Volume 25, Issue 9 pp. 1357-1362
Full Paper

Asymmetric Synthesis of the C(17)–C(28) Subunit of Didemnaketal B

Xue-Qiang Li

Xue-Qiang Li

Department of Chemistry and the State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China

Department of Chemistry and the Key Laboratory of Natural Gas Conversion, Ningxia University, Yinchuan, Ningxia 750021, China

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Qin He

Qin He

West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610000, China

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Yong-Qiang Tu

Yong-Qiang Tu

Tel.: 0086-0931-8912293; Fax: 0086-0931-8912582

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Fu-Min Zhang

Fu-Min Zhang

Department of Chemistry and the State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China

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Shu-Yu Zhang

Shu-Yu Zhang

Department of Chemistry and the State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China

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First published: 17 September 2007
Citations: 4

Abstract

The stereocontrolled synthesis of the C(17)–C(28) fragment 3 of didemnaketal B was accomplished in 21 steps from the natural (R)-(+)-pulegone and (S)-(−)-citronellal. The key steps involved diastereoselective construction of two chiral carbon centers through the intramolecular chiral induction and uncommon Julia olefination of ketone forming the E-trisubstituted C(22)–C(23) double bound.

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