title: Synthesis of new N-substituted 3,4,5-trihydroxypiperidin-2-ones from d-ribono-1,4-lactone.
abstract: d-Ribono-1,4-lactone was treated with ethylamine in DMF to afford N-ethyl-d-ribonamide 8a in quantitative yield. Using this reaction procedure, N-butyl, N-hexyl, N-dodecyl, N-benzyl, N-(3-methyl-pyridinyl)-, N-(2-hydroxy-ethyl)-, and N-(2-cyano-ethyl)-d-ribonamides 8b-h were obtained in quantitative yield. Bromination of the amides 8a-e with acetyl bromide in dioxane followed by acetylation gave 2,3,4-tri-O-acetyl-5-bromo-5-deoxy-N-ethyl, N-butyl, N-hexyl, N-dodecyl, and N-benzyl-d-ribonamides 9a-e in 40-54% yields. To obtain 2,3,4-tri-O-acetyl-5-bromo-5-deoxy-N-(3-methyl-pyridinyl)-, N-(2-hydroxy-ethyl)-, and N-(2-cyano-ethyl)-9f-h, the bromination is necessary before the amidation reaction. Treatment of the bromoamides 9a-h with NaH in DMF followed by methanolysis affords N-alkyl-d-ribono-1,5-lactams 12a-h in quantitative yield.
authors.affiliation: Laboratoire des Glucides, UMR 6219, Université de Picardie Jules Verne, 33 Rue Saint-Leu, F-80039 Amiens, France.
authors.forename: Céline
authors.initials: C
authors.lastname: Falentin-Daudre
authors.forename: Daniel
authors.initials: D
authors.lastname: Beaupère
authors.forename: Imane
authors.initials: I
authors.lastname: Stasik-Boutbaiba
mesh_terms: D001372:Aza Compounds / Q000138:chemical synthesis*; D007769:Lactams / Q000138:chemical synthesis; D007783:Lactones / Q000737:chemistry*; D010881:Piperidones / Q000138:chemical synthesis*; D012266:Ribose / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D001372:Aza Compounds; D007769:Lactams; D007783:Lactones; D010881:Piperidones; C474981:D-ribono-1,4-lactone; D012266:Ribose