乙烷1,2-舒马坦在30°C下的ap K a为12.12±0.06,并且其碱水解速率显示出pH依赖性,反映了这一点,因此在高于p K a的pH值下观察到的拟一级反应速率常数为pH值无关。没有证据表明相邻的基团参与N -α-羧基苄基乙烷-1,2-亚马六胺或N-(羟氨基羰基甲基)-2-苄基乙烷-1,2-亚马六胺的水解。通过产物分析和动力学溶剂同位素效应确认,通过亲核开环反应,氧合阴离子而不是胺或硫醇与水中的N-苯甲酰基乙烷-1,2-磺酰胺反应。该反应的布朗斯台德图与β有两个明显的相关性 尽管经统计学校正的图可能指示单一相关性,但弱碱和强碱的nuc分别为0.52和0.65。
[EN] 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE AND 6,7-DIHYDRO-4H-TRIAZOLO[1,5-A]PYRAZINE COMPOUNDS FOR THE TREATMENT OF INFECTIOUS DISEASES<br/>[FR] COMPOSÉS 6,7-DIHYDRO-4H-PYRAZOLO[1,5-A]PYRAZINE AND 6,7-DIHYDRO-4H-TRIAZOLO[1,5-A]PYRAZINE POUR LE TRAITEMENT DES MALADIES INFECTIEUSES
申请人:HOFFMANN LA ROCHE
公开号:WO2018011163A1
公开(公告)日:2018-01-18
The present invention relates to compounds of the formula (I), or pharmaceutically acceptable salts, enantiomer or diastereomer thereof, wherein R1 to R4 and Q are as described above. The compounds may be useful for the treatment or prophylaxis of hepatitis B virus infection.
β-Sultams exhibit discrete binding preferences for diverse bacterial enzymes with nucleophilic residues
作者:Roman Kolb、Nina C. Bach、Stephan A. Sieber
DOI:10.1039/c3cc46002a
日期:——
β-Sultams are potent electrophiles that modify nucleophilic residues in selected enzyme active sites. We here identify and characterize some of the specific bacterial targets and show a unique inhibition of the azoreductase family.
Disruption of Oligomerization and Dehydroalanine Formation as Mechanisms for ClpP Protease Inhibition
作者:Malte Gersch、Roman Kolb、Ferdinand Alte、Michael Groll、Stephan A. Sieber
DOI:10.1021/ja4082793
日期:2014.1.29
Over 100 protease inhibitors are currently used in the clinics, and most of them use blockage of the active site for their mode of inhibition. Among the protease drug targets are several enzymes for which the correct multimeric assembly is crucial to their activity, such as the proteasome and the HIV protease. Here, we present a novel mechanism of proteaseinhibition that relies on active-site-directed
Structure–reactivity relationships in the inactivation of elastase by β-sultams
作者:Paul S. Hinchliffe、J. Matthew Wood、Andrew M. Davis、Rupert P. Austin、R. Paul Beckett、Michael I. Page
DOI:10.1039/b208079f
日期:——
N-Acyl-β-sultams are time dependent irreversible active site directed inhibitors of elastase. The rate of inactivation is first order with respect to β-sultam concentration and the second order rate constants show a similar dependence on pH to that for the hydrolysis of a peptide substrate. Inactivation is due to the formation of a stable l â¶ l enzyme inhibitor complex as a result of the active site serine being sulfonylated by the β-sultam. Ring opening of the β-sultam occurs by SâN fission in contrast to the CâN fission observed in the acylation of elastase by N-acylsulfonamides. Structureâactivity effects are compared between sulfonylation of the enzyme and alkaline hydrolysis. Variation in 4-alkyl and N-substituted β-sultams causes differences in the rates of inactivation by 4 orders of magnitude.
The disclosure relates to compounds of formula (I)
and pharmaceutically acceptable salts, and compositions thereof, wherein the substituents are as defined herein. Also provided are methods of making compounds of formula (I), and methods involving the compounds or compositions for treating disorders and diseases described herein.