Pyrindinchemie, 3. Mitt.: Über die Synthese des 3-Hydroxy-1-methyl-4-oxo-1,4-dihydro-pyrrolo2′,3′:3,4cyclopenta1,2-cpyridin-2-carbonsäureäthylesters. Ein Vertreter eines neuen heterocyclischen Ringsystems

摘要

1is synthesized by reaction of cinchomeronic anhydride with ethyl acetoacetate and triethylamine in acetic anhydride. Its structure is discussed by means of IR- and1H-NMR-spectrum. By reaction of1with SOCl23is formed, which is converted with ethyl sarcosinate to4. The structure of4is confirmed by chemical proof.Dieckmanncyclisation of4gives the title compound7.