Related Experiment Video
Updated: Aug 18, 2026

Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology
Published on: August 23, 2024
Acylperoxylated and seco-mexicanolides from stems of Khaya anthotheca
Izabel C Piloto Ferreira1, Diógenes A Garcia Cortez, M Fátima das G F da Silva
1Departamento de Química, Universidade Federal de São Carlos, Caixa postal 676, 13565-905, São Carlos-SP, Brazil.
Abstract:
The stems of Khaya anthotheca yielded two new limonoids, which were identified on the basis of spectroscopic analysis as 1alpha,8alpha-oxido-3beta-acetoxy-2alpha-acylperoxy-1alpha,14alpha-dihydroxy-[3.3.1(10,2)]-bicyclomeliac-7,19-olide (3) and 3-acetoxy-8,14-dien-8,30-seco-khayalactone (4). Methyl 1alpha,2beta,3alpha,6,8alpha,14beta-hexahydroxy-[4.2.1(10,30).1(1,4)]-tricyclomeliac-7-oate, scopoletin, and 3-O-beta-D-glucopyranosylsitosterol were also isolated. The limonoids were of little value to clarify the basis of the nonresistance against Hypsipyla grandella.
Related Concept Videos
Oxidation of Phenols to Quinones
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
The carbonyl center is activated by...
Alkynes to Carboxylic Acids: Oxidative Cleavage
Radical Autoxidation
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
