所述的全合成马钱子生物碱(±)-minfiensine经由分子内amidofuran狄尔斯-阿尔德环加成来实现/重排,随后亚胺离子/环化级联序列。这种多米诺骨牌工艺可快速进入在生物碱米非芬新碱中发现的独特的1,2,3,4-四氢-9a,4a-亚氨基乙基咔唑核心结构(2)。在本文中,我们对合成研究进行了全面描述,突出了级联序列成功地以高收率形成(±)-minfiensine(2)的A / B / C / D环的应用。然后使用钯催化的烯醇盐偶联反应提供最终的E环,并完成(±)-minfiensine(2)的总合成。
Regioselective Heck reaction of aliphatic olefins and aryl halides
作者:Liena Qin、Hajime Hirao、Jianrong (Steve) Zhou
DOI:10.1039/c3cc45911j
日期:——
A regioselective Heck reaction of aliphaticolefins and aryl bromides is realized at internal carbons of olefins. Methanol solvent promoted halide ionization from neutral arylpalladium halide complexes via hydrogen bonding, so as to create cationic aryl-Pd species for regioselective olefin insertion.
Intramolecular Diels–Alder Cycloaddition/Rearrangement Cascade of an Amidofuran Derivative for the Synthesis of (±)-Minfiensine
作者:Gang Li、Albert Padwa
DOI:10.1021/ol201320v
日期:2011.8.5
An efficient synthesis of (±)-minfiensine has been accomplished employing an intramolecular Diels–Alder cycloaddition/rearrangement cascade of an amidofuran derivative. Thermal reorganization of the initially formed [4 + 2]-cycloadduct affords the critical tetrahydroiminoethanocarbazole skeleton of the alkaloid in high yield.
IMDAF Cascade Approach toward the Synthesis of the Alkaloid (±)-Minfiensine
作者:Carolyn A. Leverett、Gang Li、Stefan France、Albert Padwa
DOI:10.1021/acs.joc.6b00771
日期:2016.11.4
The total synthesis of the Strychnos alkaloid (±)-minfiensine was achieved via an intramolecular amidofuran Diels–Alder cycloaddition/rearrangement followed by an iminium ion/cyclization cascade sequence. This domino process provides for a rapid access to the unique 1,2,3,4-tetrahydro-9a,4a-iminoethanocarbazole core structure found in the alkaloid minfiensine (2). In this paper, the full account of
所述的全合成马钱子生物碱(±)-minfiensine经由分子内amidofuran狄尔斯-阿尔德环加成来实现/重排,随后亚胺离子/环化级联序列。这种多米诺骨牌工艺可快速进入在生物碱米非芬新碱中发现的独特的1,2,3,4-四氢-9a,4a-亚氨基乙基咔唑核心结构(2)。在本文中,我们对合成研究进行了全面描述,突出了级联序列成功地以高收率形成(±)-minfiensine(2)的A / B / C / D环的应用。然后使用钯催化的烯醇盐偶联反应提供最终的E环,并完成(±)-minfiensine(2)的总合成。