Synthesis of oxypropanolamine derivatives of 3,4-dihydro-2H-1,4-benzoxazine, β-adrenergic affinity, inotropic, chronotropic and coronary vasodilating activities
作者:Kriton Iakovou、Michalis Kazanis、Andreas Vavayannis、Giancarlo Bruni、Maria Raffaella Romeo、Paola Massarelli、Shuji Teramoto、Hiroyuki Fujiki、Toyoki Mori
DOI:10.1016/s0223-5234(99)00109-9
日期:1999.11
receptor. With a few exceptions, negative inotropic and chronotropic actions of these compounds were dependent on the size of the 4-substituent obeying the order: unsubstituted < acetyl < propanoyl < butanoyl, while the benzoyl substituent conferred even stronger negative actions in the 6-oxypropanolamine derivatives. Neither negative inotropic and chronotropic actions related with affinity to beta(1)-adrenoceptor
合成了一系列3,4-二氢-2H-1,4-苯并恶嗪的羟丙醇胺衍生物,并评估了犬心脏中的正性变力,变时性和冠状血管舒张活性,对火鸡红细胞中β(1)-肾上腺素能受体的亲和力以及对大鼠肺中的β(2)-肾上腺素能受体。在这些化合物中,4-乙酰基-6-(3-叔丁基氨基-2-羟基)丙氧基-3,4-二氢-2H-1,4-苯并恶嗪对β(1)受体的亲和力高2.1倍比普萘洛尔和7-(3-叔丁基氨基-2-羟基)丙氧基-N-丁酰基-3,4-二氢-2H-1,4-苯并恶嗪对β(2)受体的亲和力高2.5倍,并且此外,对β(2)受体的选择性比普萘洛尔高4386倍。另外,4-乙酰基-6- [3-(3,4-二甲氧基苄基)氨基-2-羟基]丙氧基-3,4-二氢-2H-1,4-苯并恶嗪显示1。对β(1)受体的亲和力比普萘洛尔高1倍,对β(1)受体的选择性也高1147倍。除少数例外,这些化合物的负性变力和变时性作用取决于4位取代基的大小