Rapid Communications published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C3H5BN2O2, COA of Formula: C11H15NO2.

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

Zhu, Guangda published the artcileDigital Light Processing 3D Printing of Healable and Recyclable Polymers with Tailorable Mechanical Properties, Safety of Ethyl 4-dimethylaminobenzoate, the publication is ACS Applied Materials & Interfaces (2021), 13(29), 34954-34961, database is CAplus and MEDLINE.

Three-dimensional (3D) printing is becoming a revolutionary technique across various fields. Especially, digital light processing (DLP) 3D printing shows advantages of high resolution and high efficiency. However, multifunctional monomers are commonly used to meet the rapid liquid-to-solid transformation during DLP printing, and the extensive production of unreprocessable thermosets will lead to resource waste and environmental problems. Here, we report a family of dynamic polymers with highly tailorable mech. properties for DLP printing. The dynamic polymers crosslinked by ionic bonding and hydrogen bonding endow printed objects with excellent self-healing and recycling ability. The mech. properties of printed objects can be easily tailored from soft elastomers to rigid plastics to satisfy practical applications. Taking advantage of the dynamic crosslinking, various assembling categories, including 2D to 3D, small to large 3D structures, and same to different materials assembly, and functional devices with a self-healing capacity can be realized. This study not only helps to address environmental issues caused by traditional DLP-printed thermosets but also realizes the on-demand fabrication of complex structures.

ACS Applied Materials & Interfaces published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C3H5BN2O2, Safety of Ethyl 4-dimethylaminobenzoate.

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

Palagummi, Sri Vikram published the artcileThermal shrinkage reveals the feasibility of pulse-delay photocuring technique, Formula: C11H15NO2, the publication is Dental Materials (2021), 37(12), 1772-1782, database is CAplus and MEDLINE.

To resolve the feasibility of the pulse-delay photocuring technique as a clin. strategy for reducing the detrimental polymerization stress induced in dental composites during the photocuring process.Model dental composites with high and low-filler contents were cured with the pulse-delay photocuring technique using different combinations of photocuring variables (irradiance, exposure time, and delay time). Irradiance used ranged from 0.1 W/cm² to 4 W/cm². The exposure time of the first pulse varied from 0.2 s to 27.2 s and the delay times ranged from 10 s to 120 s. The radiant exposure was varied from 4 J/cm² to 20 J/cm². A cantilever-beam based instrument (NIST Standards Reference Instrument 6005) was used to implement the photocuring technique for the measurement of the polymerization properties the degree of monomer conversion, polymerization Stress induced due to shrinkage, and temperature change due to the reaction exotherm and curing light absorbance simultaneously in real-time. These properties were compared with those obtained using the conventional photocuring technique (i.e., using a constant irradiance for a fixed exposure time, a uniform exposure).There exists a min. radiant exposure, such that a reduction In the polymerization stress can be achieved without sacrificing the degree of monomer conversion by using the pulse-delay over the conventional photocuring technique. More specifically, stress reductions of up to 19% and 32% was observed with the pulse-delay when compared with the conventional photocuring technique at an irradiance of 0.5 W/cm² and 4 W/cm², resp. The reduction occurred when the exposure time of the first pulse was greater than, but closer to, the gelation time (i.e., lower than the vitrification time) of the composite, regardless of the delay time used. Lower thermal shrinkage (contraction) during the post-curing time, rather than the stress relaxation during the delay time or lower degree of monomer conversion as claimed in the literature, is the cause of the reduction In the polymerization stress.The study clarifies a long-standing confusion and controversy on the applicability of the pulse-delay photocuring technique for reducing the polymerization stress and promotes its potential clin. success for dental restorative composites.

Dental Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Formula: C11H15NO2.

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

Hammoud, Fatima published the artcileChemical engineering around the 5,12-dihydroindolo[3,2-a]carbazole scaffold: Fine tuning of the optical properties of visible light photoinitiators of polymerization, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is European Polymer Journal (2022), 111218, database is CAplus.

5,12-Dihydroindolo[3,2-a]carbazole is a promising scaffold for the design of visible light photoinitiators of polymerization due to the simultaneous presence of two carbazole moieties that can be differently functionalized. Notably, red shift of the absorption spectra can be facilely obtained by nitration of one of the two carbazoles, the second carbazole group being functionalized with various groups. Dinitration of 5,12-dihydroindolo[3,2-a]carbazole is another efficient approach for designing dyes with strong absorptions extending over the visible range. In this work, a series of 36 compounds never reported in the literature and differing by the substitution pattern have been designed and synthesized. Notably, the possibility to design push-pull dyes by Knoevenagel and Claisen Schmidt reactions, to introduce electroactive groups such as thiophene by Suzuki cross-coupling reactions or to design water soluble chromophore has been explored. To evidence the interest of these structures, photopolymerization experiments have been carried out at 405 nm and the polymerization of acrylates has been examined in thick and thin films. To support the polymerization efficiency, mechanisms involved in the free radical polymerization of acrylates have been established by the combination of various techniques including UV-visible absorption and fluorescence spectroscopy, cyclic voltammetry and photolysis experiments

