18829-59-9Relevant articles and documents
Cedar camphor derivative as well as preparation method and application thereof
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Paragraph 0211-0214; 0227-0230, (2021/04/03)
The invention relates to the technical field of synthetic drugs, in particular to a cedar camphor derivative as well as a preparation method and an application thereof. The cedar camphor derivative isany one of compounds shown in the following structural formula, tautomers, hydrates, solvates or pharmaceutically acceptable salts thereof, and the cedar camphor derivative has a good treatment effect on viruses, especially influenza viruses, so that the application range of the cedar camphor and the derivatives thereof is expanded, and the variety of the cedar camphor derivatives is expanded.
An oxidative dearomatization-induced [5 + 2] cascade enabling the syntheses of α-cedrene, α-pipitzol, and sec -cedrenol
Green, Jason C.,Pettus, Thomas R. R.
, p. 1603 - 1608 (2011/04/16)
Efficient syntheses of α-cedrene (1), α-pipitzol (2), and sec-cedrenol (3) were carried out using a new method, which was inspired by the proposed biosynthesis of the tricyclic skeleton of cedrol (12). The key transformation begins with the oxidative dearomatization of curcuphenol (5a) followed by an intramolecular [5 + 2] cycloaddition of the respective phenoxonium intermediate across the tethered olefin. The benzylic stereocenter effectively guides the formation of the first two stereocenters during the [5 + 2] reaction. The cascade then terminates with the selective incorporation of acetic acid to generate a third stereocenter, setting it apart from other previous cationic [5 + 2] reactions. The phenolic precursors (5a-h) are constructed from readily available salicylaldehydes, either as the racemate (one pot) or as a specific enantiomer (four pots) by a modification to our method for the generation of ortho-quinone methides (o-QMs).