24314-70-3Relevant academic research and scientific papers
Palladium-Catalyzed Asymmetric Markovnikov Hydroxycarbonylation and Hydroalkoxycarbonylation of Vinyl Arenes: Synthesis of 2-Arylpropanoic Acids
Guan, Zheng-Hui,Ren, Zhi-Hui,Wang, Yuan,Yang, Hui-Yi,Yao, Ya-Hong,Zou, Xian-Jin
supporting information, p. 23117 - 23122 (2021/09/18)
Asymmetric hydroxycarbonylation is one of the most fundamental yet challenging methods for the synthesis of carboxylic acids. Herein, we reported the development of a palladium-catalyzed highly enantioselective Markovnikov hydroxycarbonylation of vinyl arenes with CO and water. A monodentate phosphoramidite ligand L6 plays vital role in the reaction. The reaction tolerates a range of functional groups, and provides a facile and atom-economical approach to an array of 2-arylpropanoic acids including several commonly used non-steroidal anti-inflammatory drugs. The catalytic system has also enabled an asymmetric Markovnikov hydroalkoxycarbonylation of vinyl arenes with alcohols to afford 2-arylpropanates. Mechanistic investigations suggested that the hydropalladation is irreversible and is the regio- and enantiodetermining step, while hydrolysis/alcoholysis is probably the rate-limiting step.
Iridium-Catalyzed α-Methylation of α-Aryl Esters Using Methanol as the C1 Source
Tsukamoto, Yuya,Itoh, Satoshi,Kobayashi, Masaki,Obora, Yasushi
, p. 3299 - 3303 (2019/05/10)
IrCl(cod)2]/dppe-catalyzed α-methylation of aryl esters using methanol as the C1 source was developed. This methylation process is useful in several fields including organic chemistry, biochemistry, and medicinal chemistry. Readily available methanol as methylation reagent was successfully adapted. The reaction processed high atom economy and efficient. By applying the reaction system, the synthesis method of naproxen was provided.
Stereodivergent coupling of aldehydes and alkynes via synergistic catalysis using Rh and Jacobsen's amine
Cruz, Faben A.,Dong, Vy M.
supporting information, p. 1029 - 1032 (2017/05/15)
We report an enantioselective coupling between α-branched aldehydes and alkynes to generate vicinal quaternary and tertiary carbon stereocenters. The choice of Rh and organocatalyst combination allows for access to all possible stereoisomers with high enantio-, diastereo-, and regioselectivity. Our study highlights the power of catalysis to activate two common functional groups and provide access to divergent stereoisomers and constitutional structures.
Stereodivergent Coupling of Aldehydes and Alkynes via Synergistic Catalysis Using Rh and Jacobsen's Amine
Cruz, Faben A.,Dong, Vy M.
supporting information, p. 1029 - 1032 (2021/09/04)
We report an enantioselective coupling between α-branched aldehydes and alkynes to generate vicinal quaternary and tertiary carbon stereocenters. The choice of Rh and organocatalyst combination allows for access to all possible stereoisomers with high ena
SUBSTITUTED CATHECHOLS AS INHIBITORS OF IL-4 AND IL-5 FOR THE TREATMENT BRONCHIAL ASTHMA
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, (2014/05/20)
The present invention relates to compounds of general formula 1 for the treatment of bronchial asthma by inhibition of IL-4 or IL-5 pathway inhibition. The present invention also relates to the use of compound of general formula 1 for the treatment of bronchial by inhibition of IL-4 or IL-5 pathway. The present invention also relates to the method of treating asthma by inhibition of IL-4 or IL-5 pathway by administration of compound or said composition through oral, intranasal, route or by inhalation to a mammal in need thereof. Compound of general formula 1 may be used for reducing perivascular and peribronchial inflammation.
