Processes for the preparation of derivatives of 4a, 5, 9, 10, 11, 12-hexahydro-6H-benzofuro-[3a, 3, 2-ef][2]benzazepine
申请人:Sanochemia Pharmazeutica
公开号:US06369238B1
公开(公告)日:2002-04-09
The invention relates to processes for the preparation of 4a,5,9,10,11,12-hexahydro-6H-benzofuro[3a,3,2-ef][2]benzazepine, or derivatives thereof. Furthermore, the invention also relates to the compounds formed during the preparation of 4a, 5,9,10,11,12-hexahydro-6H-benzofuro[3a,3,2-ef][2]benzazepine.
From simple N-isovanillyltyramine derivatives double oxidative biotransformations can be achieved using tyrosinase lead- ing to the corresponding hydroxylated dibenzoazocanes.
Facile synthesis of (±)-, (+)-, and (-)-galanthamine
作者:Jerzy Szewczyk、Joseph W. Wilson、Anita H. Lewin、F. Ivy Carroll
DOI:10.1002/jhet.5570320132
日期:1995.1
evaluated as a potential agent for the treatment of Alzheimer's disease. We report a very efficent synthesis of (±)-galanthamine [(±)-1a] from readily available isovanillin and tyramine. We have separated racemic galanthamine into its diastereoisomeric (1S)-camphanate esters and obtained both natural (-)- and unnatural (+)-galanthamine by lithium aluminum hydride removal of the acyl group.