Unexpected Formation of Thiophene-annulated Tetrahydro-3- benzazepines by Alkylation of Thiolactams with Ethyl Bromoacetate
作者:Soumya Sarkar、Roland Fröhlich、Bernhard Wünsch
DOI:10.5560/znb.2013-3030
日期:2013.3.1
synthesize enantiomerically pure tetrahydro-3-benzazepines with diverse substitution patterns, the lactams 3 were converted into thiolactams 4 upon treatment with Lawesson’s reagent. Instead of an Eschenmosersulfidecontraction a thiophene annulation reaction occurred, when the thiolactams 4 were reacted with ethyl bromoacetate. Altogether, enantiomerically pure thiopheneannulated 3-benzazepines 7 were prepared