Month: December 2022

Xie, Peizhong published the artcileAlkaline-earth Metal-Catalyzed Dehydrative Allylic Alkylation, Formula: C6H8O3, the publication is Organic Letters (2020), 22(1), 31-35, database is CAplus and MEDLINE.

An alk.-earth metal catalytic system for environmentally benign allylic alkylation was developed. Allylic alcs. can be utilized directly at room temperature in this transition metal-free process, producing water as the only byproduct. A variety of allylic compounds, including the ones containing all-carbonyl quaternary centers, can be obtained with high yields.

Organic Letters published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C8H14O4, Formula: C6H8O3.

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

Miao, Pannan published the artcileVisible-light induced metal-free cascade Wittig/hydroalkylation reactions, Synthetic Route of 19788-49-9, the publication is Green Chemistry (2021), 23(4), 1638-1641, database is CAplus.

Through a relay olefination and radical addition process, visible light induced cascade Wittig/hydroalkylation reactions were developed. This metal-free radical approach featured mild conditions, robustness and excellent functionality compatibility. It allowed access to saturated C3 homologation products directly from aldehydes or ketones. The synthetic utility of this method was demonstrated by a two-step synthesis of indolizidine 209D.

Green Chemistry published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Synthetic Route of 19788-49-9.

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

Hu, Lifu published the artcileVisible-light induced green synthesis of γ-deuterated carbonyl compounds, Quality Control of 19788-49-9, the publication is Tetrahedron Letters (2022), 153914, database is CAplus.

Deuteration is a widely used labeling technique. Through a visible-light induced desulfurization and radical addition process in EtOAc-D₂O, the authors were able to develop the direct synthesis of γ-deuterated carbonyl compounds from α-sulfide ketones and alkenes. Products with different functionalities were efficiently synthesized with high deuteration. This mild and metal-free method provides a valuable tool for medicinal and synthetic chemists.

Tetrahedron Letters published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Quality Control of 19788-49-9.

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

Wu, YinPing published the artcileA new carbazolyl-based acylphosphine oxide photoinitiator with high performance and low migration, Category: esters-buliding-blocks, the publication is Journal of Polymer Science (Hoboken, NJ, United States) (2022), 60(1), 52-61, database is CAplus.

In order to obtain a new photoinitiator with high efficiency, low migration, and high solubility in acrylate monomers, a new compound named 9-allyl-9H-carbazol-3-yldipenylphosphine oxide (ALPO) was designed and synthesized. Compared to 9-ethyl-9H-carbazol-3-yldipenylphosphine oxide, the double bond conversion (DC) and solubility of ALPO in acrylic monomers were greatly improved, and the migration rate was greatly reduced after replacing the Et group in the mol. with an allyl group. Compared with (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO), which was widely used com., ALPO had a higher DC and lower migration rate. This means that ALPO may be able to replace TPO in the light curing field.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C10H10N2, Category: esters-buliding-blocks.

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

Wu, YinPing published the artcileNew acyl phosphine oxides as high-performance and low migration type I photoinitiators of radical polymerization, Application of Trimethylolpropane triacrylate, the publication is Progress in Organic Coatings (2022), 106876, database is CAplus.

Two low migration acylphosphine oxide photoinitiators (APO and DAPO) containing unsaturated C=C double bonds have been designed and synthesized for free radical polymerization The properties and performances of APO and DAPO in the free radical polymerization of trimethylolpropane triacrylate (TMPTA) were evaluated and compared with the com. photoinitiator 2,4,6-trimethyl(phenyl) di-Ph oxide (TPO). The results show that DAPO exhibited the best double bond conversion (DC) of TMPTA in the photoinitiators tested under the same reaction conditions. The migration ratio of APO and DAPO was 2/3 and 1/3 of that of TPO resp. indicating lower migration than the conventional photoinitiator, and the solubility of DAPO in monomers was close to that of TPO, which provided the possibility for the industrial application of DAPO.

Progress in Organic Coatings published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C14H23N, Application of Trimethylolpropane triacrylate.

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

Wu, YinPing published the artcileStudy on bifunctional acyldiphenylphosphine oxides photoinitiator for free radical polymerization, Product Details of C15H20O6, the publication is European Polymer Journal (2022), 111093, database is CAplus.

Three novel bifunctional acylphosphineoxide compounds containing diallyl amino group were designed and synthesized as photoinitiators for free radical photopolymerization (FRP) of acrylates. Firstly, the photoinitiation properties of DABPOs (DABPO-1, DABPO-2 and DABPO-3), including their UV-vis spectra, the migration after curing and the solubility in monomers, have been studied and compared with com. photoinitiator 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO). The results show that DABPOs have the red-shift absorption wavelength, higher molar absorption coefficient, lower migration and higher solubility comparing with TPO, and they have higher double bond conversion (DC) in TMPTA monomer than TPO under the exposure of 420 nm. Secondly, DABPOs have been successfully used as co-initiator in H-extraction photocuring system. The results show that diallyl amino acylphosphine oxides are effective bifunctional photoinitiators for photopolymerization under LED irradiation

European Polymer Journal published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C27H23F6NO6S, Product Details of C15H20O6.

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

Wu, YinPing published the artcileStudy on bifunctional acyldiphenylphosphine oxides photoinitiator for free radical polymerization, Synthetic Route of 10287-53-3, the publication is European Polymer Journal (2022), 111093, database is CAplus.

