Month: November 2022

On April 10, 2003, Dhar, T. G. Murali; Potin, Dominique; Maillet, Magaili Jeannine Blandine; Launay, Michele; Nicolai, Eric Antoine; Iwanowicz, Edwin J. published a patent.Application In Synthesis of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate The title of the patent was Preparation of spiro-hydantoin compounds useful as anti-inflammatory agents. And the patent contained the following:

Title compounds I [L and K independently = O or S; X = N or CR3; Ar = aryl or heteroaryl; G is attached via T or M with provision when attached to C, G = bond, O, N, S, (un)substituted alkylene, bivalent alkoxy, etc., when G is attached to N, G = bond, (un)substituted alkylene, bivalent acyl or alkoxycarbonyl, and a bivalent alkoxy, alkylthio, aminoalkyl, sulfonyl, or sulfonamidyl wherein each of said G groups have at least one carbon atom attached to ring A; T = T1 when G-Ar is attached to T, and T2 when G-Ar is attached to M; M = M1 when G-Ar is attached to M, and M2 when G-Ar is attached to T; T1 and M1 = N, CR5; T2 and M2 = O, S, -N=, SO2, etc.; R1, R2, and R3 independently = H, halo, (un)substituted-alkyl, -alkenyl, NO2, etc.; R4 = H, (un)substituted alkyl, OH, NH2, alkoxy, etc.; R5 = H, (un)substituted alkyl, halo, CN, OH, etc.; J = O, S, -N=, SO2, substituted N, etc.; ], and pharmaceutically-acceptable salts, hydrates,enantiomers, and diastereomers, and prodrugs thereof, (I) are prepared and disclosed as inhibitors of LFA-1/ICAM and as anti-inflammatory agents. Thus, II was prepared by base catalyzed cyclization of 1-bromo-4-(1,4-dibromobutyl)benzene (preparation given) with 3-(3,5-dichlorophenyl)-1-methylimidazolidine-2,4-dione. Assays indicated I have a measurable level of activity as inhibitors of LFA-1 and/or ICAM (no data). The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).Application In Synthesis of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate

The Article related to hydantoin spiro preparation antiinflammatory nsaid lfa1 icam, spiro pyrrole imidazolinedione preparation, lymphocyte function associated antigen inhibitor spirohydantoin, intercellular adhesion mol inhibitor spirohydantoin and other aspects.Application In Synthesis of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate

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

On September 7, 2012, Grove, Charles I.; Di Maso, Michael J.; Jaipuri, Firoz A.; Kim, Michelle B.; Shaw, Jared T. published an article.Safety of (R)-Methyl 3-hydroxybutanoate The title of the article was Synthesis of 6,6′-Binaphthopyran-2-one Natural Products: Pigmentosin A, Talaroderxines A and B. And the article contained the following:

Efficient and stereoselective syntheses of pigmentosin A I, talaroderxine A II, and its diastereomer talaroderxine B III are reported. The binaphthyl ring system is assembled by vanadium-catalyzed phenolic coupling of tricyclic precursors. These key intermediates were prepared by Michael-Dieckmann annulation of a protected orsellinate ester, with the requisite pyranones accessed by a new variant of Ghosez’s sulfone-epoxide annulation. Preliminary biol. experiments are reported for pigmentosin. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Safety of (R)-Methyl 3-hydroxybutanoate

The Article related to pigmentosin a stereoselective synthesis coupling vanadium catalyst, michael dieckmann annulation stereoselective synthesis pigmentosin a talaroderxine, talaroderxine a b stereoselective synthesis coupling vanadium catalyst and other aspects.Safety of (R)-Methyl 3-hydroxybutanoate

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

Ping, Yuan-Ji; Zhou, Yi-Ming; Wu, Liang-Liang; Li, Zong-Rui; Gu, Xin; Wan, Xiao-Long; Xu, Zhen-Jiang; Che, Chi-Ming published an article in 2021, the title of the article was Fe-BPsalan complex catalyzed highly enantioselective Diels-Alder reaction of alkylidene β-ketoesters.Synthetic Route of 10472-24-9 And the article contains the following content:

A practical, highly efficient iron-catalyzed asym. Diels-Alder reaction of various alkylidene β-ketoesters with dienes was developed. Both cyclic and acyclic alkylidene β-ketoesters underwent the reaction well with the Fe-BPsalan complex as the catalyst to afford the addition products including estrone analogs in excellent yields, good to high diastereoselectivities and excellent enantioselectivities under mild reaction conditions. DFT calculations revealed the critical role of the steric effect in directing the reaction selectivity. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Synthetic Route of 10472-24-9

