作者:Rodolfo Lavilla、Teresa Gotsens、Sonia Rodríguez、Joan Bosch
DOI:10.1016/s0040-4020(01)88234-x
日期:1992.1
The reactivity of pyridinium salts 2 towards nucleophiles has been studied. The interaction with enolates derived from esters 1 gave only trace amounts of the expected compounds 3. Irreversible-type additions, however, allowed the preparation of indolyldihydropyridines 8 and 9 with high yields. Reaction of organometallic 10 with salt 2c, followed by acidic cyclization, afforded tetracycle 12.
已经研究了吡啶鎓盐2对亲核试剂的反应性。与衍生自酯1的烯醇化物的相互作用仅产生痕量的预期化合物3。然而,不可逆型添加使得可以高产率制备吲哚基二氢吡啶8和9。有机金属10与盐2c反应,然后进行酸性环化,得到四环化合物12。