Synthesis of Optically Active Condensed Tetrahydropyridines from α-Amino Esters
作者:Jürgen Liebscher、Heike Faltz、Christoph Bender
DOI:10.1055/s-2006-950192
日期:2006.9
condensed dihydropyridones 6 could be synthesized from a-amino esters 2 or 3 and o-bromobenzyl bromides or heterocyclic analogues 1. These products resemble isoquinoline and β-carboline alkaloid structures and could be stereoselectively transformed into condensed 4-hydroxytetrahydropyridines 7 and 8 by reaction with Grignard reagents or reduction. Treatment of condensed 4-allyl or 4-homoallyl-4-hydroxypyridines
Double Cyclization of Bis(α-hetarylmethyl)amino Esters to Optically Active Bridged N-Heterocycles of HIV-Inhibiting Activity
作者:Heike Faltz、Christoph Bender、Birgitta M. Wöhrl、Karin Vogel-Bachmayr、Ullrich Hübscher、Kristijan Ramadan、Jürgen Liebscher
DOI:10.1002/ejoc.200400136
日期:2004.8
were synthesized by several routes starting from natural α-amino esters 2 and o-haloaryl- or o-bromohetarylmethyl bromides 1. N-Alkylation of the starting aminoesters to 5 and 3 was followed by halogen/lithium exchange and doublecyclization. The cyclization products 6 exhibit interesting inhibition of RNase H and DNA-polymerase activity of reverse transcriptase (RT) of HIV-1 at concentrations where