Tag: 200-300

A new small molecule gelator and 3D framework ligator of lead(II) was written by Knichal, Jane V.;Gee, William J.;Burrows, Andrew D.;Raithby, Paul R.;Wilson, Chick C.. And the article was included in CrystEngComm in 2015.Reference of 313648-56-5 This article mentions the following:

Reacting equimolar quantities of 5-allenyl-1,3-benzenedicarboxylic acid (H₂abd) with lead(II) acetate trihydrate in N,N-dimethylformamide (DMF) under solvothermal conditions gave a metallogel with a critical gelation percentage of 1% weight/volume Elemental anal. performed on the gel provided a mol. composition ratio of [Pb(abd)(H₂O)]_n (1). Viewing the gel by SEM identified an entangled network of crosslinked nano-fibers. ¹H-NMR aliquots of hydrated lead(II) acetate added to a solution of H₂abd in deuterated DMF allows inferences to be made about solution-state behavior that occurs during the initial gel aggregation stage. Under non-solvothermal conditions, combining H₂abd and hydrated lead(II) acetate gave single crystals suitable for x-ray diffraction, which were identified as a 3D coordination polymer with composition [Pb(abd)(DMF)] (2). Structural features observed within this 3D coordination polymer provide the basis for assigning the mol. structure to the fibrils present within gel 1. This assertion is supported by comparable vibrational profiles taken from a sample of dried gel 1 to that of crystalline 2, and the matching of early solution-state ¹H-NMR spectroscopic trends to later solid-state observations. In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5Reference of 313648-56-5).

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Reference of 313648-56-5

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

Cu-Catalyzed Aminodifluoroalkylation of Alkynes and α-Bromodifluoroacetamides was written by Lv, Yunhe;Pu, Weiya;Chen, Qian;Wang, Qingqing;Niu, Jiejie;Zhang, Qian. And the article was included in Journal of Organic Chemistry in 2017.Application of 185619-66-3 This article mentions the following:

The copper-catalyzed highly regioselective aminodifluoroalkylation of alkynes and α-bromodifluoroacetamides was realized for the first time. With this method, 3,3-difluoro-1H-pyrrol-2(3H)-ones were constructed in a single step from various alkynes and α-bromodifluoroacetamides substrates without using any extra oxidant. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Application of 185619-66-3).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Application of 185619-66-3

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

Two Functional Porous Metal-Organic Frameworks Constructed from Expanded Tetracarboxylates for Gas Adsorption and Organosulfurs Removal was written by Luo, Xiaolong;Kan, Liang;Li, Xiang;Sun, Libo;Li, Guanghua;Zhao, Jun;Li, Dong-Sheng;Huo, Qisheng;Liu, Yunling. And the article was included in Crystal Growth & Design in 2016.Recommanded Product: Dimethyl 5-ethynylisophthalate This article mentions the following:

Two fof-type porous metal-organic frameworks (MOFs), [Cu₂(bdfdpa)(H₂O)₂]·8DMF·2H₂O (JLU-Liu29) and [Cu₂(btadpa)(H₂O)₂]·7DMF·8H₂O (JLU-Liu30) (H₄bdfdpa = 5,5′-(benzo[1,2-b:4,5-b’]difuran-2,6-diyl)diisophthalic acid and H₄btadpa = 5,5′-(benzo[c][1,2,5]thiadiazole-4,7-diylbis(ethyne-2,1-diyl))diisophthalic acid), have been successfully synthesized by using different expanded tetracarboxylate ligands. Both of them exhibit good permanent porosity and high surface areas of 2205 and 1791 m²g^-1, resp. Due to open metal sites, different functional groups, and suitable pore spaces, the two porous MOFs exhibit high adsorption performance for small mol. gases (CO₂, CH₄, C₂H₆, and C₃H₈) and removal of refractory organosulfur compounds In the experiment, the researchers used many compounds, for example, Dimethyl 5-ethynylisophthalate (cas: 313648-56-5Recommanded Product: Dimethyl 5-ethynylisophthalate).

