Tag: M.W=200-250

Nordlund, Donald A. published the artcileKairomones and their use for management of entomophagous insects. XIV. Response of Telenomus remus to abdominal tips of Spodoptera frugiperda, (Z)-9-tetradecen-1-yl acetate and (Z)-9-dodecen-1-yl acetate, Safety of (Z)-Dodec-9-en-1-yl acetate, the publication is Journal of Chemical Ecology (1983), 9(6), 695-701, database is CAplus and MEDLINE.

T. remus Is a parasitoid that attacks egg masses of S. frugiperda. Increased host-seeking behavior was elicited from T. remus females in Y-tubes, Petri dish, and greenhouse bioassays by S. frugiperda female abdominal tips as well as (Z)-9-tetradecen-1-yl acetate  [16725-53-4] and (Z)-9-dodecen-1-yl acetate  [16974-11-1].

Journal of Chemical Ecology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Safety of (Z)-Dodec-9-en-1-yl acetate.

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

Zhang, Hai-Yan published the artcilePreparation of polymer-encapsulated silica by using the living radical polymerization (iniferter) method and chromatographic performance evaluation, Safety of Benzyl diethylcarbamodithioate, the publication is Huaxue Xuebao (2008), 66(19), 2151-2156, database is CAplus.

The living radical polymerization (iniferter) method was used to prepare the polymer-encapsulated silica as a chromatog. stationary phase. The 2-ethylhexyl methacrylate and ethylene dimethacrylate were polymerized and grafted on the silica surface by the initiation of the iniferter bound on the silica. The influence of the synthetic conditions on the polymer layers and the chromatog. separation was studied. The linear relation between the polymerization time and the amount of the polymer grafted on the silica in certain reaction period was observed Meanwhile, polymer-encapsulated silica could be re-initialized for the successive grafting reaction, which showed the character of the living radical polymerization The polymer-encapsulated silica showed good separation ability and column efficiency for the alkylbenzene, basic compounds and hydroxybenzoate. The basic compounds have small peak tailings on the polymer-encapsulated silica stationary phase, which indicated that silanol groups on the silica surface were effectively covered by the polymer layer. The work provided a new method for the synthesis of polymer-encapsulated silica.

Huaxue Xuebao 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 C9H10BNO3, Safety of Benzyl diethylcarbamodithioate.

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

Chen, Baoquan published the artcileSynthetic process of camostat mesilate for pancreatitis treatment, Formula: C12H15NO4, the publication is Huagong Jinzhan (2010), 29(7), 1334-1337, 1349, database is CAplus.

Camostat mesilate, a drug for pancreatitis treatment was prepared from p-guanidinobenzoic acid hydrochloride and N,N-dimethylcarbamoylmethyl-p-hydroxyphenylacetate in the presence of DCC(N,N-dicyclohexylcarbodiimide) using DMAP(4-dimethylaminopyridine) as catalyst. P-Guanidinobenzoic acid hydrochloride was prepared from p-aminobenzoic acid and cyanamide by optimization of reaction conditions. This process is simple with easily available starting materials, which is suitable for industrial production

Huagong Jinzhan published new progress about 59721-16-3. 59721-16-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Phenol,Ester,Amide, name is 2-(Dimethylamino)-2-oxoethyl 2-(4-hydroxyphenyl)acetate, and the molecular formula is C12H15NO4, Formula: C12H15NO4.

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

Gallagher-Duval, Shawn published the artcileFunctionalized Polyhydroquinolines from Amino Acids Using a Key One-Pot Cyclization Cascade and Application to the Synthesis of (±)-Δ⁷-Mesembrenone, HPLC of Formula: 251320-63-5, the publication is Organic Letters (2021), 23(21), 8606-8611, database is CAplus and MEDLINE.

Substituted polyhydroquinolines are ubiquitous skeletal cores found in drugs and bioactive natural products. As a new route to access this motif, we successfully developed a one-pot cyclization cascade with high chemocontrol and diastereoselectivity. The sequence generates two cycles, three carbon-carbon bonds, and an all-carbon quaternary center in a highly convergent process. Functionalized polyhydroquinolines and congeners can be accessed from com. available amino acids. This versatile and robust strategy was applied to the synthesis of (±)-Δ⁷-mesembrenone.

