Synthesis of 7-, 8- and 9-membered rings via endo Heck cyclisations of amino acid derived substrates

Synthesis of 7-, 8- and 9-membered rings via endo Heck cyclisations of amino acid derived substrates
复制标题

通过氨基酸衍生底物的内切 Heck 环化合成 7、8 和 9 元环

DOI:
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发表时间:
1995
期刊:
影响因子:
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通讯作者:
R. Middleton
R. Middleton
中科院分区:
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文献类型:
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作者:
S. Gibson;R. Middleton

文献摘要

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通过二至四个亚甲基与脱氢丙氨酸单元连接的芳基碘化物在无水 Jeffery 条件下进行分子内 Heck 反应,通过内环化模式生成 7、8 和 9 元环;在更苛刻的条件下,通过外型环化形成的钯中间体表示为还原产物。
Aryl iodides tethered to dehydroalanine units by two to four methylene groups undergo intramolecular Heck reactions under anhydrous Jeffery conditions to give 7-, 8- and 9-membered rings by the endo-mode of cyclisation; under harsher conditions, a palladium intermediate formed by the exo-mode of cyclisation is expressed as reduced products.