- Synthesis and SAR of potent inhibitors of the Hepatitis C virus NS3/4A protease: Exploration of P2 quinazoline substituents
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Novel NS3/4A protease inhibitors comprising quinazoline derivatives as P2 substituent were synthesized. High potency inhibitors displaying advantageous PK properties have been obtained through the optimization of quinazoline P2 substituents in three series exhibiting macrocyclic P2 cyclopentane dicarboxylic acid and P2 proline urea motifs. For the quinazoline moiety it was found that 8-methyl substitution in the P2 cyclopentane dicarboxylic acid series improved on the metabolic stability in human liver microsomes. By comparison, the proline urea series displayed advantageous Caco-2 permeability over the cyclopentane series. Pharmacokinetic properties in vivo were assessed in rat on selected compounds, where excellent exposure and liver-to-plasma ratios were demonstrated for a member of the 14-membered quinazoline substituted P2 proline urea series.
- Nilsson, Magnus,Belfrage, Anna Karin,Lindstroem, Stefan,Waehling, Horst,Lindquist, Charlotta,Ayesa, Susana,Kahnberg, Pia,Pelcman, Mikael,Benkestock, Kurt,Agback, Tatiana,Vrang, Lotta,Terelius, Ylva,Wikstroem, Kristina,Hamelink, Elizabeth,Rydergard, Christina,Edlund, Michael,Eneroth, Anders,Raboisson, Pierre,Lin, Tse-I,de Kock, Herman,Wigerinck, Piet,Simmen, Kenneth,Samuelsson, Bertil,Rosenquist, Asa
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scheme or table
p. 4004 - 4011
(2010/08/06)
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- Macrocyclic Inhibitors of Hepatitis C Virus
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Compounds of the formula (I): and N-oxides, salts and stereoisomers thereof wherein A is OR1, NHS(═O)pR2, NHR3, NRaRb, C(═O)NHR3 or C(═O)NRaRb wherein; R1 is hydrogen, C1-C6alkyl, C0-C3alkylenecarbocyclyl, C0-C3alkyleneheterocyclyl; R2 is C1-C6alkyl, C0-C3alkylenecarbocyclyl, C0-C3alkyleneheterocyclyl or NRaRb; R3 is C1-C6alkyl, C0-C3alkylenecarbocyclyl, C0-C3alkyleneheterocyclyl, —OC1-C6alkyl, —OC0-C3alkylenecarbocyclyl, —OC0-C3alkyleneheterocyclyl; wherein any alkyl, carbocyclyl or heterocycylyl in R1, R2 or R3 are optionally substituted p is independently 1 or 2; n is 3, 4, 5 or 6; denotes an optional double bond; Rq is H or when L is CRz, Rq can also be C1-C6alkyl; Ry and Ry′ are independently C1-C6alkyl; L is N or CRz; Rz is H or forms a double bond with the asterisked carbon; W is —CH2—, —O—, —OC(═O)NH—, —OC(═O)—, —S—, —NH—, —NRa, —NHS(═O)2—, —NHC(=0)NH— or —NHC(═O)—, —NHC(═S)NH— or a bond; R8 is an optionally substituted ring system containing 1 or 2 saturated, partially saturated or unsaturated carbo or heterocyclic rings have utility in the inhibition of NS-3 serine proteases, such as flavivirus infections.
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Page/Page column 54
(2009/02/11)
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- Macrocylic Inhibitors of Hepatitis C Virus
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Compounds of the formula I: and N-oxides, salts, and stereoisomers thereof wherein A is OR1, NHS(═O)pR2; wherein; R1 is hydrogen, C1-C6alkyl, C0-C3alkylenecarbocyclyl, C0-C3alkylene-heterocyclyl;R2 is C1-C6alkyl, C0-C3alkylenecarbocyclyl, C0-C3alkyleneheterocyclyl;p is independently 1 or 2;n is 3, 4, 5 or 6; — denotes an optional double bond;L is N or CRz; Rz is H or forms a double bond with the asterisked carbon;Rq is H or when L is CRz, Rq can also be C1-C6alkyl;Rr is quinazolinyl, optionally substituted with one two or three substituents each independently selected from C1-C6 alkyl, C1-C6alkoxy, hydroxyl, halo, haloC1-C6alkyl, amino, mono- or dialkylamino, mono- or dialkylaminocarbonyl, C1-C6alkyl-carbonylamino, C0-C3alkylenecarbocyclyl and C0-C3 alkyleneheterocyclyl;R5 is hydrogen, C1-C6alkyl, C1-C6alkoxyC1-C6alkyl or C3-C7cycloalkyl;R6 is hydrogen, C1-C6alkyl, C1-C6alkoxy, C0-C3alkylenecarbocyclyl, C0-C3alkylene-heterocyclyl, hydroxy, bromo, chloro or fluoro have utility in the treatment or prophylaxis of flaviviral infections such as HCV
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Page/Page column 34
(2009/05/28)
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- HCV NS-3 serine protease inhibitors
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HCV inhibitors, compositions comprising these compounds as active ingredient, as well as processes for preparing these compounds, having the formula I wherein A is
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- HCV NS-3 serine protease inhibitors
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HCV inhibitors, compositions comprising these compounds as active ingredient, as well as processes for preparing these compounds, of formula: wherein A is
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- Room-temperature debenzylation of N-benzylcarboxamides by N-bromosuccinimide
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A simple and highly efficient method has been developed with which to cleave the N-benzyl group on N-mono- or disubstituted carboxamides using N-bromosuccinimide (NBS) at room temperature. All the 31 substrates examined showed moderate to excellent deprotection yields. Our study also indicated that the debenzylation may involve an oxygen/light initiated free radical mechanism. Georg Thieme Verlag Stuttgart.
- Kuang, Liping,Zhou, Jing,Chen, Sheng,Ding, Ke
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p. 3129 - 3134
(2008/03/28)
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- 1,2,3-Benzotriazin-4-ones and related systems. Part II. Thermolytic decomposition of substituted 1,2,3-benzotriazin-4-ones and isatoic anhydrides
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Several nuclear-substituted 1,2,3-benzotriazin-4-ones have been thermolysed in an inert solvent. In each case the major identifiable product proved to be a 2-(o-aminophenyl)-3,1-benzoxazin-4-one. Nuclear-substituted isatoic anhydrides on thermolysis behaved similarly.
- Archer, John G.,Barker, Alan J.,Smalley, Robert K.
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p. 1169 - 1173
(2007/10/06)
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