Teixeira, FatimaAntunes, Inês F.Curto, Maria João MarceloNeves, M.Teixeira, António P. S.2010-06-232010-06-232009Teixeira, Fátima C.; Antunes, Inês F.; Curto, Maria J. Marcelo; Neves, M; Teixeira, António P. S. Novel 1-hydroxy-1,1-bisphosphonates derived from indazole: synthesis and characterization. In: Arkivoc,vol XI, 2009, p.69-84http://hdl.handle.net/10400.9/703Bisphosphonates (BPs) are an important class of drugs used in the treatment of abnormal calcium metabolism diseases. The first syntheses of bisphosphonates derived from indazole, substituted at the N-1, N-2 and C-3 positions are reported. The 1-hydroxy-1,1-bisphosphonates were synthesized from the corresponding carboxylic acid or acyl chloride compounds, by two different methods. These BPs have a side chain with different lengths ((CH2)n, n = 0-5) between the indazole ring and the bisphosphonate group.engBisphosphonatesIndazoleN-1 and N-2 isomersSpectroscopic characterizationjournal article