8-Substituted flavonoids and 3′-substituted 7-oxygenated chalcones from Tephrosia purpurea
作者:Andrew Pelter、Robert S. Ward、E. Venkata Rao、N. Ranga Raju
DOI:10.1039/p19810002491
日期:——
isolation and characterisation of ten unusual and closely related flavonoids from the roots of T. purpurea are reported. Three of these compounds are new natural products and they all contain an isopentenyl derived unit attached to C-8 (in the flavones) or the corresponding C-3′(in the chalcones), suggesting that they are derived from a common biosynthetic precursor. The 1H and 13C n.m.r. spectra of
据报道,从紫杉的根中分离和表征了十种不常见且密切相关的类黄酮。这些化合物中的三种是新的天然产物,并且都包含与C-8(在黄酮中)或相应的C-3'(在查耳酮中)相连的异戊烯基衍生单元,表明它们衍生自常见的生物合成前体。报道了用于结构阐明的1 H和13 C nmr光谱。