Three novel bifunctional acylphosphineoxide compounds containing diallyl amino group were designed and synthesized as photoinitiators for free radical photopolymerization (FRP) of acrylates. Firstly, the photoinitiation properties of DABPOs (DABPO-1, DABPO-2 and DABPO-3), including their UV-vis spectra, the migration after curing and the solubility in monomers, have been studied and compared with com. photoinitiator 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO). The results show that DABPOs have the red-shift absorption wavelength, higher molar absorption coefficient, lower migration and higher solubility comparing with TPO, and they have higher double bond conversion (DC) in TMPTA monomer than TPO under the exposure of 420 nm. Secondly, DABPOs have been successfully used as co-initiator in H-extraction photocuring system. The results show that diallyl amino acylphosphine oxides are effective bifunctional photoinitiators for photopolymerization under LED irradiation

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 C19H18O2, Synthetic Route of 10287-53-3.

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

Liu, Ruo-Chen published the artcileAnalysis of volatile odor compounds and aroma properties of European vinegar by the ultra-fast gas chromatographic electronic nose, Related Products of esters-buliding-blocks, the publication is Journal of Food Composition and Analysis (2022), 104673, database is CAplus.

Vinegar is a very popular condiment with different species and aroma profiles. Eighty-three volatile odor compounds (VOCs) were identified from European vinegar using ultra-fast gas chromatog. electronic nose (UFGC E-nose), of which there were 61 VOCs with odor activity value (OAV) ≥ 1. Among the 61 VOCs, acetic acid, Et isovalerate, propionaldehyde, butanoic acid, Et cinnamate, and guaiacol contributed significantly to the aroma property and type of European vinegar. There were obvious clustering trends of apple vinegar, wine vinegar, and balsamic vinegar in principal component anal. (PCA). The clustering of the vinegar-like groups was more obvious in orthogonal partial least squares discriminant anal. (OPLS-DA). The volatile markers discriminating vinegar, including acetic acid, propionic acid, pyrazine, furfural, iso-Pr alc., and so on, were screened out by variable importance for the projection (VIP). These results demonstrated that UFGC E-nose is a novel, rapid and non-destructive anal. tool and can also be used for identifying aroma compounds and tracing the food species.

Journal of Food Composition and Analysis published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Related Products of esters-buliding-blocks.

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

Yang, Dezhi published the artcileA multifunctional nanozyme-based enhanced system for tert-butyl hydroquinone assay by surface-enhanced Raman scattering, Safety of Propyl 3,4,5-trihydroxybenzoate, the publication is Microchimica Acta (2022), 189(1), 29, database is CAplus and MEDLINE.

An Au-based nanozyme composite (AuNPs/Cu,I) was constructed by using Cu,I-doped carbon dots (Cu,I-CDs) as the reducing agent as well as the nanozyme. Notably, AuNPs/Cu,I nanozyme not only possessed the intrinsic activity of mimicking enzymes of superoxide dismutase, peroxidase, and catalase at different conditions but was also employed as surface-enhanced Raman spectroscopy (SERS) enhancer. The combination of Cu,I-CDs and AuNPs promoted the electron transferability, leading to increased peroxidase-like activity and superoxide-like activity. Compared to the individual Cu,I-CDs and AuNPs nanozyme, the AuNPs/Cu,I composite demonstrated promising peroxidase-like activity by transferring electrons instead of generating OH. Interestingly, the multienzyme-like activity of AuNPs/Cu,I nanozyme could be finely tuned by changing the composition of Cu0/Cu+ and Au. The tert-Bu hydroquinone (TBHQ) as the substrate could be catalyzed with AuNPs/Cu,I nanozyme to produce red substances, resulting in a significant Raman enhancement effect at the same time, showing good linear range from 0.11 to 10 mg L^-1. Overall, the current investigation provides a flexible and controllable way to design multifunctional nanozymes along with the Raman enhancement strategy based on the catalysis of nanozyme.

Microchimica Acta published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C6H13I, Safety of Propyl 3,4,5-trihydroxybenzoate.

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

Li, Hong published the artcileHemin loaded Zn-N-C single-atom nanozymes for assay of propyl gallate and formaldehyde in food samples, SDS of cas: 121-79-9, the publication is Food Chemistry (2022), 132985, database is CAplus and MEDLINE.

Single-atom nanozymes (SAzymes) show distinct advantages in catalytic activity and selectivity owing to their stability and special characteristic of maximum at. utilization. Inspired by the structure of natural horseradish peroxidase (HRP), we developed a simple method for specific determination of both Pr gallate (PG) and formaldehyde (HCHO) by utilizing the intrinsic peroxidase mimics activity of hemin (hem) loaded Zn-nitrogen-carbon single-atom nanozymes (Zn-N-C@hem SAzymes). Zn-N-C@hem was prepared via a salt-template strategy and self-assembly, where hemin exhibits enhancing peroxidase-like activity can catalyze oxidation of colorless PG to yellow product. Upon introduction of HCHO into Zn-N-C@hem/PG system, complete suppression of PG oxidation was showed, resulting in distinguished decrease in absorbance. The colorimetric sensors of PG and HCHO based on Zn-N-C@hem/PG were developed at their resp. linear range of concentration 1.25-200 mg/kg and 5-250 mg/kg. The practicability of the rapid anal. of PG and HCHO in food samples has been verified with reliable results.

Food Chemistry published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, SDS of cas: 121-79-9.

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