Hydroxylamin-Funktion als Nachbargruppe bei Dehydrierungen / Hydroxylamine Function as Neighboring Group with Dehydrogenations
作者:Hans M¨ohrle、Petra Arndt
DOI:10.1515/znb-2005-0614
日期:2005.6.1
The β -amino-hydroxylamines 5a - d are prepared of the α-amino-oximes 1a - d with boranedimethylsulfide. With mercury-EDTA, 5a - d react to (E/Z)-oxime-lactams 3a - d and benzaldoxime 7. Additionally 5b,c give the bicyclic amidine-N-oxides 8b,c, which slowly hydrolyze to the hydroxylamine-lactams 9b,c. These are easily oxidized to (E/Z)-3b,c. Postulated as intermediates in the mercury-assisted reduction