80937-23-1Relevant academic research and scientific papers
Base-Promoted Annulative Difluoromethylenation of Enaminones with BrCF2CO2Et toward 2,2-Difluorinated 2,3-Dihydrofurans
Ying, Jinbiao,Liu, Ting,Liu, Yunyun,Wan, Jie-Ping
, p. 2404 - 2408 (2022/04/07)
A practical method for the synthesis of 2,2-difluorinated 2,3-dihydrofurans has been established via the [4 + 1] annulation of enaminones and BrCF2CO2Et with Na2CO3 promotion. This new protocol does not employ any transition metal reagent and enables the annulative difluoromethylation by the partial cleavage of the C═C double bond. In addition, the further treatment with hydrochloric acid in one pot leads to β-keto enoic acids (4-oxo-2-butenoic acids) via a formal enaminone C-N carboxylation.
Design, synthesis, and bioevaluation of a novel class of (E)-4-oxo-crotonamide derivatives as potent antituberculosis agents
Ren, Jinfeng,Xu, Jian,Zhang, Guoning,Xu, Changliang,Zhao, LiLi,You, XueFu,Wang, Yucheng,Lu, Yu,Yu, Liyan,Wang, Juxian
, p. 539 - 543 (2019/01/09)
A series of novel (E)-4-oxo-2-crotonamide derivatives were designed and synthesized to find potent antituberculosis agents. All the target compounds were evaluated for their in vitro activity against Mycobacterium tuberculosis H37Rv(MTB). Results reveal that 4-phenyl moiety at part A and short methyl group at part C were found to be favorable. Most of the derivatives displayed promising activity against MTB with MIC ranging from 0.125 to 4 μg/mL. Especially, compound IIIa16 was found to have the best activity with MIC of 0.125 μg/mL against MTB and with MIC in the range of 0.05–0.48 μg/mL against drug-resistant clinical MTB isolates.
Substituted 4-oxo-crotonic acid derivatives as a new class of protein kinase B (PknB) inhibitors: synthesis and SAR study
Xu, Changliang,Bai, Xiaoguang,Xu, Jian,Ren, Jinfeng,Xing, Yun,Li, Ziqiang,Wang, Juxian,Shi, Jingjing,Yu, Liyan,Wang, Yucheng
, p. 4763 - 4775 (2017/02/05)
Protein kinase B (PknB) is an essential serine/threonine protein kinase required for Mycobacterium tuberculosis (M. tb) cell division and cell-wall biosynthesis. A high throughput screen using PknB identified a (E)-4-oxo-crotonic acid inhibitor, named YH-8, which was used as a scaffold for SAR investigations. A significant improvement in enzyme affinity was achieved. The results indicated that the α,β-unsaturated ketone scaffold and “trans-” configuration are essential for the activity against PknB. And compounds with an aryl group, especially with electron-withdrawing substituents on benzene ring, exhibited four fold potency than that of YH-8.
Application of 4-oxo-2-crotonamide derivative to preparation of bacteriostatic agents
-
Paragraph 0072; 0073; 0074; 0121; 0122, (2017/07/22)
The invention discloses application of a 4-oxo-2-crotonamide derivative to preparation of bacteriostatic agents. The structure of the 4-oxo-2-crotonamide derivative is shown as a formula (I). The 4-oxo-2-crotonamide derivative has a bacteriostatic effect; good antibacterial activity can be realized on methicillin-resistant staphylococcus aureus, methicillin-resistant staphylococcus epidermidis, vancomycin drug-resistant enterococcus faecalis, vancomycin drug-resistant enterococcus faecium, methicillin-sensitive staphylococcus aureus, methicillin-sensitive staphylococcus epidermidis, vancomycin-sensitive enterococcus faecalis and vancomycin-sensitive enterococcus faecium. The formula I is shown in the description.
