The invention relates to 5-isothiazolamine derivatives having the formula ##STR1## in which R.sub.1 is hydrogen, methyl, or ethyl, R.sub.2 and R.sub.3 are independently selected from hydrogen and alkyl, and the dotted line represents an optional bond, or a pharmaceutically acceptable acid addition salt thereof. The compounds have .alpha..sub.2 -adrenergic agonistic properties with little cardiovascular side-effects and minimal or no dopaminergic and cholinergic activity.
本发明涉及具有以下式子的5-
异噻唑胺衍
生物:##STR1## 其中R.sub.1为氢、甲基或乙基,R.sub.2和R.sub.3分别选自氢和烷基,点线表示可选键,或其药学上可接受的酸加成盐。该化合物具有α2-
肾上腺素能激动剂特性,且心血管副作用小,最小或无
多巴胺能和
胆碱能活性。