The present invention provides a nitrogen-containing saturated heterocyclic compound of the formula [I] which is useful as a renin inhibitor.
wherein R
1
is a cycloalkyl group or an alkyl,
R
22
is an optionally substituted aryl and the like,
R is a lower alkyl group,
R
3
, R
4
, R
5
and R
6
are the same or different, and are a hydrogen atom, an optionally substituted carbamoyl, an optionally substituted alkyl, or alkoxycarbonyl,
or a pharmaceutically acceptable salt thereof.
Isoxazoles. 9. Degradation Kinetics of 4-(lsoxazolylamino)-1,2-naphthoquinone in Acidic Aqueous Solution
作者:Cristina S. Ortiz、Maria M. de Bertorello
DOI:10.1002/jps.2600831018
日期:1994.10
The degradationkinetics of N-(5-methyl-4-isoxazolyl)-4-amino-1,2-naphthoquinone (1) was studied in aqueoussolution over a pH range of 0.65-7.50, at 35 degrees C and at a constant ionic strength of 0.5. The degradation rates were determined by high-pressure liquid chromatography and were observed to follow pseudo-first-order kinetics with respect to the concentration of 1. The pH-rate profile was
研究了N-(5-甲基-4-异恶唑基)-4-氨基-1,2-萘醌(1)在pH范围为0.65-7.50的水溶液中,在35摄氏度和恒定温度下的降解动力学。离子强度为0.5。通过高压液相色谱法测定降解速率,并观察到其相对于1的浓度遵循拟一级动力学。在酸性pH下,pH速率分布与斜率-1呈线性关系,pH值独立于3.50。至7.50。理论pH速率曲线与实验数据之间的良好一致性支持了拟议的降解过程。氢离子和水的催化速率常数分别为kH = 0.901 M-1 h-1和k0 = 1.34 x 10(-3)h-1。这些数据适合开发1的稳定剂型。准确度,峰锐度,
Isoxazoles. 10. 10. Degradation and Enolization Kinetics of 4-Aminoisoxazolyl-l,2-naphthoquinone in Basic Aqueous Solution
作者:Cristina S. Ortiz、María M. de Bertorello
DOI:10.1002/jps.2600840623
日期:1995.6
The kinetics of enolization and degradation of N-(5-methyl-4-isoxazolyl)-4-amino-1,2-naphthoquinone (1) was investigated in aqueoussolutions over a pH range of 7.30 to 12.25, at 35 degrees C and at constant ionic strength (mu = 0.5) using reversed-phase HPLC. Pseudo-first-order kinetics was observed throughout the pH range studied. The rate of enolization (ke), the keto-enol equilibrium constant (Kt)
A compound of the formula
wherein
R1 is C1-3 alkyl optionally substituted with one or more fluorines;
R2 is C1-6 alkyl, cycloalkyl or NR4R5;
R3 is a pyrazole, imidazole or isoxazole group of partial formula (A), (B) or (C)
NR4R5 is a nitrogen-containing heterocyclic ring;
R6 is C1-3 alkyl; and
R7 and R8, which are the same or different, each represents C1-3 alkyl, halogen, CF3 or CN;
or a pharmaceutically-acceptable salt thereof.