Patent ID: 7196196

Claim:
A process for the preparation of imidazo-[1,2a]-5,6,7,8-tetra-hydropyridin-8-ones, of the formula which comprises a) reacting a γ-butyrolactone of the formula III with an imidazole of the formula IIa or IIb wherein at least one of R 1 or R 2 is different from hydrogen, and b) isolating the imidazo[1,2a]-5,6,7,8-tetrahydropyridin-8-one, where R1, R2 or every R3 is simply independently selected from the group consisting of hydrogen, unsubstituted, branched or unbranched or cyclic alkyl, substituted or unsubstituted aryl, where the number of substituents R3 can assume a value n from 1 to 3.