Artículos de revistas
Structure and absolute configuration of a secolignan from Peperomia blanda
Fecha
2011-09-01Registro en:
Phytochemistry Letters. Amsterdam: Elsevier B.V., v. 4, n. 3, p. 245-249, 2011.
1874-3900
10.1016/j.phytol.2011.04.007
WOS:000296534500009
0124211071790021
4484083685251673
1308042794786872
Autor
Universidade Estadual Paulista (Unesp)
Universidade Estadual de Maringá (UEM)
Universidade de São Paulo (USP)
Institución
Resumen
A secolignan, (-)-2-methyl-3-[bis(3 ',4 '-methylenedioxy-5 '-methoxyphenyl) methyl] butyrolactone (1), with a rare cis configuration was isolated from the aerial parts of Peperomia blanda (Piperaceae). The structure of this compound was elucidated by a combination of spectroscopic methods, including ultraviolet, infrared, 1D- and 2D- nuclear magnetic resonance as well as high resolution mass spectrometry data. The absolute configuration of (-)-1 was determined as (2R,3S) by the comparison of experimental electronic circular dichroism (ECD) spectroscopy and time-dependent density functional theory (TDDFT) calculations. (C) 2011 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.