Steroid compounds of marine sponges. VII. Preparation of derivatives of sokotrasterol and halistanol sulfates and structure-activity interrelationships among these compounds

Five new sulfated derivatives of sokotrasterol and halistanol have been obtained: 24-nor-5α-cholane-2β,3α,6α,23-tetraol 2β,3α,6α-tri(sodium sulfate); 24-nor-5α-cholane-2β,3α,6α,23-tetraol 2β,3α,6α-tri(sodium sulfate) 23-palmitate; 24ε,25-dimethyl-5α-cholestane-2β,3α,6α-triol 3α-(sodium sulfate); 24ε,25-dimethyl-5α-cholestane-2β,3α,6α-triol 6α-(sodium sulfate); and 24ε,25-dimethyl-5α-cholestane-2β,3α,6α-triol 2β,6α-di(sodium sulfate). The inhibiting and membranolytic properties of the polysulfated steroids from sponges and their derivatives have been studied. It has been shown that physiological activity in this series of compounds depends on biphilicity.