TY - JOUR
T1 - The absolute configuration of angular 3′-acyloxypyranocoumarins by vibrational circular dichroism exciton chirality
AU - Buendía-Trujillo, Abigail I.
AU - Torrres-Valencia, J. Martín
AU - Joseph-Nathan, Pedro
AU - Burgueño-Tapia, Eleuterio
N1 - Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2014/10/31
Y1 - 2014/10/31
N2 - A complex mixture of lomatin C-3′ esters and (-)-O-angeloyllomatin 1 was isolated from the seeds of Prionosciadium thapsoides. Since a literature search revealed that some lomatin C-3′ monoesters have positive specific rotations, while others had negative values, the absolute configuration of all of the molecules was determined to be (R) by exciton chirality in the infrared region, and by chemical correlation. A single crystal X-ray study of acetyllomatin 3, using the Flack and Hooft parameters, independently confirmed this absolute configuration.
AB - A complex mixture of lomatin C-3′ esters and (-)-O-angeloyllomatin 1 was isolated from the seeds of Prionosciadium thapsoides. Since a literature search revealed that some lomatin C-3′ monoesters have positive specific rotations, while others had negative values, the absolute configuration of all of the molecules was determined to be (R) by exciton chirality in the infrared region, and by chemical correlation. A single crystal X-ray study of acetyllomatin 3, using the Flack and Hooft parameters, independently confirmed this absolute configuration.
UR - http://www.scopus.com/inward/record.url?scp=84908377730&partnerID=8YFLogxK
U2 - 10.1016/j.tetasy.2014.09.001
DO - 10.1016/j.tetasy.2014.09.001
M3 - Artículo
SN - 0957-4166
VL - 25
SP - 1418
EP - 1423
JO - Tetrahedron Asymmetry
JF - Tetrahedron Asymmetry
IS - 20-21
ER -