Rauter, A. P.Figueiredo, J.A.Ismael, M.I.Justino, Jorge2023-09-182023-09-182004Rauter, A.P.; Figueiredo, J.A.; Ismael, M.I. & Justino, J. (2004). Synthesis of new pseudo‐C‐nucleosides containing pyrazole rings in their structure. Journal of Carbohydrate Chemistry, 23(8-9), 513-528. DOI:10.1081/CAR-2000445740732-8303http://hdl.handle.net/10400.15/4547Synthetic approaches to new 4-(furanos-4-C-yl)-1H-pyrazole and 3-(furanos-4-C-yl)-1H-pyrazole derivatives are described, including its pyrazole-5-carboxylate derivative, which is a pyrazofurin analogue. Preparation of related 5-acetoxy-1-acetyl-1H-pyrazole, 5-acetoxy-1H-pyrazole-1-carboxylate, and 4,5-dihydro-1-phenyl-1H-pyrazol-5-one derivatives is also reported. The formation of the pyrazole rings was accomplished either by reaction of enones and of 1,3-diketones with N-nucleophiles or by ring closure of a diazoketone.engpyrazolespseudo-C-nucleosides1,3-diketoneshydrazonesjournal article10.1081/CAR-200044574