| || || Quinone|
| || || Studies on some naturally occurring quinones from Fijian plants |
Author: Ali, Sadaquat.
Institution: University of the South Pacific.
Subject: Quinone , Plant pigments, Botanical chemistry
Call No.: Pac QD 341 .K2 S4
Copyright:This thesis may be copied without the authors written permission.
Abstract: This thesis is divided into two parts, Included in the first part is a discussion on the uses of Cassia plants in folkmedicine, and a review of the anthraquinones and their derivatives known in ia alata (Leguminosae) . The presence of aloe-emodin and rhein in the leaves of C. alata is confirmed, and the isolation and identification of two new constituents, isochrysophanol and the 1¬glucoside of physcion is reported. The second part is primarily concerned with, the chemistry of Hibiscus (Malvaceae) , and reported herein is the isolation and characterization of hibisconea A-C, lapachol and a new ketone, named hibiscone D from the stems of Hibiscus tiliaceous (Fiji) . The isolat and structural elucidation of gossypol, mansonone D and F from the roo of the same plant from Brazil is also reported. The occurrence of terpenoid o-and p-quinones in Malvaceae is discussed, and the synthes of o- and p_~naphthoquinone-peri-alde.hydes, structurally-related to the terpenoids in Malvaceae is described.