Monatshefte fur Chemie p. 53 - 58 (1982)
Update date:2022-08-04
Topics: Synthesis Heterocyclic
Elmoghayer, Mohamed Rifaat Hamza
Khalifa, Mohamed Ali Elsayed
Ibraheim, Mohamed Kamal Ahmed
Elnagdi, Mohamed Hilmy
The reaction of ethyl cyanoacetate with α-cyanochalcone (1) leads to the formation of β-enaminoesters (3) via Michael addition.Compound 3 reacts with phenylmagnesium bromide to give the β-enaminoketone 5.Acetylation of 3 gives the acetyl product 4.Each of compounds 1 and 3 reacts with malononitrile to give β-enaminonitrile 6.Phenylhydrazine reacts with 3 to give the hydrazone 7.Similarly 3-phenyl-5-aminopyrazole reacts with 3 to give the Schiff base 8. - Keywords: Enaminopyrans; Michael addition; Pyrans, cleavage of
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