Synthesis of crown ethers containing the 3,5-di(alkoxycarbonyl)pyridine ring system by means of the Hantzsch condensation
作者:T. J. van Bergen、Richard M. Kellogg
DOI:10.1039/c39760000964
日期:——
The products obtained from reaction of ethyl acetoacetate with several (poly)ethyleneglycols undergo the Hantzsch condensation with ammonium carbonate and formaldehyde giving new crownethers; transformations and properties of these new compounds are described.