Month: October 2022

Name: 3-(Methoxycarbonyl)benzoic acidOn March 28, 2022, Ward, Lucy C.; McCue, Hannah V.; Rigden, Daniel J.; Kershaw, Neil M.; Ashbrook, Chloe; Hatton, Harry; Goulding, Ellie; Johnson, James R.; Carnell, Andrew J. published an article in Angewandte Chemie, International Edition. The article was 《Carboxyl Methyltransferase Catalysed Formation of Mono- and Dimethyl Esters under Aqueous Conditions: Application in Cascade Biocatalysis》. The article mentions the following:

Carboxyl methyltransferase (CMT) enzymes catalyze the biomethylation of carboxylic acids under aqueous conditions and have potential for use in synthetic enzyme cascades. Herein we report that the enzyme FtpM from Aspergillus fumigatus can methylate a broad range of aromatic mono- and dicarboxylic acids in good to excellent conversions. The enzyme shows high regioselectivity on its natural substrate fumaryl-L-tyrosine, trans, trans-muconic acid and a number of the dicarboxylic acids tested. Dicarboxylic acids are generally better substrates than monocarboxylic acids, although some substituents are able to compensate for the absence of a second acid group. For dicarboxylic acids, the second methylation shows strong pH dependency with an optimum at pH 5.5-6. Potential for application in industrial biotechnol. was demonstrated in a cascade for the production of a bioplastics precursor (FDME) from bioderived 5-hydroxymethylfurfural (HMF). In the experiment, the researchers used 3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0Name: 3-(Methoxycarbonyl)benzoic acid)

3-(Methoxycarbonyl)benzoic acid(cas: 1877-71-0) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Name: 3-(Methoxycarbonyl)benzoic acid They 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. Polyesters are important plastics, with monomers linked by ester moieties.

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

Quality Control of Methyl 3-oxovalerateOn October 18, 2021 ,《Ru-NHC-Catalyzed Asymmetric Hydrogenation of 2-Quinolones to Chiral 3,4-Dihydro-2-Quinolones》 was published in Angewandte Chemie, International Edition. The article was written by Hu, Tianjiao; Lueckemeier, Lukas; Daniliuc, Constantin; Glorius, Frank. The article contains the following contents:

The Ru(II)-NHC-catalyzed asym. hydrogenation of 2-quinolones under mild reaction conditions was developed. Alkyl-, aryl- and halogen-substituted optically active dihydro-2-quinolones I [R = H, Me; R1 = Me, Bn; R2 = H, Me, Et, i-Pr, Ph; R3 = H; R4 = H, Me, Ph, etc.; R5 = H, OMe, F, etc.; R6 = H, Me; R1R3 = (CH2)3] were obtained in high yields with moderate to excellent enantioselectivities. The reaction provided an efficient and atom-economic pathway to construct simple chiral 3,4-dihydro-2-quinolones. The desired products could be further reduced to tetrahydroquinolines and octahydroquinolones. The experimental process involved the reaction of Methyl 3-oxovalerate(cas: 30414-53-0Quality Control of Methyl 3-oxovalerate)

Methyl 3-oxovalerate(cas: 30414-53-0) belongs to ketone compounds. Ketone compounds have important physiological properties. They are found in several sugars and in compounds for medicinal use, including natural and synthetic steroid hormones. Molecules of the anti-inflammatory agent cortisone contain three ketone groups.Quality Control of Methyl 3-oxovalerate

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

Application of 30414-53-0On May 12, 2021 ,《Rapid broad spectrum detection of carbapenemases with a dual fluorogenic-colorimetric probe》 appeared in Journal of the American Chemical Society. The author of the article were Ma, Chi-Wang; Ng, Kenneth King-Hei; Yam, Bill Hin-Cheung; Ho, Pak-Leung; Kao, Richard Yi-Tsun; Yang, Dan. The article conveys some information:

Carbapenems stand as one of the last-resort antibiotics; however, their efficacy is threatened by the rising number and rapid spread of carbapenemases. Effective antimicrobial stewardship thus calls for rapid tests for these enzymes to aid appropriate prescription and infection control. Herein, we report the first effective pan-carbapenemase reporter CARBA-H with a broad scope covering all three Ambler classes. Using a chem. biol. approach, we demonstrated that the absence of the 1β-substituent in the carbapenem core is key to pan-carbapenemase recognition, which led to our rational design and probe development. CARBA-H provides a dual colorimetric-fluorogenic response upon carbapenemase-mediated hydrolysis. A clear visual readout can be obtained within 15 min when tested against a panel of carbapenemase-producing Enterobacteriaceae (CPE) clin. isolates that notably includes OXA-48 and OXA-181-producing strains. Furthermore, CARBA-H can be applied to the detection of carbapemenase activity in CPE-spiked urine samples. The results came from multiple reactions, including the reaction of Methyl 3-oxovalerate(cas: 30414-53-0Application of 30414-53-0)

Methyl 3-oxovalerate(cas: 30414-53-0) belongs to ketone compounds. Ketone compounds have important physiological properties. They are found in several sugars and in compounds for medicinal use, including natural and synthetic steroid hormones. Molecules of the anti-inflammatory agent cortisone contain three ketone groups.Application of 30414-53-0

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

Safety of 4-n-Pentylphenyl-4-pentylbenzoateOn May 31, 1985, Soileau, M. J.; Guha, Shekhar; Williams, William E.; Van Stryland, E. W.; Vanherzeele, H.; Pohlmann, J. L. W.; Sharp, E. J.; Wood, G. published an article in Molecular Crystals and Liquid Crystals. The article was 《Studies of the nonlinear switching properties of liquid crystals with picosecond pulses》. The article mentions the following:

A comparative study of self-focusing in 7 liquid crystals using picosecond 0.53 and 1.06 μm pulses is presented. MEBBA has the highest nonlinearity at 0.53 μm as determined in an optical power limiting experiment This limiting appears to be due to nonlinear refraction enhanced by 2-photon absorption. The experimental part of the paper was very detailed, including the reaction process of 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Safety of 4-n-Pentylphenyl-4-pentylbenzoate)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. 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. Safety of 4-n-Pentylphenyl-4-pentylbenzoate

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

Quality Control of 4-n-Pentylphenyl-4-pentylbenzoateOn September 30, 1987 ,《Reentrant nematic and injected smectic behavior in binary mixtures including those of terminally nonpolar compounds》 was published in Molecular Crystals and Liquid Crystals. The article was written by Chan, L. K. M.; Gray, G. W.; Lacey, D.; Srithanratana, T.; Toyne, K. J.. The article contains the following contents:

Some examples of injected smectic behavior (SB and SA) for binary mixtures of strong terminally polar mesogens with a range of terminally nonpolar esters are presented. Variations in the strength of the injected behavior are discussed. Mixtures of terminally nonpolar 4,4″”-dialkyl-2′-fluoro-p-terphenyls (I) with CN-substituted mesogens were also studied and provide an example of injection of SA and SE phases. Binary mixtures consisting solely of homologs of I can exhibit reentrant nematic behavior, providing further evidence that reentrant phenomena are not a special feature of terminally polar mesogens and their mixtures An isomeric mixture of 2 compounds of I also gives an injected SC phase, and enhanced SC properties are recorded for other mixtures of I. Mixtures involving alkyl/alkoxy analogs of I also provide examples of SC phase injection or enhancement, and in 1 case some evidence for injected SI behavior. The experimental process involved the reaction of 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters.Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones.

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

Baek, Du-Jong; Kang, Tae-Beom; Kim, Hyun Ju published their research in Bulletin of the Korean Chemical Society on December 20 ,2004. The article was titled 《Synthesis of nonclassical quinazolinone antifolates as thymidylate synthase inhibitors and their antitumor activity in vitro》.Formula: C10H14ClNO2 The article contains the following contents:

