- ANTIINFLAMMATORY AND ANTITUMOR 2-OXOTHIAZOLES AND 2-OXOTHIOPHENES COMPOUNDS
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A compound of formula (I) wherein X is O, C O or S; Y is N or CH; R2 and R4 are each independently H, -(CH2)pCOOH, -(CH2)pCON(R5)2 or - (CH2)pCOOC 1-6alkyI; or R2 and R4 together form a 6-membered phenyl ring fused to the five membered ring; each R1 is independently selected from H, halo (e.g. fluoro or chloro), C6-10aryl, C7-12arylalkyl, C2-12alkenyl; OC1-2 alkyl, OC2-12 aikenyl or a C1-12 alkyl group; each R5 is H or C1-6 alkyl; each p is 0 to 3; n is 1 to 4; or a salt, ester, solvate, N-oxide, or prodrug thereof, e.g. a salt thereof.
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- Inhibition of group IVA cytosolic phospholipase A2by thiazolyl ketones in vitro, ex vivo, and in vivo
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Group IVA cytosolic phospholipase A2(GIVA cPLA2) is the rate-limiting provider of pro-inflammatory mediators in many tissues and is thus an attractive target for the development of novel anti-inflammatory agents. In this work, we present the synthesis of new thiazolyl ketones and the study of their activities in vitro, in cells, and in vivo. Within this series of compounds, methyl 2-(2-(4-octylphenoxy)acetyl)thiazole-4-carboxylate (GK470) was found to be the most potent inhibitor of GIVA cPLA2, exhibiting an XI(50) value of 0.011 mole fraction in a mixed micelle assay and an IC50of 300 nM in a vesicle assay. In a cellular assay using SW982 fibroblast-like synoviocytes, it suppressed the release of arachidonic acid with an IC50value of 0.6 μM. In a prophylactic collagen-induced arthritis model, it exhibited an anti-inflammatory effect comparable to the reference drug methotrexate, whereas in a therapeutic model, it showed results comparable to those of the reference drug Enbrel. In both models, it significantly reduced plasma PGE2levels.
- Kokotos, George,Feuerherm, Astrid J.,Barbayianni, Efrosini,Shah, Ishita,S?ther, Mari,Magrioti, Victoria,Nguyen, Thuy,Constantinou-Kokotou, Violetta,Dennis, Edward A.,Johansen, Berit
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p. 7523 - 7535
(2015/01/08)
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- NEW ROUTES TO TRANS A,B-SUBSTITUTED BACTERIOCHLORINS
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Bacteriochlorin of Formula I: wherein R is H or silyl are described, along with compositions containing the same and methods of making and using the same.
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Page/Page column 79
(2013/05/21)
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- Conformational preferences for some 2-substituted N-methoxy-N- methylacetamides through spectroscopic and theoretical studies
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The analysis of the IR carbonyl band of the 2-substituted N-methoxy-N-methylacetamides Y-CH2C(O)N(OMe)Me (Y = F 1, OMe 2, OPh 3, Cl 4), supported by B3LYP/6-311++G(3df, 3pd) calculations along with the NBO analysis for 1-4, indicated the existence of cis-gauche conformers i.e. (c) and (g) for 1 and 3, (c1, c2) and (g1, g 2) for 2, and (c) and (g1, g2) for 4. In the gas phase, the g conformer population prevails over the c one, for 1 and 3, the (c1 + c2) population prevails over the (g1 + g2) one for 2, and the (g1 + g2) conformer population is more abundant than (c) one for 4. In n-hexane solution, the cis conformer is more abundant for 1-3. The occurrence of Fermi resonance in the νCO region, in n-hexane, precludes the estimative of relative populations of the (c, g1, g2) conformers for 4. The SCI-PCM calculations agree with the solvent effect on the νCO band component relative intensities for 1-3. NBO analysis showed that the n N → πco* orbital interaction is the main factor which stabilizes the gauche (g, g1, g2) conformers for 1-4 into a larger extent relative to the cis (c, c1, c2) ones. The nY → πco *, σC-Y → πco*, πco → σC-Y* and πco* → σC-Y* orbital interactions still contribute, but into a minor extent for the stabilization of the gauche conformers relative to the cis ones. The existence of some pyramidalization at the nitrogen atom of the Weinreb amides 1-4 is responsible for the occurrence of Yδ-(4)?Oδ-(9) and Y δ-(4)?Nδ-(7) short contacts in the gauche (g, g1, g2) conformers, which originates strong repulsive Coulombic interactions, acting in opposition to the large orbital stabilization of the gauche conformer with respect to the cis one. Therefore, a delicate balance of the Coulombic and orbital interactions seems to be responsible for the observed stabilization of the gauche (g, g1, g2) and cis (c, c1, c2) conformers, both in the gas phase and in the solution for 1-4. However, the cis conformer predominance, in non polar solvents, for the 2-substituted N-methoxy-N-methyl acetamides 1-3, bearing in α first raw (fluorine and oxygen) atoms, is in the opposite direction to the gauche conformer preference for the corresponding 2-substituted N,N-dialkyl-acetamides.
