Minor and trace sterols from marine invertebrates. 50. Stereostructure and synthesis of nicasterol, a novel cyclopropane-containing sponge sterol
JR Proudfoot, X Li, C Djerassi
Index: Proudfoot, John R.; Li, Xian; Djerassi, Carl Journal of Organic Chemistry, 1985 , vol. 50, # 12 p. 2026 - 2030
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Citation Number: 32
Abstract
The occurrence of a cyclopropane ring in the side chain constitutes a structural feature unique to marine sterols. The structural types encountered so far range from simple3 (1) and more substituted4t6 (eg, 2 and 3) 22, 23-methylenecholesterols to examples in which the cyclopropane ring arises by bond formation between C24 and C266 (4), C23 and C2874b, c (5) and finally C26 and C27s (6). We now describe still another cyclopropane type-arising ...
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