New chiral synthons for efficient introduction of bispropionates via stereospecific oxonia-cope rearrangements
New chiral synthons for efficient introduction of bispropionates via stereospecific oxonia-cope rearrangements
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DOI:
10.1021/ja061082f
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发表时间:
2006-04-12
影响因子:
15
通讯作者:
McDonald, FE
中科院分区:
文献类型:
--
作者:
Chen, YH;McDonald, FE
Compounds1and2are novel synthons for bispropionate synthesis, undergoing stereospecific Lewis acid-catalyzed transfer of the bispropionate unit with a variety of aldehydes, including α-chiral aldehydes. Thus1leads to theE-alkene bispropionate3withanti-stereochemistry, whereas diastereomer2gives theZ-alkene product4, under mild conditions and with complete stereospecificity. The efficacy of this methodology is demonstrated in a short synthesis of invictolide beginning with2and (R)-2-methylpentanal.