Addition of Tethered Nonaromatic Carbon Nucleophiles to Chemoselectively Activated Amides
作者:Guillaume Bélanger、Robin Larouche-Gauthier、Frédéric Ménard、Miguel Nantel、Francis Barabé
DOI:10.1021/ol0516519
日期:2005.9.1
text] In an effort to develop new ways of synthesizing polycyclic alkaloids, we successfully added silyl enol ethers, allylsilanes, and enamines to iminium ions generated from amides. Because of their higher oxidation state, such iminiums show a yet unexploited advantage of potential double cyclizations over standard Mannich monocyclizations. We report herein the first example of tethered nonaromatic
[反应:见正文]为了开发合成多环生物碱的新方法,我们成功地将甲硅烷基烯醇醚,烯丙基硅烷和烯胺添加到酰胺生成的亚胺离子上。由于其较高的氧化态,与标准的曼尼希单环化反应相比,此类亚胺具有潜在的双环化作用,但尚未开发出优势。我们在此报道了将束缚的非芳香族碳亲核试剂添加到活化酰胺中以产生具有内环或外环氮的各种环大小的烯胺的第一个实例。