Synthese von 3-Hydroxy-1-oxo-4-alkyl-1H-benzodpyrido2,1—bthiazolen

摘要

Ring closure of γ-benzothiazolyl-(2)-acetoacetates affords benzopyridothiazoles. In the reaction of these substituted acetoacetic acid esters with alkyl halides in the presence of bases, the formation of benzopyridothiazoles is observed; these heterocyclic compounds are alkyl-substituted at C-4. IR- and1H-NMR-spectral data of the benzopyridothiazoles and some of their derivatives are given