Efficient synthesis of N1- or N3- substituted thieno[2,3-d]imidazol- 2-ones

Article abstract of DOI:10.1016/S0040-4020(99)00285-9

N¹- or N³-substituted thieno[2,3-d]imidazol-2-one derivatives are selectively obtained after N-alkylation of thiaisatoic anhydrides followed by formation of the N-substituted aminocarbonyl azides and Curtius rearrangement.