Total Synthesis of the Marine Natural Pr
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Xiaochuan Chen; Jieping Zhu
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Article
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2007
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John Wiley and Sons
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English
⚖ 153 KB
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Scheme 5. Domino cyclization to construct the pentacyclic core of cribrostatin 4 (1): a) n-C 6 H 13 SH, TFA/TFE 1:100, 93 %; b) Swern oxidation; c) TBAF, AcOH, THF; d) MeSO 3 H (0.01 % by volume, c = 0.01 m), CH 2 Cl 2 , 51 % (for 3 steps). TFA = trifluoroacetic acid, TFE = trifluoroethanol.