The Article related to iron bipyrrolindine salan complex catalyst preparation, alkylidene ketoester vinylalkene iron complex enantioselective diels alder reaction, butadiene alkylidene ketoester iron complex enantioselective diels alder reaction and other aspects.Synthetic Route of 10472-24-9

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

On September 30, 2022, Zhu, Wenyou; Tie, Yu; Zhu, Zhenyu; Yang, Yuxia; Feng, Shao; Liu, Jun published an article.Recommanded Product: Diethyl succinate The title of the article was The effects of an innovative pulping technique of synchronously pulping and gelatinizing treatment on raw materials properties, oenological parameters, fermentation process, and flavor characteristics of glutinous rice wine. And the article contained the following:

Liquid-state fermentation has been increasingly applied in the industrial glutinous rice wine (GRW) production However, products brewed by this emerging technique possess some deficiencies in flavor quality. Therefore, this study firstly developed and optimized an innovative pulping technique by the synchronously pulping and gelatinizing treatment (Process I) to improve GRW flavor quality, and then revealed the influences of Process I on raw materials properties, oenol. parameters, fermentation process, and flavor characteristics of GRW. Results show that Process I significantly (p < 0.05) enriched the soluble solid and crude protein content of glutinous rice milk by improving gelatinization degree and pulping efficiency, which consequently enhanced the microbial growth, glycolysis, and protein decomposition during the GRW fermentation process. GC-MS analyssis shows that Process I sequentially significantly (p < 0.05) enhanced the esterification and Ehrlich or Harrison pathway during the fermentation process. This contributed to a higher content of key ester and alc. compounds The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Recommanded Product: Diethyl succinate

The Article related to grm pulping gelatinizing raw material oenol parameter fermentation flavor, gas chromatography-mass spectrometry (gc–ms), glutinous rice wine, liquid-state fermentation, response surface methodology, volatile flavor compound and other aspects.Recommanded Product: Diethyl succinate

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

On December 27, 2002, Swenson, Rolf E.; Sowin, Thomas J.; Zhang, Henry Q. published an article.COA of Formula: C12H14F3NO2 The title of the article was Synthesis of Substituted Quinolines Using the Dianion Addition of N-Boc-anilines and α-Tolylsulfonyl-α,β-unsaturated Ketones. And the article contained the following:

A short and versatile synthesis of substituted quinolines is provided. Alkylation of sodium tolylsulfinate with bromomethyl- or chloromethyl ketones generates β-keto sulfones, e.g., I. Knoevenagel condensation of the β-keto sulfones with an aldehyde provides α-tolylsulfonyl-α,β-unsaturated ketones, e.g., II. Michael addition of the dianion of N-Boc-anilines in the presence of CuCN and LiCl with the unsaturated ketone generates a 1,4-adduct, which after deprotection of the Boc group and thermal elimination of the tolyl sulfone provides the quinoline, e.g., III. The experimental process involved the reaction of tert-Butyl (4-(trifluoromethyl)phenyl)carbamate(cas: 141940-37-6).COA of Formula: C12H14F3NO2

The Article related to sodium tolylsulfinate halomethyl ketone alkylation, keto sulfone preparation aldehyde knoevenagel condensation, unsaturated ketone tolylsulfonyl preparation aniline dianion michael addition elimination, quinoline preparation and other aspects.COA of Formula: C12H14F3NO2

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

On January 31, 2018, Cao, Shi-Xuan; Wang, Jia-Xi; He, Zheng-Jie published an article.Category: esters-buliding-blocks The title of the article was Magnetic nanoparticles supported cinchona alkaloids for asymmetric Michael addition reaction of 1,3-dicarbonyls and maleimides. And the article contained the following:

Magnetic nanoparticles Fe3O4@SiO2 supported cinchona alkaloids (quinine and quinidine) were successfully synthesized as magnetically recoverable organocatalysts and characterized by FT-IR, XPS, SEM measurements, and elemental anal. Their catalytic activity and stereoselectivity were preliminarily evaluated in the asym. Michael addition reaction of 1,3-dicarbonyl compounds and maleimides to afford 3-(2-oxocyclopentyl)pyrrolidine-2,5-dione derivatives I [R = H, Me, Bn, etc.; R1 = C(O)Me, CO2Et, CO2Me], 3-[3-acetyl-2-oxo-tetrahydrofuran-3-yl]-1-benzyl-pyrrolidine-2,5-dione and ethyl-2-[1-benzyl-2,5-dioxo-pyrrolidin-3-yl]-3-oxo-butanoate. The supported quinine catalyst exhibited good catalytic efficiency and modest to high enantioselectivity. The magnetic recoverability and recyclability of the catalyst were also examined The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Category: esters-buliding-blocks

The Article related to silica coated magnetic nanoparticle supported cinchona alkaloid preparation, pyrrolidinedione preparation enantioselective diastereoselective, dione maleimide michael magnetic nanoparticle supported cinchona alkaloid catalyst and other aspects.Category: esters-buliding-blocks

