Synthesis 2020; 52(23): 3650-3656
DOI: 10.1055/s-0040-1706423
paper
© Georg Thieme Verlag Stuttgart · New York

Divergent and Diastereoselective Synthesis of α-Monosubstituted and trans-α,β-Disubstituted γ-Lactams from (S)-N,N-Dibenzyl-α-amino Aldehydes via Henry and Michael Reactions

Francine P. Meirelis
,
Bruna G. N. Vieira
,
Vera L. P. Pereira
Instituto de Pesquisas de Produtos Naturais, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Bloco H, Cidade Universitária, 21941-902, Rio de Janeiro, Brazil   eMail: patrocinio.ufrj@gmail.com
› Institutsangaben
Weitere Informationen

Publikationsverlauf

Received: 07. Juli 2020

Accepted after revision: 20. Juli 2020

Publikationsdatum:
24. August 2020 (online)


Abstract

γ-Monosubstituted and trans-α,β-disubstituted γ-lactams were diastereoselectively synthesized from common intermediates (S)-N,N-dibenzylated aldehydes derived from natural l-(α)-amino acids, employing a divergent approach. The key features of the routes include diastereoselective Henry and Michael reactions that produced chiral γ-nitroester derivatives, which were subsequently submitted to a tandem reduction-lactamization sequence providing the title compounds. The versatility of routes can allow the preparation of several other mono-, di-, or tri-substituted γ-lactams.

Supporting Information