6-Keto-hydroxymorphinans having at the 4 position a substituent which is R.sub.1 =H, O lower alkyl, or O lower acyl, and N may be substituted by R.sub.2, which for agonist properties may be lower alkyl, lower alkenyl, cyclopropylmethyl, or phenyl lower alkyl, etc. Additionally, the nitrogen may be substituted by R.sub.2, which is allyl, cyclopropylmethyl, cyclobutylmethyl, dimethylallyl, etc., which function as antagonists to the morphine-like activity of the compound. Such activity is known as antinociceptive.
在4位上具有R.sub.1 = H、O较低烷基或O较低酰基取代基的6-酮基-羟基
吗啡烷衍
生物,N可以被R.sub.2取代,对于激动剂作用,R.sub.2可以是较低烷基、较低烯基、
环丙基甲基或苯基较低烷基等。此外,氮原子可以被R.sub.2取代,R.sub.2可以是
丙烯基、
环丙基甲基、
环丁基甲基、二甲基烯丙基等,作为化合物类似
吗啡的活性的拮抗剂。这种活性被称为抗痛性。