Solution-phase total synthesis of the hydrophilic natural product argifin using 3,4,5-tris(octadecyloxy)benzyl tag

A solution-phase total synthesis of argifin using 3,4,5-tris(octadecyloxy)benzyl tag as a hydrophobic protective group of carboxylic acid was developed to produce 44% overall yield for 16 linear steps. Argifin, a novel class of natural product chitinase inhibitor, is a highly water-soluble cyclic pe...

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Veröffentlicht in:Tetrahedron 2011-09, Vol.67 (35), p.6633-6643
Hauptverfasser: Hirose, Tomoyasu, Kasai, Takako, Akimoto, Takafumi, Endo, Ayako, Sugawara, Akihiro, Nagasawa, Kazuo, Shiomi, Kazuro, Ōmura, Satoshi, Sunazuka, Toshiaki
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Sprache:eng
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Zusammenfassung:A solution-phase total synthesis of argifin using 3,4,5-tris(octadecyloxy)benzyl tag as a hydrophobic protective group of carboxylic acid was developed to produce 44% overall yield for 16 linear steps. Argifin, a novel class of natural product chitinase inhibitor, is a highly water-soluble cyclic pentapeptide, so hitherto, only solid-phase synthesis techniques have been used to conveniently prepare the compound and its derivatives. 3,4,5-Tris(octadecyloxy)benzyl alcohol (HO-TAGa) and its esters are highly crystalline materials and highly capable of dissolving in less-polar solvents such as dichloromethane, benzene, THF, etc., but insoluble in polar solvents such as methanol and DMSO. The combination of HO-TAGa and Fmoc-based peptide synthesis, together with simple purification by recrystallization from MeOH solution, furnished an efficient and practical route of argifin production in the liquid-phase. [Display omitted]
ISSN:0040-4020
1464-5416
DOI:10.1016/j.tet.2011.05.073