INHIBITORS OF PHOSPHATIDYLINOSITOL-3-KINASE (PI3) AND INDUCERS OF NITRIC OXIDE (NO)
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Page/Page column 25-26, (2010/08/04)
The present invention relates to compounds of general formula 1 for the treatment of malignancy by inhibition of PI3-Akt pathway and or induction of NO. The present invention also relates to the use of compound of general formula 1 for the treatment of malignancy by inhibition of PI3-Akt pathway and or induction of NO. The present invention further relates to a method of treating malignancy by inhibition of PI3-Akt pathway and or induction of NO by administration of compound or said composition to a mammal in need thereof.
Structure-activity study of 2,3-benzodiazepin-4-ones noncompetitive AMPAR antagonists: Identification of the 1-(4-amino-3-methylphenyl)-3,5-dihydro-7,8-ethylenedioxy-4H-2,3-benzodiazepin-4-one as neuroprotective agent
Micale, Nicola,Colleoni, Simona,Postorino, Giovanna,Pellicano, Alessia,Zappala, Maria,Lazzaro, John,Diana, Valentina,Cagnotto, Alfredo,Mennini, Tiziana,Grasso, Silvana
, p. 2200 - 2211 (2008/12/20)
In the search for AMPA receptor (AMPAR) antagonists, 2,3-benzodiazepines represent a family of specific noncompetitive antagonists with anticonvulsant and neuroprotective properties. We have previously shown that 2,3-benzodiazepin-4-ones possess marked an
Synthesis, chiral resolution, and enantiopharmacology of a potent 2,3-benzodiazepine derivative as noncompetitive AMPA receptor antagonist
Zappalà, Maria,Postorino, Giovanna,Micale, Nicola,Caccamese, Salvatore,Parrinello, Nunziatina,Grazioso, Giovanni,Roda, Gabriella,Menniti, Frank S.,De Sarro, Giovambattista,Grasso, Silvana
, p. 575 - 581 (2007/10/03)
This paper describes the synthesis of racemic 3,5-dihydro-5-methyl-7,8- methylenedioxy-4H-2,3-benzodiazepin-4-one (±)-5, attempted stereoselective synthesis of its enantiomers, chiral HPLC resolution of the racemate, and assignment of the absolute configuration. Enantiomer (5S)-(-)-5 is provided with an in vivo unticonvulsant activity 8 times higher than its enantiomer (5R)-(+)-5. This result is confirmed in the in vitro test by the ability to inhibit the kainate-induced increase of the [Ca2+] i in a primary culture of rat cerebellar granule cells which express α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptors. Binding affinity of compound (±)-5 at the AMPA and N-methyl-D-aspartic acid (NMDA) receptors was also evaluated.
SUBSTITUTED 2,3-BENZODIAZEPIN-4-ONES AND THE USE THEREOF
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, (2010/02/06)
The invention relates to substituted 2,3-benzodiazepin-4-ones which are antagonists or positive modulators of AMPA receptors, and the use thereof for treating, preventing or ameliorating neuronal loss associated with stroke, global and focal ischemia, CNS
SUBSTITUTED 2,3-BENZODIAZEPIN-4-ONES AND THE USE THEREOF
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, (2008/06/13)
The invention relates to substituted 2,3-benzodiazepin-4-ones which are antagonists or positive modulators of AMPA receptors, and the use thereof for treating, preventing or ameliorating neuronal loss associated with stroke, global and focal ischemia, CNS trauma, hypoglycemia and surgery, as well as treating or ameliorating neurodegenerative diseases including Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease, Parkinson's disease and Down's syndrome, treating, preventing or ameliorating the adverse consequences of the overstimulation of the excitatory amino acids, treating or ameliorating anxiety, psychosis, convulsions, chronic pain, glaucoma, CMV retinitis, urinary incontinence, muscular spasm and inducing anesthesia, as well as for treating or ameliorating the adverse consequences of excitatory amino acid deficiency such as schizophrenia, Alzheimer's disease and malnutrition and neural maldevelopment, and as cognition enhancers. The invention also is directed to the process for the preparation of the substituted 2,3-benzodiazepin-4-ones.
