Methods for allylic oxygenation of (+)-delta-cadinol by SeO2 have been developed to study approaches to the formation of the eleutheside core from it. Diasteromeric alcohols and the product of their 1,4-oxacyclization, which is transformed into a bicyclic derivative containing the required functional groups to study the final cyclization into the eleutheside core, were prepared. The a-hydroxy derivative was converted after benzylation and ozonolysis into a mixed acetal, a convenient compound for performing the synthesis via an alternate route.
作者:F. A. Valeev、I. P. Tsypysheva、A. M. Kunakova、G. A. Tolstikov
DOI:10.1023/a:1014477206618
日期:——
Functionalization of the Allyl Fragment in (+)- -Cadinol
作者:F. A. Valeev、I. P. Tsypysheva、A. M. Kunakova、O. Yu. Krasnoslobodtseva、O. V. Shitikova、L. V. Spirikhin、G. A. Tolstikov
DOI:10.1023/b:rujo.0000034967.56553.3e
日期:2004.3
Epoxidation, bromination, and iodination of the double bond in (+)-delta-cadinol under various conditions are accompanied by formation of 1,4- or 1,5-epoxy derivatives. By contrast, vicinal hydroxylation gives rise to "normal" products. Intramolecular cyclization of the resulting vicinal diols was studied.
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作者:I. P. Tsypysheva、A. M. Kunakova、F. A. Valeev、G. A. Tolstikov
DOI:10.1023/a:1014491931267
日期:——
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作者:G. A. Tolstikov、I. P. Tsypysheva、A. M. Kunakova、F. A. Valeev
DOI:10.1023/a:1013071510133
日期:——
Inhibition of intramolecular reactions of (+)-δ-cadinol
作者:O. Yu. Krasnoslobodtseva、F. A. Valeev、O. V. Shitikova、G. A. Tolstikov
DOI:10.1134/s1070428006090119
日期:2006.9
(+)-delta-Cadinol is smoothly acetylated with isopropenyl acetate to form the corresponding acetate which is difficultly hydrolyzable in the presence of bases; unlike initial (+)-delta-cadinol, the acetylation product gives no 1,4- and 1,5-epoxy derivatives as by-products in the allylic oxidation and epoxidation reactions.