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The amides of nicotinoylamino acids were prepared and alkylated to the quaternary salts 1f-n. The α-amino acid moiety in 1 is S configurated. The salts 1 cyclise under the influence of base to give the cyclopeptide-like substances 4, 5 and 7, with seven-or fourteen (sixteen, eighteen-) membered rings, respectively.

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Untersuchungen an quartären Pyridinium-Salzen, XVII Cyclopeptidartige Verbindungen aus Salzen von Nikotinoylaminosäureamiden/Investigations of Quaternary Pyridinium Salts, XVII  Cyclopeptide-like Substances from Salts of the Amides of Nicotinoylamino Acids