213467-11-9Relevant academic research and scientific papers
Rearrangement of 5-Amino-5-X-pentadienals to 2-Aminopyrylium Salts
Fischer, Fabian,Berger, Daniel,Neuenschwander, Markus
, p. 1792 - 1802 (1998)
Various 2-aminopyrylium salts 7 (X = Cl, Br, I) are available in a simple one-pot procedure by reacting 'push-pull' enynes 5 with equivalent amounts of HCl, HBr, or HI. On the other hand, reaction of HF or AcOH with 'push-pull' enynes S is considerably sl
