Tetrahedron p. 6445 - 6454 (1992)
Update date:2022-08-11
Topics:
Lavilla, Rodolfo
Gotsens, Teresa
Rodiguez, Sonia
Bosch, Joan
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.
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(2018)