Dimethyl 5-ethynylisophthalate (cas: 313648-56-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Recommanded Product: Dimethyl 5-ethynylisophthalate

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

Lipase-catalyzed synthesis of polymeric prodrugs of nonsteroidal anti-inflammatory drugs was written by Qian, Xueqi;Wu, Qi;Xu, Fangli;Lin, Xianfu. And the article was included in Journal of Applied Polymer Science in 2013.Formula: C12H22O4 This article mentions the following:

Because of the potential application of prodrugs of nonsteroidal anti-inflammatory drugs (NSAIDs), Candida antarctica lipase B (CAL-B) catalyzed polycondensation of profen-containing diol monomers and diesters were designed to prepare a series of biodegradable polymeric prodrugs composed of NSAID branches and poly(amide-co-ester) backbone. The structure of the products was confirmed by Fourier transform IR spectroscopy, NMR, and gel permeation chromatog. (GPC). The reaction conditions of polymerization, such as the enzyme source, amount of catalyst, and temperature, were optimized. The mol. weights of resultant copolymers were 2170-13,270 g/mol, with corresponding polydispersities from 1.17 to 2.4. The copolymers had relatively high drug loadings of 44.7-59.7 wt % because every repeat unit contained one drug mol. The strategy of enzymic polymerization appeared to be quite general and accommodated a large number of comonomer substrates with various chain lengths and substituents. The optically pure (R)-naproxen monomer was demonstratively incorporated into the corresponding copolymers with the developed synthesis strategy. The in vitro study showed that the polyester could release the drug effectively under physiol. conditions with enzyme, which indicated that the obtained product could be a promising prodrug for extending pharmacol. effects by delayed drug release. With GPC anal., we confirmed that the prodrug was completely degradable in aqueous solution The attractive features of the copolymer were its high drug loading, biodegradability, and biocompatibility. The high tolerance of the CAL-B toward drug groups, as described in this article, provides a new route for synthesizing polymeric drugs with potential biomedical applications in mild conditions and for reducing environmental impact. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2012. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Formula: C12H22O4).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Formula: C12H22O4

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

One-pot ozonolytic synthesis of acyclic α,ω-bifunctional compounds from methyl 10-undecenoate and 10-undecen-1-ol was written by Legostaeva, Yu. V.;Botsman, L. P.;Nazarov, I. S.;Yakovleva, M. P.;Garifullina, L. R.;Khalikov, R. M.;Ishmuratov, G. Yu.. And the article was included in Russian Journal of Applied Chemistry in 2015.Category: esters-buliding-blocks This article mentions the following:

Transformations of peroxy products formed by ozonolysis of undecylenic acid derivatives (Me ester and hydride reduction product, 10-undecen-1-ol) in various protic and aprotic solvents (MeOH, PrⁱOH, THF, 1: 5 AcOH-CH₂Cl₂ mixture), occurring under the action of such reductants as hydroxylamine and semicarbazide hydrochlorides, were studied. These reductants exhibit high performance and in some cases high chemoselectivity, which allowed the development of a number of one-pot procedures for the synthesis of acyclic α,ω-bifunctional compounds, the majority of which are widely used in medicine, perfumery, cosmetics, engineering, and chem. industry, e.g., as block synthons in targeted organic synthesis. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Category: esters-buliding-blocks).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Category: esters-buliding-blocks

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

Aggregation behavior of polystyrene-b-poly(acrylic acid) at the air-water interface was written by Wang, Xiaolu;Ma, Xiaoyan;Zang, Duyang. And the article was included in Soft Matter in 2013.Recommanded Product: Benzyl benzodithioate This article mentions the following:

The aggregation behavior of amphiphilic block copolymer polystyrene-b-poly(acrylic acid) (PS-b-PAA) at the air-water interface was investigated through surface pressure measurements (isotherms, compression-expansion hysteresis and compression relaxation experiments), Brewster Angle Microscopy (BAM) imaging and Atomic Force Microscopy (AFM) imaging. It is found that PS-b-PAA (M_n = 11 490 g mol^-1, PAA wt%∼62%) forms a stable Langmuir monolayer on the water surface (pH = 7) by using N,N-dimethylformamide (DMF) as the spreading solvent. The aggregation of block copolymer is induced by an initial diffusion of DMF into water from the interface. Upon compression of the film, the pseudoplateau observed in the Langmuir isotherm corresponds to a “pancake-to-brush” transition with the PAA chains gradually dissolving in the water subphase and stretching underneath the PS cores. Based on the isotherms and the BAM images, it is suggested that the polymer chain dynamics in spreading solutions with different concentrations at the time of solvent diffusion influence the interfacial behavior of block copolymers significantly. The Langmuir-Blodgett (LB) films prepared at different surface pressures from different spreading solution concentrations were scanned by AFM. A variety of morphologies such as wormlike, porous and reticulate structures, and dots were observed The isotherms and AFM images show the spreading solution concentration and surface pressure dependence of the aggregation behavior of PS-b-PAA copolymer at the air-water interface. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Recommanded Product: Benzyl benzodithioate).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Recommanded Product: Benzyl benzodithioate