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

On November 2, 2006, Caroff, Eva; Fretz, Heinz; Hilpert, Kurt; Houille, Olivier; Hubler, Francis; Meyer, Emmanuel published a patent.Category: esters-buliding-blocks The title of the patent was Preparation of N-(4-pyrimidinylcarbonyl) amino acid piperazides and their use as P2Y12 receptor antagonists. And the patent contained the following:

The invention relates to the preparation of title compounds I [R1 = (un)substituted Ph; W = a bond and R2 = CN, halo/alkoxy/heterocyclyl/cyclo/cycloalkyl/alkyl, hetero/ary/, heterocyclyl, (partially) saturated heterocyclyl; (un)substituted hydroxyalkyl; W = CH2 and R2 = NR7R8, SR9, SO2R10; W = O, S, and R2 = alkoxycarbonyl/carboxy/hydroxy/alkoxy/heterocyclyl/cyclo/ar/heteroaryl/alkyl, hetero/aryl; W = NH and derivatives and R2 = H, dialkylamino/alkoxycarbonyl/hydroxy/alkoxy/cyclo/heterocyclyl/cycloalkyl/ar/diphenyl/heteroaryl/alkyl, aryl, 2-phenylcyclopropyl, COR11, SO2R12, (un)substituted carboxyalkyl; W = CH:CH and R2 = hydroxy/alkoxy/alkyl alkoxycarbonyl, Ph, or CONR13R14; ; or W = CC and R2 = H, hydroxy/alkoxy/alkyl; or W = CO and R2 = alkyl; W = NR3 and NR2R3 = 4-7 membered heterocyclyl; or W = NR3 and NR2R3 = (un)substituted imidazoyl, pyrazolyl, 1,2,3-triazolyl, etc.; R5a, R5b = independently H, Me; R3 = H, alkyl; R7 aryl/alkyl; or NR7R8 = (un)substituted 4-7 membered heterocyclyl; R9 = cycloalkyl, aryl; R10 = cyclo/alkyl, aryl; R11 = alkoxy/alkyl, hetero/aryl, etc.; R12 = alkyl, aryl; R13, R14 = independently alkyl; X = CO and R6 = cyclo/alkyl, alk(ynyl)oxy, aryloxy, aralkoxy, hetero/aryl,aralkyl or NH2 and derivatives; or X = SO2 and R6 = alkyl; Y = a bond and Z = H, aryl substituted by carboxyalkoxy; or Y = alkoxy/Ph/alkoxyphenyl/alkylene, alkoxyphenylene and Z = H, OH, NH2, CO2H, tetrazolyl, CONH2, COOR17, NHCOR17, NHSO2R17; R17 = alkyl], as P2Y12 receptor antagonists. The invention also relates to the use of pyrimidines I and their stereoisomers, salts, solvent complexes and morphol. forms, in the treatment and/or prevention of peripheral vascular, visceral-, hepatic- and renal-vascular, of cardiovascular and of cerebrovascular diseases (no data) or conditions associated with platelet aggregation (no data), particularly thrombosis (no data). Thus, a multi-step synthesis starting from Z-L-Glu(Ot-Bu)-OH (Z = benzyloxycarbonyl) and 1-ethoxycarbonylpiperazine was given for amino acid piperazide II. In a P2Y12 binding assay, II had an IC50 = 117 nM. The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).Category: esters-buliding-blocks

The Article related to amino acid piperazide preparation p2y12 receptor antagonist thrombosis, platelet aggregation pyrimidinylcarbonyl amino acid piperazide preparation, piperazino carbonylmethylaminocarbonylpyrimidine preparation p2y12 antagonist and other aspects.Category: esters-buliding-blocks

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

On May 31, 2022, Sheikh, Ishfaq Ahmad; Beg, Mohd Amin published an article.HPLC of Formula: 3319-31-1 The title of the article was Structural binding perspectives of common plasticizers and a flame retardant, BDE-153, against thyroxine-binding globulin: potential for endocrine disruption. And the article contained the following:

