Abstract
Azidolysis of C-19 diastereoisomer tosylesters of morphine derivatives possessing a bridged ring C has been studied and 4-azatetracyclo[4.4.02,4.03,8]decanes 6b, 6d and 6f were formed via the substitution and subsequent intramolecular cyclization of the (R)-C-19 tosylesters 4b, 4d and 4f, and primarily the ethylidene derivatives 7a, 7b and 7c were obtained from (S)-C-19 tosylesters 4c, 4e and 4g. According to our experience the course of the reaction depends on the configuration of the C-19 centre of chirality and on the spatial requirement of the substitutent on C-6
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