Indole alkaloid and other constituents from Ocotea minarum

Abstract

Dos frutos de Ocotea minarum foram isolados um novo alcalóide indólico, triptofol-5-O-b-D-glicopiranosídeo, a cumarina escopoletina e os flavonóides taxifolina, quercetina-7-O-b-D-glicopiranosídeo, eriodictiol-3'-O-b-D-glicopiranosídeo e naringenina-7-O-b-D-glicopiranosídeo. Do cerne foi isolado um novo alquil fenol, 3-(1,4-diidroxipentil)-5-metoxifenol, além de 5-propilresorcinol, trans-asarona, lioniresinol, 3-O-b-D-glicopiranosil estigmasterol e estigmasta-4,22-dien-3-ona. Da casca do caule foram obtidos o sesquiterpeno ácido lanceólico (como seu derivado éster metílico após metilação com diazometano) e b-sitosterol. O ácido lanceólico e 5-propilresorcinol estão sendo relatados pela primeira vez como produtos naturais.

ABSTRACT - From the fruits of Ocotea minarum a new indole alkaloid, tryptophol-5-O-b-D-glucopyranoside, was isolated in addition to the coumarin scopoletin and the flavonoids taxifolin, quercetin-7-O-b-D-glucopyranoside, eriodictyol-3'-O-b-D-glucopyranoside and naringenin-7-O-b-D-glucopyranoside. A new alkyl phenol, 3-(1,4-dihydroxypentyl)-5-methoxyphenol, was obtained from the heartwood in addition to 5-propylresorcinol, trans-asarone, lyonyresinol, 3-O-b-D-glucopyranosyl stigmasterol and stigmasta-4,22-dien-3-one, whereas from the trunk bark the sesquiterpene lanceolic acid (as its methyl ester derivative after methylation procedures) and b-sitosterol were isolated. 5-propylresorcinol and lanceolic acid are reported for the first time as natural products.