New sources of steroid sapogenins—XIX: 20S-hydroxyvespertilin,a new steroid lactone from Solanum vespertilio |
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| Authors: | AG González R Freire CG Francisco JA Salazar E Suárez |
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| Institution: | Organic Chemistry Department, University of La Laguna, Institute de Investigaciones Químicas, C.S.I.C., Tenerife, Spain |
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| Abstract: | From stems and leaves of Solanum vespertilio Ait. 20S-hydroxyvespertilin (1c), a new steroid lactone, has been isolated and the structure confirmed by synthesis of its dihydro derivative from tigogenin. 1c proved to be identical with a dihydroxy lactone obtained by Gashchenko et al as by-product of the conversion of diosgenin to 16-dehydropregnenolone. The stereochemistry at C20 proposed by these authors is revised. |
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