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

Three-component coupling using arynes and DMF: straightforward access to coumarins via ortho-quinone methides was written by Yoshida, Hiroto;Ito, Yu;Ohshita, Joji. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2011.SDS of cas: 1190-39-2 This article mentions the following:

ortho-Quinone methides, arising from a formal [2+2] cycloaddition between arynes and DMF, were found to facilely undergo a [4+2] cycloaddition with ester enolates or ketenimine anions to produce diverse coumarins in a straightforward manner. E.g., coumarin derivative I was prepared with 79% yield by reacting CH₂(CO₂Et)₂ and F₃CSO₂O-2-C₆H₄SiMe₃ with Me₂NCHO using KF at 80°. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2SDS of cas: 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.SDS of cas: 1190-39-2

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

Preparation and characterization of novel organic/inorganic hybrid nanoparticles containing an organotin core and a polystyrene shell was written by Jia, Yong-Guang;Jiang, Jian;Liu, Ling-Yan;Chang, Wei-Xing;Li, Jing. And the article was included in Journal of Applied Polymer Science in 2012.HPLC of Formula: 27249-90-7 This article mentions the following:

A series of well-defined nanoparticles containing an organotin core and a polystyrene shell were obtained by crosslinking of n-Bu₂SnO with amphiphilic styrene-[6-(4-vinylphenoxy)hexanoic acid] diblock copolymers with various mol. weights The amphiphilic copolymers were synthesized via reversible addition fragmentation chain transfer polymerization and hydrolysis. The structures of the nanoparticles were studied by the transmission electron microscopy, SEM, and XPS anal. The morphol. of the crosslinked copolymer showed individual nanoparticles with regularly spherical shape. And the nanoparticle diameters decreased with increasing number of organotin carboxylate units. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7HPLC of Formula: 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.HPLC of Formula: 27249-90-7

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

Preparation of porous materials by amphiphilic block copolymer polystyrene-block-poly (vinyl pyrrolidone) self-assembly was written by Li, Ying;Han, Han;Yuan, Jinfang. And the article was included in Gongneng Cailiao in 2016.HPLC of Formula: 27249-90-7 This article mentions the following:

A series of diblock copolymers, polystyrene-block-poly (vinyl pyrrolidone) (PSt-b-PVP), with different hydrophilic/hydrophobic ratios was prepared by reversible addition fragmentation chain transfer (RAFT) polymerization The structures and properties of the diblock copolymers were characterized by FT IR, 1H NMR and GPC. Different additives and a series of PSt-b-PVP with different hydrophilic/hydrophobic ratios dissolved in selective solvents. After solvent evaporation, the transparent film was obtained by rising with water. FESEM was used to study the morphol. and size of the polymer porous material. The influence of additives, solvent evaporation temperature, the solvents and the hydrophilic/hydrophobic ratios on pore size were also studied. The results show that if the structure that we uses contains -OH functional groups or the monomer itself is used as additive, the porous polymer formed would have smaller holes. Meanwhile, reducing the heat is benefit to reduce the size of porous. And if we can use the structure which hydrophilic/hydrophobic ratios is PSt₁₀₁-b-PVP₇₉, it would be more easier to form smaller porous. Besides, using volatile solvent can be good for the forming of porous. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7HPLC of Formula: 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.HPLC of Formula: 27249-90-7

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

Vanillin Alkanoates in the Synthesis of Hexahydrobenzacridine and Octahydroxanthene Derivatives was written by Kozlov, N. G.;Basalaeva, L. I.. And the article was included in Russian Journal of General Chemistry in 2005.COA of Formula: C12H14O4 This article mentions the following:

Cascade heterocyclization of 1,3-cyclohexanedione and dimedone with 2-naphthylamine and vanillin esters gave 2-methoxy-4-(alkyl-11-oxo-7,8,9,10,11,12-hexahydrobenz[a]acridin-12-yl)- and 2-methoxy-4-(alkyl-1,8-dioxo-2,3,4,5,6,7,8,9-octahydro-1H-xanthen-9-yl)phenyl esters of aliphatic (C₁-C₄) carboxylic acids. In the experiment, the researchers used many compounds, for example, 4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4COA of Formula: C12H14O4).

4-Formyl-2-methoxyphenyl isobutyrate (cas: 20665-85-4) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. COA of Formula: C12H14O4

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