Nonclassical quinazolinone analogs, e.g., I (R = H, Me; R1 = H, OH, CO2H, CO2Me), in which the glutamic acid moiety of the classical antifolates is substituted by phenylglycine, phenylalanine or aminobenzoic acid and their Me esters, were synthesized and evaluated as lipophilic inhibitors of thymidylate synthase (TS). The target compounds were generally potent inhibitors of L. casei and human TS with IC50 values within the narrow range of 0.2-10 μM and 0.003-0.03 μM, resp. Further, most of the target compounds showed cytotoxicity against tumor cell lines of murine and human origin with IC50 values of as low as 0.050 μM. Substitution of another hydroxyl or carboxylic acid/ester group at the Ph ring further increased the potency of TS inhibition and cell growth inhibition. Most effective were compounds I (R = H, R1 = CO2H; R = Me, R1 = CO2Me) in which extra carboxylic acid/ester was present at the Ph ring with nanomolar IC50 values of 0.0044 and 0.0093 μM against human TS and submicro-molar cytotoxic growth inhibition against all four tumor cell lines. In addition to this study using H-Phg-OEt.HCl, there are many other studies that have used H-Phg-OEt.HCl(cas: 59410-82-1Formula: C10H14ClNO2) was used in this study.

H-Phg-OEt.HCl(cas: 59410-82-1) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Formula: C10H14ClNO2 They 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. Polyesters are important plastics, with monomers linked by ester moieties.

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

In 2019,Advanced Synthesis & Catalysis included an article by Mendez-Sanchez, Daniel; Mourelle-Insua, Angela; Gotor-Fernandez, Vicente; Lavandera, Ivan. Category: esters-buliding-blocks. The article was titled 《Synthesis of α-Alkyl-β-Hydroxy Amides through Biocatalytic Dynamic Kinetic Resolution Employing Alcohol Dehydrogenases》. The information in the text is summarized as follows:

Chiral (α-substituted) β-hydroxy amides are interesting derivatives as they are useful building blocks of many biol. active compounds Herein, the biocatalytic stereocontrolled synthesis of various acyclic syn-α-alkyl-β-hydroxy amides through a dynamic kinetic resolution is shown. Hence, a series of overexpressed alc. dehydrogenases (ADHs) in Escherichia coli was used to reduce the corresponding racemic β-keto amides. Among them, ADH-A from Rhodococcus ruber and com. evo-1.1.200 afforded the best activities and selectivities, giving access to the opposite enantiomers with high diastereomeric excess and excellent enantiomeric excess. Some of these compounds were obtained at semipreparative scale. In the part of experimental materials, we found many familiar compounds, such as Methyl 3-oxovalerate(cas: 30414-53-0Category: esters-buliding-blocks)

Methyl 3-oxovalerate(cas: 30414-53-0) belongs to ketone compounds. Ketone compounds have important physiological properties. They are found in several sugars and in compounds for medicinal use, including natural and synthetic steroid hormones. Molecules of the anti-inflammatory agent cortisone contain three ketone groups.Category: esters-buliding-blocks

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

In 2019,Catalysis Science & Technology included an article by Mourelle-Insua, Angela; Mendez-Sanchez, Daniel; Galman, James L.; Slabu, Iustina; Turner, Nicholas J.; Gotor-Fernandez, Vicente; Lavandera, Ivan. Product Details of 30414-53-0. The article was titled 《Efficient synthesis of α-alkyl-β-amino amides by transaminase-mediated dynamic kinetic resolutions》. The information in the text is summarized as follows:

The biocatalytic stereocontrolled synthesis of various acyclic anti- or syn-α-alkyl-β-amino amides through a dynamic kinetic resolution strategy is demonstrated. A series of com. available and inhouse transaminases (TAs) were employed to perform the transamination of a series of chem. synthesized racemic α-alkyl-β-keto amides. Among them, com. (R)-selective TAs showed the best activities and selectivities, giving access preferentially to the anti-diastereoisomers with low to high diastereomeric ratios (up to 96%) and excellent enantiomeric excess (>99%). The stereoselective biotransamination experiments were successfully demonstrated at a semi-preparative scale (25 mM, 100 mg substrate), leading to the corresponding optically active α-alkyl-β-amino amides in 45-90% isolated yields after a simple liquid-liquid extraction protocol. The experimental part of the paper was very detailed, including the reaction process of Methyl 3-oxovalerate(cas: 30414-53-0Product Details of 30414-53-0)

Methyl 3-oxovalerate(cas: 30414-53-0) belongs to ketone compounds. Ketone compounds have important physiological properties. They are found in several sugars and in compounds for medicinal use, including natural and synthetic steroid hormones. Molecules of the anti-inflammatory agent cortisone contain three ketone groups.Product Details of 30414-53-0

