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Updated: Aug 15, 2026

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
Published on: February 7, 2019
[Synthesis and pharmacologic properties of pranolium and its optical isomers]
H Foken1, S Gerbsch, H P Schmauder
1VEB Isis-Chemie, Zwickau.
Abstract:
Propranolol is a well-known powerful betareceptor-blocking agent. Its quaternary dimethyl derivative, designated as pranolium was firstly prepared by Lucchesi. Compared to propranolol it possesses no betareceptor-blocking activity and no local anaesthetic properties but shows the same antiarrhythmic action as the starting material. The synthesis of pranolium and its optical isomers starting from the corresponding propranolol derivatives is described. Their pharmacological activities have been tested. No significant differences regarding the pharmacological action could be observed.
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