The human exposure to diverse endocrine-disrupting chems. (EDCs) has increased dramatically over several decades with very adverse health effects. Plasticizers and flame retardants constitute important classes of EDCs interfering in endocrine physiol. including the thyroid function. Thyroxine (T4) is an important hormone regulating metabolism and playing key roles in developmental processes. In this study, six phthalate and nonphthalate plasticizers and one flame retardant (BDE-153) were subjected to structural binding against thyroxine-binding globulin (TBG). The aim was to understand their potential role in thyroid dysfunction using structural binding approach. The structural study was performed using Schrodinger’s induced fit docking, followed by binding energy estimations of ligands and the mol. interaction anal. between the ligands and the amino acid residues in the TBG ligand-binding pocket. The results indicated that all the compounds packed tightly into the TBG ligand-binding pocket with similar binding pattern to that of TBG native ligand, T4. A high majority of TBG interacting amino acid residues for ligands showed commonality with native ligand, T4. The estimated binding energy values were highest for BDE-153 followed by nonphthalate plasticizer, DINCH, with values comparable with native ligand, T4. The estimated binding energy values of other plasticizers DEHP, DEHT, DEHA, ATBC, and TOTM were less than DINCH. In conclusion, the tight docking conformations, amino acid interactions, and binding energy values of the most of the indicated ligands were comparable with TBG native ligand, T4, suggesting their potential for thyroid dysfunction. The results revealed highest potential thyroid disruptive action for BDE-153 and DINCH. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).HPLC of Formula: 3319-31-1

The Article related to thyroxine binding globulin bde153 mol interaction docking, endocrine disruption, plasticizers, polybrominated diphenyl ethers (pbdes), structural binding characterization, thyroid dysfunction, thyroxine-binding globulin (tbg) and other aspects.HPLC of Formula: 3319-31-1

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

On April 15, 2018, Xu, Yangyang; Cai, Hao; Cao, Gang; Duan, Yu; Pei, Ke; Tu, Sicong; Zhou, Jia; Xie, Li; Sun, Dongdong; Zhao, Jiayu; Liu, Jing; Wang, Xiaoqi; Shen, Lin published an article.Product Details of 85-91-6 The title of the article was Profiling and analysis of multiple constituents in Baizhu Shaoyao San before and after processing by stir-frying using UHPLC/Q-TOF-MS/MS coupled with multivariate statistical analysis. And the article contained the following:

Baizhu Shaoyao San (BSS) is a famous traditional Chinese medicinal formula widely used for the treatment of painful diarrhea, intestinal inflammation, and diarrhea-predominant irritable bowel syndrome. According to clin. medication, three medicinal herbs (Atractylodis Macrocephalae Rhizoma, Paeoniae Radix Alba, and Citri Reticulatae Pericarpium) included in BSS must be processed using some specific methods of stir-frying. On the basis of the classical theories of traditional Chinese medicine, the therapeutic effects of BSS would be significantly enhanced after processing. Generally, the changes of curative effects mainly result from the variations of inside chem. basis caused by the processing procedure. To find out the corresponding changes of chem. compositions in BSS after processing and to elucidate the material basis of the changed curative effects, an optimized ultra-high-performance liquid chromatog.-quadrupole/time-of-flight mass spectrometry in pos. and neg. ion modes coupled with multivariate statistical analyses were developed. As a result, a total of 186 compounds were ultimately identified in crude and processed BSS, in which 62 marker compounds with significant differences between crude and processed BSS were found by principal component anal. and t-test. Compared with crude BSS, the contents of 23 compounds were remarkably decreased and the contents of 39 compounds showed notable increase in processed BSS. The transformation mechanisms of some changed compounds were appropriately inferred from the results. Furthermore, compounds with extremely significant differences might strengthen the effects of the whole herbal formula. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Product Details of 85-91-6

The Article related to baizhu shaoyao san constituent stir frying uhplc qtof ms, baizhu shaoyao san, chemical markers, multivariate statistical analysis, traditional chinese herbal formula, traditional chinese medicine processing, uhplc/q-tof-ms/ms and other aspects.Product Details of 85-91-6

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

Saidalimu, Ibrayim; Yoshioka, Takuya; Liang, Yumeng; Tokunaga, Etsuko; Shibata, Norio published an article in 2018, the title of the article was The CF3-DAST-induced deacylative trifluoromethylthiolation of cyclic 1,3-diketones/lactams/lactones and its extension to deacylative pentafluorophenylthiolation.Electric Literature of 517-23-7 And the article contains the following content:

A trifluoromethyl analog of diethylaminosulfur trifluoride (CF3-DAST)-induced deacylative trifluoromethylthiolation of cyclic 1,3-diketones, lactams, and lactones that provide cyclic α-trifluoromethylthioketones, lactams, and lactones is reported. To the best of knowledge, this method represents the first example of the trifluoromethylthiolation of lactams. A corresponding deacylative pentafluorophenylthiolation using a pentafluorophenyl analog of diethylaminosulfur trifluoride (C6F5-DAST) was also attempted. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Electric Literature of 517-23-7

The Article related to trifluoromethylthio cyclic ketone lactam lactone preparation, cyclic diketone lactam lactone deacylative trifluoromethylthiolation diethylaminosulfur trifluoride, lactam cyclic diketone deacylative pentafluorophenylthiolation and other aspects.Electric Literature of 517-23-7

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