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Structural characterization of saturated pyrrolizidine alkaloids from Heliotropium transalpinum var. transalpinum Vell by NMR spectroscopy and theoretical calculations

2009; Elsevier BV; Volume: 50; Issue: 22 Linguagem: Inglês

10.1016/j.tetlet.2009.03.074

1873-3581

Janaina C.M. Medina, Gisele F. Gauze, Gentil J. Vidotti, María Helena Sarragiotto, Ernani A. Basso, Juliana Luna Bilheiro Peixoto,

Polymer Synthesis and Characterization

The chemical investigation of Heliotropium transalpinum var. transalpinum Vell. (Boraginaceae) led to the isolation of transalpinecine (1), a novel pyrrolizidine alkaloid, in addition to known alkaloids subulacine (1β-2β-epoxy-1α-hydroxymethyl-8α-pyrrolizidine) (2), and 1α-2α-epoxy-1β-hydroxymethyl-8α-pyrrolizidine (3). The structures of the isolated compounds were elucidated based on spectroscopic data and theoretical calculations.