An efficient synthesis of β-Aroylacrylic acid ethyl ester by the Friedel-Crafts reaction in the presence of diethyl sulfate
Onoue, Ken-Ichi,Shintou, Taichi,Zhang, Chang Shan,Itoh, Isamu
, p. 22 - 23 (2007/10/03)
An β-Aroylacrylic acid ethyl ester such as ethyl (E)-4-(3,4- dimethoxyphenyl)-4-oxo-2-butenoate (1) can be obtained in good yield and with excellent purity by way of the Friedel-Crafts reaction in which 1,2-dimethoxybenzene (2) is treated with maleic anhydride (3) and aluminum chloride in the presence of diethyl sulfate (4) under mild conditions. Copyright
PROCESS FOR PRODUCING 4-PHENYL-4-OXO-2-BUTENOIC ESTER DERIVATIVE
-
Page/Page column 24, (2010/02/10)
A 4-phenyl-4-oxo-2-butenoate derivative is stably supplied in a short period of time, at low cost, in high purity and on an industrial scale by a process for producing the 4-phenyl-4-oxo-2-butenoate derivative, which comprises simultaneously or continuously reacting a sulfuric ester, an aromatic hydrocarbon and a maleic anhydride derivative.
Synthetic Studies on O-Heterocycles via Cycloadditions. Part 2. Adducts from Styrene Oxides
Clawson, Paul,Lunn, Patricia M.,Whiting, Donald A.
, p. 159 - 162 (2007/10/02)
The styrene oxides (14) and (15), bearing electron-withdrawing functions, readily undergo thermal and photochemical (triplet sensitised) dipolar cycloadditions with simple electron-deficient olefins, regioselectively in the case of methyl acrylate.However, cycloadditions with 5-arylbutenolides as dipolarophiles, required for lignan synthesis, could not be effected in significant yield.A new short route to 5-arylbut-2-enolides was devised.The dihydro- and tetrahydro-furan adducts (18d), (19d), and (20d) all fragment in base to the dienol nitrile (25).
Gastric anti-secretory, anti-ulcer and cytoprotective properties of substituted (E)-4-phenyl- and heteroaryl-4-oxo-2-butenoic acids
Bianchi, Mario,Butti, Alina,Christidis, Yani,Perronnet, Jacques,Barzaghi, Fernando,et al.
, p. 45 - 52 (2007/10/02)
A class of anti-secretory, anti-ulcer and cytoprotective agents, the substituted (E)-4-phenyl and heteroaryl-4-oxo-2-butenoic acids, is described.This chemical structure is not related to those of any known anti-cholinergic drugs, histamine H2-receptor antagonists or prostaglandins.Five compounds, 4-(2-methoxyphenyl)- 15, 4-(4-methoxyphenyl)- 22, 4-(3,4-dimethoxyphenyl)- 32, 4-(3,4,5-trimethoxyphenyl)- 40, and 4-(2-furanyl)-4-oxo-2-butenoic acid 44, have cytoprotective activity at a very low dose (0.6 mg/kg, p.o.) and anti-secretory and anti-ulcer activities at higher doses.One of these compounds, RU 38086 40, has been selected for clinical evaluation.Keywords - anti-ulcer agents / cytoprotective agents / (E)-4-phenyl- and heteroaryl-4-oxo-2-butenoic acids.
3-benzoyl-2-mercaptopropionic acid derivatives
-
, (2008/06/13)
3-Benzoyl-2-mercaptopropionic acid derivatives represented by the general formula STR1 (wherein, X represents a hydrogen atom, a halogen atom, hydroxy group, a lower alkyl group or a lower alkoxy group, Y represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, Z represents a hydrogen atom or an acyl group, and R represents a hydrogen atom or a lower alkyl group). These compounds have immunomodulative function and are effective for the treatment of diseases caused by abnormal immunofunction.
Gastro-protecting activity
-
, (2008/06/13)
Diseases and ailments accompanied by gastric and gastroduodenal lesions treated by administering a compound of the formula (I) STR1 in which R represents hydrogen or alkyl containing 1 to 5 carbon atoms and R1 and R2, identical or different, both represent alkoxy containing 1 to 3 carbon atoms, or both represent halogen, or R1 represents hydrogen and R2 represents halogen, nitro or trifluoromethyl, or R1 and R2 form a methylenedioxy group at adjacent carbon atoms, as well as pharmaceutically acceptable salts thereof, particularly alkali metal, alkaline earth metal, or amine salts of said acid.