Organic Letters published new progress about 251320-63-5. 251320-63-5 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (S)-tert-Butyl (1-hydroxy-3-methylbutan-2-yl)(methyl)carbamate, and the molecular formula is C11H23NO3, HPLC of Formula: 251320-63-5.

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

Nguyen, Van Hai published the artcilePropyl gallate, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Molbank (2021), M1201, database is CAplus.

The title compound, Pr gallate (III), is an important substance popularly used in the food, cosmetic and pharmaceutical industries. Current chem. syntheses of this compound are based on the acylation supported by thionyl chloride, DIC/DMAP or Fischer esterification using a range of homogenous and heterogenous catalysts. In this paper, an efficient, green, straightforward, and economical method for synthesizing Pr gallate using potassium hydrogen sulfate, KHSO₄, as the heterogenous acidic catalyst has been developed for the first time. In addition, this paper provides a comprehensive spectral dataset for the title compound, especially the new data on DEPT and 2D NMR (HSQC and HMBC) spectra which are not currently available in the literature.

Molbank 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, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate.

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

Byun, Young Min published the artcileMechanical properties of carbon fiber-reinforced Al₂O₃ porous ceramics, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate, the publication is Journal of the Korean Ceramic Society (2021), 58(3), 269-275, database is CAplus.

This study reports the improvement of the mech. properties of Al₂O₃ porous ceramics from particle-stabilized colloidal suspension with the addition of carbon fiber through direct foaming. The initial colloidal suspension of Al₂O₃ was partially hydrophobized by a surfactant, Pr gallate (2 wt%), to stabilize the wet foam used with the addition of carbon fiber from 2 to 8 wt% as reinforcement. The influence of carbon fiber on the air content, bubble size, pore size, and pore distribution were discussed in terms of the wet foam stability and the phys. properties of the porous ceramics. The mech. properties of the sintered porous samples were investigated by the Hertzian indentation test. The results show that the wet foam stability of more than 90% corresponds to the compressive load bearing capacity of 110 N using tungsten carbide ball with a radius of r = 7.93 mm and the elastic modulus of 114.3 MPa in the sintered sample with 2 wt% of carbon content.

Journal of the Korean Ceramic Society 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, Recommanded Product: Propyl 3,4,5-trihydroxybenzoate.

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

Kim, Jae-Hoon published the artcileα,ω-Bis[4-(4′-(S)-(+)-2-methylbutylbiphenyl-4-carboxy)phenoxy]alkanes – synthesis and liquid crystalline properties of new dimesogenic compounds, SDS of cas: 50670-76-3, the publication is Journal of the Korean Chemical Society (1998), 42(6), 679-695, database is CAplus.

α,ω-Bis[4-(4′-(S)-(+)-2-methylbutoxybiphenyl-4-carboxy)phenoxy]alkanes were synthesized, and their thermal and liquid crystalline properties were studied. The chains length of the central polymethylene spacers, x, of the chiral twin compounds was varied from 3 to 12. These compounds were characterized by elemental analyses, IR and NMR spectroscopy, DTA (DSC), and cross-polarized microscopy. All compounds are enantiotropic liquid crystalline, and the values of melting (Tm) and isotropization temperature (T_i) as well as ΔH₄ and ΔS_i decreased in a zigzag fashion, revealing the so-called odd-even effect as x increased. Their mesomorphic properties fell into four categories depending on x. Compounds with x = 3, 4 and 5 formed only a cholesteric phase on heating, while on cooling they went through two transitions of isotropic (I)-to-cholesteric (Ch) and Ch-to-smectic A (S_A) phases before crystallization Compounds with x = 6, 8 and 10 exhibited only a cholesteric phase both on heating and on cooling. Compounds with x = 7 and 9 went through three transitions of crystal (C)-to-S_A, S_A-to-Ch, and Ch-to-I phases on heating while on cooling they went through four transitions of I-to-Ch, Ch-to-S_A, S_A-to-Smectic C (S_C), and S_C-to-C phases in that order. Compounds with x = 11 and 12 went reversibly through four transitions of C-to-S_C, S_C-to-S_A, S_A-to-Ch, and Ch-to-I phases.

