Flavonóides isolados de Piptadenia stipulacea (Benth.) Ducke (Fabaceae)

Abstract

Piptadenia stipulaceae belonging to the Fabaceae family, one of the largest in dicots and the third largest family of flowering plants. This species is commonly known in the Brazilian Northeast as mimosa white, carcara, calumbi and is widely distributed in the caatinga, and is used in folk medicine in inflammation. This paper describes the isolation and structural identification of some chemical constituents of aerial parts of Piptadenia stipulacea (Benth.) Ducke, in order to increase knowledge about the chemical Piptadenia genus, and provide samples for testing to confirm the pharmacological popular use of the species. The chemical constituents were identified through analysis of data obtained by spectroscopic methods such as Infrared Spectroscopy and 1H and 13C Nuclear Magnetic Resonance uni-dimensional, and compared with literature values. Phytochemical study of the chloroform extract of P. stipulacea resulted in the isolation of five flavonoids: 5-7-dihydroxy-3,4 ,6- trimethoxyflavone; 4 ,5,7-trihydroxy-3,3 ,6-trimethoxyflavone; 4 ,5,7- trihydroxy-3 ,6- dimethoxyflavone, first reported in the genus, 3,3 ,5,7-tetrahydroxy-4 ,6- dimethoxyflavone and 4',5,7-trihydroxy-3,6-dimethoxyflavone, first described in the family.