描述了4-(1,2-二氢-2-氧代-1-吡啶基)-2H-1-苯并吡喃-3-醇的合成和降压活性。未取代的吡啶酮加合物铅化合物7e具有高活性,吡啶酮环上的取代基导致活性降低。为了获得最佳活性,必须在C-6位上强烈吸电子的取代基。当2-吡啶酮环被其他杂环如4-吡啶酮,嘧啶酮,哒嗪酮,吡嗪酮和1,4-丁烷磺胺取代时,活性得以维持。3-羟基官能团(---- 17a)的去除不会显着降低活性。从苯并二氢吡喃醇中除去水会导致苯并二氢吡喃酮的形成,这是已知最有效的降压药之一。各种取代基,尤其是杂环C-6取代基的影响,以4-(2-氧代-1-吡咯烷基)色满-3-醇系列进行了研究。铬醇在3-羟基处被短链酸酯化,保持其活性。色烯双键的环氧化也产生活性化合物。环氧化物22的重排产生3-酮化合物23和烯醇衍生物25。酮23a的还原产生顺式-苯并二氢吡喃醇7ab及其反式异构体7e。在自发性高血压大鼠中以1 mg / kg
Novel compounds having the formula ##STR1## wherein ##STR2## are disclosed. These compounds have potassium channel activating activity and are useful, for example, as cardiovascular agents, especially as antiischemic agents.
Compounds of the formula
wherein:
R₁ is cyano or nitro;
R₂ and R₃ are independently hydrogen or lower alkyl; and
R₄ is alkyl; alkenyl; optionally substituted phenyl or phenyl lower alkyl; -(CH₂)mOR₂ or -(CH₂)mN(R₂)₂; wherein m is an integer of 1-5 and R₂ is as defined above;
or a pharmaceutically acceptable ester or acid addition salt thereof;
are smooth muscle relaxants, particularly useful in the treatment of hypertension.
A novel benzopyran derivative represented by general formula (I) and a pharmaceutically acceptable salt thereof, wherein each symbol is as defined in the specification. This compound is useful for treating hypertension, because it has a persistent hypotensive activity and a peripheral blood relaxing activity by activating a potassium channel, and also for treating cardiovascular diseases such as angina pectoris and heart failure, because it has a selective coronary blood stream increasing activity.
作者:Karnail S. Atwal、Gary J. Grover、Syed Z. Ahmed、Francis N. Ferrara、Timothy W. Harper、Kyoung S. Kim、Paul G. Sleph、Steven Dzwonczyk、Anita D. Russell
DOI:10.1021/jm00076a027
日期:1993.11
Synthesis of Novel <i>trans</i>-4-(Substituted-benzamido)-3,4-dihydro-2<i>H</i>-benzo[<i>b</i>]pyran-3-ol Derivatives as Potential Anticonvulsant Agents with a Distinctive Binding Profile
作者:Wai N. Chan、John M. Evans、Michael S. Hadley、Hugh J. Herdon、Jeffrey C. Jerman、Helen K. A. Morgan、Tania O. Stean、Mervyn Thompson、Neil Upton、Antonio K. Vong