Studies on the Structure of (+)-Rubremetinium Cation. A New Synthesis of C-Bisnor-rubremetinium Cation and its Model Compound

Abstract

With an aim of determining the structure of rubremethinium cation, C-bisnorrubremetinium salts and their relative compounds were synthesized without any oxidation step, which indicated that the formula (II) is correct for rubremethinium cation in terms of absolute configuration. This assignment was supported by nuclear magnetic resonance data of this salt.