Orthoamides and Iminium Salts LXXXII:^{[ 1 ]} Cleavage of Orthoamides of Alkynecarboxylic Acids by Elemental Iodine – A New Method for the Preparation of Vinylogous Guanidinium Salts

Dedicated to Prof. Dr. Jean Sommer on the occasion of his 75^th birthday

Abstract

Orthoamides of six alkynecarboxylic acids, possessing reactive substituents in 3-position, are transformed by elemental iodine to the corresponding vinylogous guanidinium iodides. The constitution of two of the iodides was established by crystal-structure­ analysis.

Key words

orthoamides - alkynecarboxylic acids - cleavage reactions - iodine - vinylogous guanidinium iodides

• References

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