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silicagel-hclo4
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Synthesis of Flavylium Perchlorate Salts via Reaction of Salicylaldehydes and Acetophenones Using Silica Gel.HClO4 Reagent.
,
M.Sc. Thesis
Sharif University of Technology
;
Matloubi Moghaddam, Firouz
(Supervisor)
Abstract
2-flavylium skeletons (2- Phenylbenzopyrylium salts), are often found as the basic structure in anthocyanins; the chromophores in natural pigments which are responsible for intense colors of fruits, leaves and flowers. They are present in plant organs, also to prevent them from environment predation and to protect the plant against ultraviolet irradiation especially in leaves. Aside from their contribution in plant parts, in industry, anthocyanines serve as food colorant, laser dyes and hair growing agents and have considerable biological and pharmaceutical activities like antioxidant, anti cancer, anti inflammatory, anti atherosclerosis, cardio protection and anti aging properties. almost...