European Polymer Journal published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

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

Rahal, Mahmoud published the artcileDesign of keto-coumarin based photoinitiator for free radical photopolymerization: Towards 3D printing and photocomposites applications, HPLC of Formula: 10287-53-3, the publication is European Polymer Journal (2021), 110559, database is CAplus.

In this article, ten organic dyes based on keto-coumarin (KC) derivatives (MeO-Coum1, MeO-Coum10) have been synthesized and characterized as high performance photoinitiators for the Free Radical Photopolymerization (FRP) of acrylates upon visible light exposure using a Light emitting diode (LED) @405 nm. The addition of iodonium salt (Iod), amine [ethyl dimethylaminobenzoate (EDB) or N-phenylglycine (NPG)] and Iod/NPG couple in the photocurable resins have been carried out in order to prove their influences on the improvement on the photoinitiating abilities of keto-coumarins. The different dyes showed a very high ability to initiate the free radical photopolymerization by introduction of these additives, using two or three-component photoinitiating systems based on MeO-Coum/Iod or amine (0.1% or 0.4%/1% weight/weight) or MeO-Coum/Iod/NPG (0.1% or 0.4%/1%/1% weight/weight/w) resp. In fact, these photoinitiators have been tested in different applications. For example: in direct laser write to generate 3D patterns using a laser diode @405 nm, or for the photocomposite synthesis based on glass fibers. To characterize the initiation ability and to explain the reaction mechanisms in the photoinitiation step, several techniques have been used, such as UV-visible spectroscopy and steady state photolysis, fluorescence emission, RT-FTIR and cyclic voltammetry experiments

European Polymer Journal published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, HPLC of Formula: 10287-53-3.

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

Sarki, Naina published the artcileSimple RuCl₃-catalyzed N-Methylation of Amines and Transfer Hydrogenation of Nitroarenes using Methanol, Synthetic Route of 10287-53-3, the publication is ChemCatChem (2021), 13(7), 1722-1729, database is CAplus.

Methanol is a potential hydrogen source and C₁ synthon, which finds interesting applications in both chem. synthesis and energy technologies. The effective utilization of this simple alc. in organic synthesis is of central importance and attracts scientific interest. Herein, a clean and cost-competitive method with the use of methanol as both C₁ synthon and H₂ source for selective N-methylation of amines by employing relatively cheap RuCl₃.xH₂O as a ligand-free catalyst. This readily available catalyst tolerates various amines comprising electron-deficient and electron-donating groups and allows them to transform into corresponding N-methylated products in moderate to excellent yields. In addition, few marketed pharmaceutical agents (e.g., venlafaxine and imipramine) were also successfully synthesized via late-stage functionalization from readily available feedstock chems., highlighting synthetic value of this advanced N-methylation reaction. Using this platform, also attempted tandem reactions with selected nitroarenes to convert them into corresponding N-methylated amines using MeOH under H₂-free conditions including transfer hydrogenation of nitroarenes-to-anilines and prepared drug mols. (e.g., benzocaine and butamben) as well as key pharmaceutical intermediates. Further enable one-shot selective and green syntheses of 1-methylbenzimidazole using ortho-phenylenediamine (OPDA) and methanol as coupling partners.

ChemCatChem published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Synthetic Route of 10287-53-3.

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

Jiang, Zhujun published the artcileThree dimensional printing of porous scaffolds BaTiO₃ piezoelectric ceramics and regulation of their mechanical and electrical properties, Application In Synthesis of 10287-53-3, the publication is Ceramics International (2022), 48(5), 6477-6487, database is CAplus.

A series of porous scaffolds of piezoelec. ceramic barium titanate (BaTiO₃) were successfully fabricated by Digital Light Processing (DLP) 3D printing technol. in this work. To obtain a high-precision and high-purity sample, the debinding sintering profile was explored and the optimal parameters were determined as 1425°C for 2h. With the increase of scaffolds porosity from 10% to 90%, the compressive strength and piezoelec. coefficient (d₃₃) decreased gradually. The empirical formulas about the mech. and piezoelec. properties were obtained by adjusting BaTiO3 ceramics with different porosity. In addition, the distribution of potential and stress under 100 MPa pressure were studied by the finite element method (FEM).

Ceramics International published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Application In Synthesis of 10287-53-3.

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