The enantioselective synthesis of attenols A and B, cyclic polyethers of marine origin, was accomplished on a semigram scale by using diastercoselective hydroboration, coupling with lithium acetylide, Lindlar reduction and acid-catalyzed acetal formation. The configuration of the remaining undetermined spiro acetal carbon was unambiguously determined to be 11S using this ample supply of attenol A. The antitumor activities of synthetic attenol A were also examined. (C) 2002 Elsevier Science Ltd. All rights reserved.
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Lanzhou Univ, State Key Lab Appl Organ Chem, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
Lanzhou Univ, Coll Chem & Chem Engn, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, State Key Lab Appl Organ Chem, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
Du, Qiang
Fan, Zhibo
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Lanzhou Univ, Coll Chem & Chem Engn, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, State Key Lab Appl Organ Chem, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
Fan, Zhibo
Yang, Ming
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Lanzhou Univ, Coll Chem & Chem Engn, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R ChinaLanzhou Univ, State Key Lab Appl Organ Chem, 222 South Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China
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Scripps Res Inst, Dept Chem, La Jolla, CA 92037 USA
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Nicolaou, K. C.
Chen, David Y. -K.
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Seoul Natl Univ, Dept Chem, Seoul, South KoreaInst Chem & Engn Sci, Organ Chem Helios, Singapore 138667, Singapore
Chen, David Y. -K.
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
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Sarlah, David
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