6330-40-1Relevant academic research and scientific papers
K2S2O8mediated synthesis of 5-Aryldipyrromethanes and meso-substituted A4-Tetraarylporphyrins
Laha, Joydev K.,Hunjan, Mandeep Kaur
, p. 664 - 673 (2021/06/03)
The synthesis of dipyrromethanes from pyrrole and arylglyoxylic acids in the presence of K2S2O8at 90 C is reported affording dipyrromethanes in very good yields. Unlike an excess pyrrole traditionally used in dipyrromethane synthesis, the current method uses a stoichiometric amount of pyrrole avoiding any use of Br?nsted or Lewis acid. A gram scale synthesis of 5-phenyldipyrromethane is also achieved demonstrating potential scale up of dipyrromethanes using this method feasible. Subsequently, dipyrromethanes were converted to A4tetraarylporphyrins also in the presence of K2S2O8at 90C. A direct synthesis of A4-tetraphenylporphyrin from excess pyrrole and phenylglyoxylic acid in the presence of K2S2O8 at 90C is also reported.
Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions
Meng, Mengting,Wang, Guofang,Yang, Liangfeng,Cheng, Kai,Qi, Chenze
supporting information, p. 1218 - 1231 (2018/02/16)
Ynones are privileged building blocks in various organic syntheses of heterocyclic derivatives due to their multifunctional nature, and flavones are an important class of natural products with a wide range of biological activities. We describe the catalytic double decarboxylative alkynylation of arylpropiolic acids with α-keto acids. With Ag(I)/persulfate as the catalysis system, the valuable ynones bearing various substituents could be easily obtained. The introduction of hydroxyl substituent on ortho-site of α-keto acids make this strategy further applicable to the construction of flavone derivatives via heteroannulation in moderate to good yields with a similar silver-catalyzed system. The reactions proceed under relatively mild reaction conditions and tolerate a wide variety of functional groups. Control experiments indicated that both the reactions undergo radical processes. (Figure presented.).
CERTAIN PROTEIN KINASE INHIBITORS
-
Paragraph 0647, (2017/05/07)
Disclosed herein are protein kinase inhibitors, more particularly pyridazine derivatives and pharmaceutical compositions thereof, and method of use thereof.
CERTAIN PROTEIN KINASE INHIBITORS
-
Page/Page column 48, (2014/11/11)
Disclosed herein are protein kinase inhibitors,more particularly pyridazine derivatives and pharmaceutical compositions thereof,and method of use thereof.
Palladium-catalyzed decarboxylative acylation of O-methyl ketoximes with α-keto acids
Kim, Minyoung,Park, Jihye,Sharma, Satyasheel,Kim, Aejin,Park, Eonjeong,Kwak, Jong Hwan,Jung, Young Hoon,Kim, In Su
supporting information, p. 925 - 927 (2013/02/23)
A mild, practical and efficient palladium-catalyzed decarboxylative ortho-acylation of O-methyl ketoximes with α-keto acids via C-H bond activation is described. In these reactions, a broad range of O-methyl ketoximes and α-keto acids undergoes the decarboxylative cross-coupling reactions with high selectivities and good tolerance. The Royal Society of Chemistry 2013.
Pd(ii)-catalyzed decarboxylative acylation of phenylacetamides with α-oxocarboxylic acids via C-H bond activation
Park, Jihye,Kim, Minyoung,Sharma, Satyasheel,Park, Eonjeong,Kim, Aejin,Lee, Sang Hwi,Kwak, Jong Hwan,Jung, Young Hoon,Kim, In Su
supporting information, p. 1654 - 1656 (2013/03/14)
A palladium-catalyzed decarboxylative acylation of phenylacetamides with α-oxocarboxylic acids via C-H bond activation is described. This protocol provides efficient access to a range of ortho-acyl phenylacetamides, which can be easily converted to 3-isochromanone derivatives. The Royal Society of Chemistry 2013.
Palladium-catalyzed decarboxylative acylation of O-phenyl carbamates with α-oxocarboxylic acids at room temperature
Sharma, Satyasheel,Kim, Aejin,Park, Eonjeong,Park, Jihye,Kim, Minyoung,Kwak, Jong Hwan,Lee, Sang Hwi,Jung, Young Hoon,Kim, In Su
supporting information, p. 667 - 672 (2013/04/11)
A palladium-catalyzed oxidative acylation of O-phenyl carbamates with α-oxocarboxylic acids via selective aromatic C-H bond activation is described. This protocol represents the first ortho-acylation of phenol derivatives, and a catalytic amount of triflic acid additive is crucial for this transformation. Copyright
COMPOUNDS FOR THE INHIBITION OF CELLULAR PROLIFERATION
-
Page/Page column 129-130, (2012/02/01)
Compositions and methods for inhibiting translation are provided. Compositions, methods and kits for treating (1) cellular proliferative disorders, (2) non-proliferative, degenerative disorders, (3) viral infections, (4) disorders associated with viral infections, and/or (5) non-proliferative metabolic disorders such as type II diabetes where inhibition of translation initiation is beneficial using the compounds disclosed herein.
Oxidation of some α-hydroxy acids by tetraethylammonium chlorochromate: A kinetic and mechanistic study
Swami, Preeti,Yajurvedi,Mishra,Sharma, Pradeep K.
experimental part, p. 50 - 55 (2010/04/06)
The oxidation of glycolic, lactic, malic, and a few substituted mandelic acids by tetraethylammonium chlorochromate (TEACC) in dimethylsulfoxide leads to the formation of corresponding oxoacids. The reaction is first order each in TEACC and hydroxy acids. Reaction is failed to induce the polymerization of acrylonitrile. The oxidation of α-deuteriomandelic acid shows the presence of a primary kinetic isotope effect (kH/kD = 5.63 at 298 K). The reaction does not exhibit the solvent isotope effect. The reaction is catalyzed by the hydrogen ions. The hydrogen ion dependence has the following form: kobs = a + b[H+ ]. Oxidation of p-methylmandelic acid has been studied in 19 different organic solvents. The solvent effect has been analyzed by using Kamlet's and Swain's multiparametric equations. A mechanism involving a hydride ion transfer via a chromate ester is proposed.
Kinetics and mechanism of the oxidation of some α-hydroxy carboxylic acids by [bis(trifluoroacetoxy)iodo]benzene
Banerji, Jayshree,Sharma, Pradeep K.,Banerji, Kalyan K.
, p. 445 - 448 (2008/02/09)
The oxidation of α-hydroxy carboxylic acids by [bis(trifluoroacetoxy) iodo]benzene (TFAIB), to the corresponding oxoacids is first order with respect to each, the hydroxy acid, TFAIB and hydrogen ions. The oxidation of α-deuteriomandelic acid (PhCDOHCO2H) exhibits the presence of a substantial primary isotope effect confirming the cleavage of the α - C - H bond in the rate-determining step. The rate of oxidation of substituted mandelic acids correlates well with Brown's σ+ values with large negative reaction constants. A mechanism involving transfer of a hydride ion from the hydroxy acid to the oxidant has been postulated.
