title: Revisiting 23-iodospirostanes. New facts and full characterization.
abstract: In addition to a previous report, the reaction of tigogenin acetate with ICl in refluxing CHCl(3) produced the hitherto unknown 23R-iodotigogenin acetate, bearing an axial iodine atom at C-23 and its already reported 23S-epimer. The same treatment of sarsasapogenin acetate led to a single diasteromer characterized as 23S-iodosarsasapogenin acetate. A full characterization of the obtained compound including (1)H, (13)C NMR, MS and X-ray diffraction is provided.
authors: Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico.
authors: Karen M
authors: KM
authors: Ruíz-Pérez
authors: Margarita
authors: M
authors: Romero-Avila
authors: Blas
authors: B
authors: Flores-Pérez
authors: Marcos
authors: M
authors: Flores-Alamo
authors: Rafael
authors: R
authors: Moreno-Esparza
authors: Martín A
authors: MA
authors: Iglesias-Arteaga
mesh_terms: D018360:Crystallography, X-Ray; D007455:Iodine / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D013150:Spirostans / Q000138:chemical synthesis* / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D013150:Spirostans; D007455:Iodine