New kilogram-synthesis of the anti-alzheimer drug (−)-galanthamine

Autor: Czollner, Laszlo, Frantsits, Werner, Küenburg, Bernhard, Hedenig, Ursula, Fröhlich, Johannes, Jordis, Ulrich
Zdroj: Tetrahedron Letters; January 1998, Vol. 39 Issue: 15 p2087-2088, 2p
Abstrakt: A concise, scalable synthesis of (−)-galanthamine, a drug being used for the treatment of Alzheimer's disease, is described. The yield of the critical phenolic coupling step was optimized to 45–50%. For the reduction of the aryl bromide, air-activated LiAIH 4was used and racemic narwedine was converted to (−)-narwedine by a second order asymmetric transformation.
Databáze: Supplemental Index