RSS-Feed abonnieren
Bitte kopieren Sie die angezeigte URL und fügen sie dann in Ihren RSS-Reader ein.
https://www.thieme-connect.de/rss/thieme/de/10.1055-s-00000084.xml
Synthesis 2003(12): 1903-1908
DOI: 10.1055/s-2003-40979
DOI: 10.1055/s-2003-40979
PAPER
© Georg ThiemeVerlag Stuttgart · New York
4-Formylazetidin-2-ones, Synthonfor the Facile Synthesis of Enantiopure 4-Aminopiperidin-2-ones
Weitere Informationen
Publikationsverlauf
Received
31 March 2003
Publikationsdatum:
30. Juli 2003 (online)


Abstract
Enantiopure 4-formylazetidin-2-ones 1a-d have been used as building blocks forthe synthesis of 4-aminopiperidin-2-ones 6a-d in 28-39% overall yields.The synthesis involves ring expansion of azetidinone 4a-d via methanolysis followed by a reductivecyclization of the C-4 nitroethyl side chain with an ester group.
Key words
lactams - reductions - cyclizations - aldolreactions - piperidines - esters