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Synlett 2005(11): 1691-1694
DOI: 10.1055/s-2005-871549
DOI: 10.1055/s-2005-871549
LETTER
© Georg Thieme Verlag Stuttgart · New York
Studies toward the Total Synthesis of GKK1032A2, a Structurally Unique Antitumor Compound: Stereoselective Construction of the Tricarbocyclic System
Further Information
Received
15 April 2005
Publication Date:
14 June 2005 (online)
Publication History
Publication Date:
14 June 2005 (online)
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Abstract
The unique tricarbocyclic system in GKK1032A2, an antitumor agent from Penicillium sp. GKK1032, was constructed in a highly stereoselective manner, starting from a readily available Hajos-Wiechert ketone analog.
Key words
antitumor agents - carbocycles - Diels-Alder reactions - natural products - stereoselective synthesis
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References
Crystallographic data for 22: formula, C37H60O2Si; FW, 612.94; crystal system, orthorhombic; space group, P212121; a = 11.7726 (4) Å, b = 12.9543 (4) Å, c = 23.5023 (8) Å; V = 3584.2 (2) Å3; Z = 4; T = 170 K; D calcd = 1.136 g cm-1; λ(MoK α) = 0.71070 Å; R1 = 0.0418 [I>2σ(Ι)]; wR2 = 0.1082; GOF(F 2) = 1.064.