Tetranortriterpenoids. Part XVI. Partial syntheses of andirobin, methyl angolensate, mexicanolide, and 1-deoxymexicanolide
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 2407-2413
- https://doi.org/10.1039/p19730002407
Abstract
Methyl angolensate (16; R = O) has been synthesised from 7-oxo-7-deacetoxykhivorin (2), thus confirming the proposed 1α-configuration of the ether oxygen atom. The diene lactone (11a) has also been prepared from the same starting material and it readily cyclises by Michael addition to give mexicanolide (18). 1-Deoxymexicanolide (25) has similarly been synthesised from 7-oxo-7-deacetoxygedunin (20). Partial syntheses of andirobin (17) and isoandirobin (19) are also reported.Keywords
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