- Olivato, Paulo R.,Da Silva Gomes, Roberto,Rodrigues, Alessandro,Reis, Adriana K.C.A.,Domingues, Nelson L.C.,Rittner, Roberto,Dal Colle, Maurizio
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experimental part
p. 106 - 116
(2010/10/04)
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- A method for the synthesis of cyclopropanes by regiospecific and regioselective magnesium carbenoid 1, 3-CH insertion as the key reactions
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Addition reaction of two geometrical isomers of 1-chlorovinyl p-tolyl sulfoxides derived from unsymmetrical ketones and chloromethyl p-tolyl sulfoxide, with lithium enolate of tert-butyl acetate gave single diastereomers of the adduct, respectively. Treat
- Watanabe, Hiroyuki,Ogata, Shingo,Satoh, Tsuyoshi
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experimental part
p. 5675 - 5686
(2010/11/24)
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- Expedient synthesis of 3-alkoxymethyl- And 3-aminomethyl-pyrazolo[3,4-b] pyridines
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An effective strategy has been developed for the preparation of 3-alkoxymethyl-pyrazolo[3,4-b]pyridines, compounds that are currently not readily accessible by existing synthetic methods. Further manipulation of these compounds allows for access to 3-alkoxymethyl-pyrazolo[3,4-b]pyridines with a variety of substitution patterns as well as 3-aminomethyl-pyrazolo[3,4-b] pyridines.
- Beutner, Gregory L.,Kuethe, Jeffrey T.,Kim, Mary M.,Yasuda, Nobuyoshi
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supporting information; experimental part
p. 789 - 794
(2009/06/20)
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- ANTIBACTERIAL QUINOLINE DERIVATIVES
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The present invention relates to novel substituted quinoline derivatives according to the general Formula (Ia) or Formula (Ib): including any stereochemically isomeric form thereof, a N-oxide thereof, a pharmaceutically acceptable salt thereof or a solvate thereof. The claimed compounds are useful for the treatment of a bacterial infection. Also claimed is a composition comprising a pharmaceutically acceptable carrier and, as active ingredient, a therapeutically effective amount of the claimed compounds, the use of the claimed compounds or composit ions for the manufacture of a medicament for the treatment of a bacterial infection and a process for preparing the claimed compounds.
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Page/Page column 48
(2008/12/06)
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- Stereoselective reduction of β,δ-diketo esters. A novel strategy for the synthesis of artificial HMG-CoA reductase inhibitors
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Condensation of N-methoxy-N-methyl amides with the dianions of acetoacetates gives in good yields β,δ-diketo esters, which are reduced with Et2BOMe-NaBH4 in tetrahydrofuran-methanol highly selectively to give syn-β,δ-dihydroxy esters in one step. Similarly, the β,δ-diketo esters of the Taber's chiral alcohol or its enantiomer respectively are reduced to give syn-β,δ-dihydroxy esters of moderate enantiomeric excess. Higher diastereo- and enantioselectivity were achieved by reduction of the β,δ-diketo esters of the Taber's chiral alcohol or its enantiomer successively with diisobutylalane and with Et2BOMe-NaBH4. The resulting syn-diol esters were hydrolyzed and lactonized to give various types of β-hydroxy-δ-lactones commonly found in artificial HMG-CoA reductase inhibitors.
- Hiyama,Reddy,Minami,Hanamoto
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p. 350 - 363
(2007/10/02)
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- A FACILE ENTRY TO β,δ-DIKETO AND syn-β,δ-DIHYDROXY ESTERS
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Reaction of N-metoxy-N-methyl amides with the dianions of acetoacetates gives β,δ-diketo esters in yield of synthetic use, and the diketo esters were selectively reduced to syn-β,δ-dihydroxy esters, key intermediates of synthetic HMG-CoA reductase inhibit
- Hanamoto, Takeshi,Hiyama, Tamejiro
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p. 6467 - 6470
(2007/10/02)
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