The cemetery is located in the south-west of Pottenbrunn, on plot "Steinfeld" (15°41´05"/48°13´55"). Discovered in 1930, it had already yielded objects dating to the early La Tène period. In 1981, road construction revealed further finds which initiated rescue excavations by the Bundesdenkmalamt (State Office for Protection of Historical Monuments) under the guidance of J.-W. Neugebauer (Ramsl 2002a(Ramsl , 13) in 1981(Ramsl and 1982. A total of 42 graves with 45 burials (single and double inhumations, and cremations) have been documented. Some burials were severely disturbed (by ancient activities such as grave robbing and/or contemporary construction work), and some were set within fenced enclosures ("Grabgärten"). Three (of 22) samples of charcoal and bone fragments taken by Peter Stadler (Department of Prehistory, Natural History Museum Vienna) in the course of the FWFproject "Absolute Chronology for Early Civilisations in Austria and Central Europe" returned AMS dates of 410-200 cal BCE (grave 520), 550-200 cal BCE (grave 565) and 380-350 cal BCE (grave 1005) (Ramsl 2002b, 359). The cremation burials were not included in the initial osteological analysis, but 31 inhumed individuals were studied (Gerold 2002). Petrous bones from three of these were successfully analyzed for aDNA. Sample I11699 (female) derived from an individual (inv. no. 26.238) aged c. 20 years in grave 89 which, despite disturbance in antiquity, was accompanied by fibulae and ceramic vessels. Sample I11701 (male) derived from an individual (inv. no. 26.249) aged c. 18 years in grave 570, which also included shears, fibulae, and ceramic vessels. Evidence for bone porosity in the mandible and maxilla suggest possible Vitamin C deficiency, while enamel hypoplasia points to malnutrition or illness during childhood. Sample I11708 (female) derived from an individual (inv.no. 26.250) aged c. 25-35 years in grave 574/2, who was richly adorned with fibulae, bronze, iron and silver-rings, an amber ring, a bracelet, a glass bead, and a worked bone artefact.
Lycibarbarines A−C are spirocyclic alkaloids with a unique tetracyclic framework, consisting of tetrahydroquinoline and spiro-fused oxazine−sugar spiroketal subunits. The first total syntheses of lycibarbarines A−C were achieved over 10 steps (longest linear sequence) each. Through this work, it was discovered that the spiroketal unit of lycibarbarines A−C exhibits unusually high resistance to acid-mediated isomerization and epimerization, likely due to the basic nitrogen atom. As such, the lycibarbarines present an interesting case study in preventing the interconversion of spiroketal isomers, which may prove to be instructive in efforts to obtain nonthermodynamic spiroketal frameworks.
Lycibarbarines A–C are spirocyclic alkaloids with a unique tetracyclic framework, consisting of tetrahydroquinoline and spiro-fused oxazine-sugar spiroketal subunits. The first total syntheses of lycibarbarines A–C are reported, achieved over 10 steps (longest linear sequence) each. Through this work, it was discovered that the spiroketal unit of lycibarbarines A–C exhibits unusually high resistance to acid-mediated isomerisation and epimerisation, likely due to the basic nitrogen atom. As such, the lycibarbarines present an interesting case study of preventing the interconversion of spiroketal isomers, which may prove instructive in efforts to obtain non-thermodynamic spiroketal frameworks.
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