- Fluorine Effects on Group Migration via a Rhodium(V) Nitrenoid Intermediate
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An unprecedented rhodium(III)-catalyzed hydroarylation of α,α-difluoromethylene alkynes with N-pivaloxyl aroylamides through sequential C?H activation and aryl migration is detailed herein. A large array of α,α-difluoromethylene alkynes and N-pivaloxyl aryl amides were amenable to this transformation, thus providing a novel synthetic protocol for the construction of difluorinated 2-alkenyl aniline derivatives in high yields and with excellent regioselectivity. Notably, unique fluorine effects were found to underlie the thus unconventional reaction manifold.
- Wang, Cheng-Qiang,Zhang, Yu,Feng, Chao
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supporting information
p. 14918 - 14922
(2017/10/12)
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- Synthesis of carbon-11-labeled 4-(phenylamino)-pyrrolo[2,1-f][1,2,4] triazine derivatives as new potential PET tracers for imaging of p38α mitogen-activated protein kinase
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The reference standards methyl 4-(2-methyl-5-(methoxycarbamoyl)phenylamino) -5-methylpyrrolo[2,1-f][1,2,4]triazine-6-carboxylate (10a), methyl 4-(2-methyl-5-(ethoxycarbamoyl)phenylamino)-5-methylpyrrolo[2,1-f][1,2,4] triazine-6-carboxylate (10b) and corre
- Wang, Min,Gao, Mingzhang,Zheng, Qi-Huang
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p. 3700 - 3705
(2014/09/17)
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- SUBSTITUTED PYRIDINE UREA COMPOUNDS
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The present disclosure provides pyridine urea compounds useful in the treatment of p38 kinase mediated diseases, such as lymphoma and auto-inflammatory disease, having the structure of Formula (I): wherein R1, R2, R3, Rsu
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Page/Page column 23
(2012/06/16)
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- CARBOXYLIC ACID ARYL AMIDES
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Compounds of formula and pharmaceutically acceptable salts thereof are described, as well as the pharmaceutical compositions containing said compounds and their pharmaceutically acceptable salts, and the use of said compounds and pharmaceutical compositions for the treatment, control or amelioration of proliferative diseases, including cancer.
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- Design, synthesis, and anti-inflammatory properties of orally active 4-(phenylamino)-pyrrolo[2,1-f][1,2,4]triazine p38α mitogen-activated protein kinase inhibitors
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A novel structural class of p38 mitogen-activated protein (MAP) kinase inhibitors consisting of substituted 4-(phenylamino)-pyrrolo[2,1-f][1,2,4] triazines has been discovered. An initial subdeck screen revealed that the oxindole-pyrrolo[2,1-f][1,2,4]tria
- Hynes Jr., John,Dyckman, Alaric J.,Lin, Shuqun,Wrobleski, Stephen T.,Wu, Hong,Gillooly, Kathleen M.,Kanner, Steven B.,Lonial, Herinder,Loo, Derek,McIntyre, Kim W.,Pitt, Sidney,Ding, Ren Shen,Shuster, David J.,Yang, XiaoXia,Zhang, Rosemary,Behnia, Kamelia,Zhang, Hongjian,Marathe, Punit H.,Doweyko, Arthur M.,Tokarski, John S.,Sack, John S.,Pokross, Matthew,Kiefer, Susan E.,Newitt, John A.,Barrish, Joel C.,Dodd, John,Schieven, Gary L.,Leftheris, Katerina
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- PHENYL-ANILINE SUBSTITUTED BICYCLIC COMPOUNDS USEFUL AS KINASE INHIBITORS
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Compounds having the formula (I), and pharmaceutically acceptable salts, prodrugs, and solvates thereof, are useful as kinase inhibitors, wherein R, R1 , R2, R5, R6a, R6b, J, K, X and Z are as described in the specification.
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Page/Page column 46; 47
(2010/02/11)
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- Fine tuning of the cation affinity of artificial receptors based on cyclic peptides by intramolecular conformational control
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A series of cyclic hexapeptides consisting of alternating 4-substituted 3-aminobenzoic acid units (R = CH3, Cl, CH2OCH3, OCH3, COOCH3) and residues of the natural amino acid proline has been prepared and their ion affinities have been investigated. Whereas the unsubstituted parent compound (R = H) is able to bind cations through cation-π interactions with the aromatic subunits, as well as anions through hydrogen bonding with the peptide NH groups, the introduction of substituents at the 4-positions of the aromatic rings results in complete loss of the anion affinity. The cation complex stabilities depend on the substituents and cover a wide range from Ka = 140 M-1 for R = CH3 to Ka = 10800 M-1 for R = COOCH3 (Ka = 1260 M-1 for R = H) with n-butyltrimethylammonium picrate. The conformations of the peptides in solution have been determined by one-and two-dimensional NMR techniques and FT-IR spectroscopy. It was found that all the substituents prevent the peptides from adopting the necessary conformation for anion binding. For one receptor (R = OCH3), the results have been corroborated by a crystal structure determination. AM1 calculations have been used to estimate the electrostatic potential surfaces of the substituted aromatic subunits. The variation in the cation complex stabilities can be mainly attributed to the effects of the substituents on the solution conformations of the peptides. The influence of the substituents on the electrostatic potentials of the aromatic peptide subunits appears to be less important.
- Kubik, Stefan,Goddard, Richard
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p. 311 - 322
(2007/10/03)
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