Artículos de revistas
Mechanistic studies of the photochemical rearrangement of 1-oxolongipin-2-ene derivatives
Fecha
2002-03Registro en:
Meléndez Rodríguez, Myriam; Cerda García Rojas, C. M.; Catalan, Cesar Atilio Nazareno; Joseph Nathan, P.; Mechanistic studies of the photochemical rearrangement of 1-oxolongipin-2-ene derivatives; Pergamon-Elsevier Science Ltd; Tetrahedron; 58; 12; 3-2002; 2331-2338
0040-4020
CONICET Digital
CONICET
Autor
Meléndez Rodríguez, Myriam
Cerda García Rojas, C. M.
Catalan, Cesar Atilio Nazareno
Joseph Nathan, P.
Resumen
Ultraviolet irradiation of (4R,5S,7S,8R,9S,10R,11R)-7,8,9-triacetyloxy-1-oxolongipin-2-ene (2) afforded the vulgarone A 7 and the pingilonene 8 derivatives as the major products, which were formed by a [1,3]-shift, together with the minor secondary photoproducts 9 and 10. The phototransformation mechanism is discussed in terms of individual ultraviolet irradiation of 7 and 8 in combination with the monitoring reaction progress of 2 by 1H NMR measurements. The stereostructures of the new carbocyclic skeleta were geometry optimized using density functional calculations.