A process for preparing a chiral tetracyclic compound of formula: ##STR1## wherein R is hydrogen or a C.sub.1 -C.sub.6 -alkyl group and Z is oxygen, sulfur or --CH.dbd.CH--, the compounds having uses as dopamine agonists. The process involves reacting a chiral starting material and subsequent chiral intermediates in a series of chirality-preserving synthetic reactions.
一种制备手性四环化合物的方法,其
化学式为:##STR1##其中R是氢或C.sub.1-C.sub.6-烷基基团,Z是氧、
硫或--CH.dbd.CH--,这些化合物可用作
多巴胺激动剂。该方法涉及在一系列保持手性的合成反应中,通过反应手性起始物和随后的手性中间体来实现。