New sources of steroid sapogenins—XIX: 20S-hydroxyvespertilin, a new steroid lactone from Solanum vespertilio
New sources of steroid sapogenins—XIX: 20S-hydroxyvespertilin, a new steroid lactone from Solanum vespertilio
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.
4 pages, 1 table, 2 schemes.-- Part XVIII: A. G. González, R. Freire, R. Hernández, J. A. Salazar and E. Suárez, Rev. Latinoam. Quím. 4: 45-51 (1973), available at: http://digital.csic.es/handle/10261/16747
One of us (C.G.F.) thanks the Ministerio de Educación y Ciencia for a fellowship "Formación de Personal Investigador". This work was realized within the Programme 1971 conceded by the Foundation Juan March.
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