Barancelli DA, Mantovani AC, Jesse C, Nogueira CW, Zeni G. Synthesis of natural polyacetylenes bearing furan rings.
JOURNAL OF NATURAL PRODUCTS 2009;
72:857-860. [PMID:
19366257 DOI:
10.1021/np9000637]
[Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The first total syntheses of four new polyacetylene compounds have been achieved using convergent routes, which involved Cadiot--Chodkiewicz copper-catalyzed cross-coupling reactions to sp-sp centers as the key steps. 19-Furan-2-ylnonadeca-5,7-diynoic acid (1), 19-furan-2-ylnonadeca-5,7-diynoic acid methyl ester (2), 2-pentacosa-7,9-diynylfuran (3), and 21-furan-2-ylhenicosa-14,16-diyn-1-ol (4) were stable and could be readily identified, isolated, and purified in high overall yields.
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