117459-94-6Relevant articles and documents
Acetylenchemie. 9. Mitt. Anellierte Imidazole aus N-Propinylamid-Vorstufen
Reisch, Johannes,Scheer, Mathias
, p. 677 - 679 (2007/10/02)
The compound 2-(N-formyl-N-prop-2'-inyl)aminopyridine was cyclised in boiling formic acid to 3-methylimidazopyridine, with 3-methylene-2H-imidazopyridine as the intermediate.Under similar conditions the 1,3-diprop-2-inylpyrimidoquinoline-2,4-dione resulted from 1-methylimidazoquinoline-4-carbonic acid-N-2-prop-2'-inylamide and from the 1-prop-2'inylbenzonaphthyridin-2-one the 1-methylbenzoimidazonaphthyridine-4,7-dione as a new ring system, was obtained.