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

Vinogradov, A. S.; Krasnov, V. I.; Platonov, V. E. published an article on January 31 ,2008. The article was titled 《Organozinc reagents from polyfluoroarenes: preparation and reactions with allyl halides. Synthesis of allylpolyfluoroarenes》, and you may find the article in Russian Journal of Organic Chemistry.Quality Control of Ethyl 2,3,4,5,6-pentafluorobenzoate The information in the text is summarized as follows:

Organozinc compounds of the general formula ArFZnX (X = Cl, ArF) were synthesized by reactions of Zn with chloropolyfluoroarenes and of Zn/SnCl2 with polyfluoroarenes. Polyfluorinated organozinc compounds reacted with allyl chloride and allyl bromide to give the corresponding allyl-substituted polyfluoroarenes. The reactions with allyl chloride were carried out in the presence of copper(I) salts (CuCl or CuI). In the experiment, the researchers used Ethyl 2,3,4,5,6-pentafluorobenzoate(cas: 4522-93-4Quality Control of Ethyl 2,3,4,5,6-pentafluorobenzoate)

Ethyl 2,3,4,5,6-pentafluorobenzoate(cas: 4522-93-4) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones.Quality Control of Ethyl 2,3,4,5,6-pentafluorobenzoate

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

In 2001,Lee, Chul Bom; Wu, Zhicai; Zhang, Fei; Chappell, Mark D.; Stachel, Shawn J.; Chou, Ting-Chao; Guan, Yongbiao; Danishefsky, Samuel J. published 《Insights into Long-Range Structural Effects on the Stereochemistry of Aldol Condensations: A Practical Total Synthesis of Desoxyepothilone F》.Journal of the American Chemical Society published the findings.Recommanded Product: 16982-21-1 The information in the text is summarized as follows:

A processable total synthesis of a potent antitumor agent, desoxyepothilone F [dEpoF, 21-hydroxy-12,13-desoxyepothilone B, 21-hydroxyepothilone D (I; R1 = Me, R2 = OH)], has been accomplished. The route is highly convergent. The new technol. has also been applied to a total synthesis of 12,13-desoxyepothilone B [dEpoB (I; R1 = Me, R2 = H)]. The crucial point of departure from previous syntheses of I (R1 = Me, R2 = H, OH) involves presentation of the C1-C11 sector for Suzuki coupling with C3 in reduced form. Hitherto, the required S stereochem. at C3 had been implemented via reduction of a keto function after Suzuki coupling. Whereas that chem. worked quite well in a synthesis of I (R1 = Me, R2 = H), it was not transferable to a high-yielding synthesis of I (R1 = Me, R2 = OH). The reduction of the keto group at C3 via a Noyori protocol after Suzuki coupling had proved to be very difficult. In our current approach, two consecutive aldol reactions are used to fashion the acyl sector. In the first aldol condensation, C6 becomes attached to C7. Following protection at C7, a two-carbon acetate equivalent is used to join C2 and C3 with very high asym. induction at C3. Only after this center has been implemented is the Suzuki reaction conducted. This major advance allowed us to synthesize I (R1 = Me, R2 = OH) in a straightforward fashion. These findings found ready application in the total synthesis of dEpoB. Another part of the study involved anal. of the factors associated with aldol condensations joining C6 to C7. In the work described herein, the consequences of the status of C3 in promoting the C6-C7 aldol coupling are probed in detail. Dramatic stereochem. long-range effects uncovered during the study are described, and a working model to explain these effects has emerged. In the experimental materials used by the author, we found Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1Recommanded Product: 16982-21-1)

Ethyl 2-amino-2-thioxoacetate(cas: 16982-21-1) belongs to anime. Reaction with nitrous acid (HNO2), which functions as an acylating agent that is a source of the nitrosyl group (―NO), converts aliphatic primary amines to nitrogen and mixtures of alkenes and alcohols corresponding to the alkyl group in a complex process. This reaction has been used for analytical determination of primary amino groups in a procedure known as the Van Slyke method.Recommanded Product: 16982-21-1

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