Related Experiment Video
Updated: May 21, 2026

Cellular Lipid Extraction for Targeted Stable Isotope Dilution Liquid Chromatography-Mass Spectrometry Analysis
Published on: November 17, 2011
12α-Hy-droxy-3,27-dioxooleanano-28,13-lactone
Jun-Yi Hu1, Gang-Gang Wu, Ying-Qian Xu
1Center of Separation Technology, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
Abstract:
There are two independent mol-ecules in the asymmetric unit of the title compound, C(30)H(44)O(5). They comprise a triterpenoid skeleton of five six-membered rings and a five-membered lactone ring. The five six-membered rings are all trans-fused. In both independent mol-ecules the D rings adopt a slightly distorted half-chair conformation due the presence of the lactone ring while the other four six-membered rings all adopt chair conformations. The characteristic carbon-carbon double bond of the oleanoic skeleton is absent. Inter-molecular O-H⋯O hydrogen bonds between the hy-droxy and carbonyl groups occur in the crystal structure.
More Related Videos
Related Concept Videos
Preparation of Diols and Pinacol Rearrangement
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
Aldehydes and Ketones with Water: Hydrate Formation
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
Hydrolysis of Chlorobenzene to Phenol: Dow Process

