Novel 3-beta-methoxysteroids from the Senegalese sponge Microscleroderma spirophora

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V Costantino¹, E Fattorusso, A Mangoni

¹Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli, Italy.

|March 1, 1994

Abstract:

The Senegalese sponge Microscleroderma spirophora has been found to produce exclusively very unusual 3 beta-methoxysteroids in place of the common 3 beta-hydroxysteroids. Six different methoxysteroids (three of which are novel compounds) have been isolated and identified by spectroscopic means (MS, IR, 1H and 13C NMR), and their taxonomic significance discussed. A new method for the determination of the configuration at C-24 in saturated 24-ethyl side chains is also proposed.

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