Journal of the Korean Chemical Society 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

Kim, Dae Seok published the artcileSelf-Regulated Smectic Emulsion with Switchable Lasing Application, Category: esters-buliding-blocks, the publication is Small (2019), 15(49), 1903818, database is CAplus and MEDLINE.

A structurally reversible smectic liquid crystal (LC) emulsion made of semifluorinated rod-type mols. in silicone oil, which is controlled by simple heating and cooling, is presented. Without adding any kind of additives, such as surfactants, polymers or emulsifiers, and without using any special tools, such as microfluidics or gas bubbling, the LC mols. spontaneously form monodisperse spherical and myelin-like structures upon cooling from the isotropic temperature The LC emulsion can easily trap guest materials, providing a platform for repeatable and reliable switchable emulsification. For example, this interesting system enables the realization of an on-off lasing system by confining fluorescent dyes in the LC droplets.

Small 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, Category: esters-buliding-blocks.

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

Otsu, T. published the artcileLiving radical polymerization in homogeneous system by using iniferter: design of block copolymers, Synthetic Route of 3052-61-7, the publication is Journal of Macromolecular Science, Chemistry (1984), A21(8-9), 961-77, database is CAplus.

Benzyl N-ethyldithiocarbamate (I) [28249-01-6] and p-xylylene bis(N-ethyldithiocarbamate) (II) [93522-33-9] were prepared, and used as mono- and bifunctional photoiniferters, resp., of the polymerization of styrene and Me methacrylate. These photopolymerizations were performed via a living radical polymerization mechanism in a homogeneous system. The polymers obtained by I and II still contained 1 and 2 reactive N-ethyldithiocarbamate end groups, resp., bonded at their chain ends. When these polymers reacted with nucleophiles and Cu²⁺ the chain extension reactions occurring depended on their functionality. By using the polymers obtained by I and II as mono- and bifunctional polymeric photoiniferters, AB and ABA block copolymers were also obtained, resp. Similar results were obtained by using benzyl N,N-diethyldithiocarbamate  [3052-61-7] and p-xylylene bis(N,N-diethyldithiocarbamate) [89964-93-2] as mono- and bifunctional photoiniferters, resp. These results were also compared and discussed.

Journal of Macromolecular Science, Chemistry 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, Synthetic Route of 3052-61-7.

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

Otsu, Takayuki published the artcilePolymer design by iniferter technique in radical polymerization: synthesis of AB and ABA block copolymers containing random and alternating copolymer sequences, Synthetic Route of 3052-61-7, the publication is Polymer Journal (Tokyo, Japan) (1985), 17(1), 97-104, database is CAplus.

The iniferter (initiator-transfer agent-terminator) technique was applied to the synthesis of the AB and ABA block copolymers containing various random and alternating copolymer sequences. Monomeric photoiniferters used were of general formula Ar[CH₂SC(:S)NEt₂]_x [Ar = Ph, x = 1, (I) [3052-61-7]; Ar = 1,4-C₆H₄, x = 2, (II) [89964-93-2]; and Ar = 1,2,4,5-C₆H₂, x = 4, (III) [92687-20-2]]. Polymeric photoiniferters were prepared by photolysis of I, II, and III. The photopolymerizations with I and II proceeded via a living radical mechanism III and gave soluble mono- and bifunctional polymers, resp. However, III induced living radical polymerization of styrene with gelation. When various polymers and copolymers obtained by I and II were used as polymeric photoiniferters, the AB and ABA block copolymers containing random copolymer sequences were obtained in high yields. Similarly, the alternating copolymerization of iso-Bu vinyl ether with maleic anhydride in the presence of alternating copolymers (e.g., styrene and di-iso-Pr fumarate), which were obtained with I and II, as polymeric photoiniferters gave the AB and ABA block copolymers consisting of alternating copolymer sequences. III and the polymers and copolymers obtained by III could also act as an excellent crosslinking agent.

Polymer Journal (Tokyo, Japan) 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, Synthetic Route of 3052-61-7.

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