Quinolizidine alkaloids are synthesized from glutarimide yields via a piperidine ring transformation that is based on the lupinine biosynthesis. A short enantioselective bispiperidine synthesis usingR-phenylglycinol as a chiral precursor is described.
Cyclopropanation Reactions for the Synthesis of 2-Azabicyclo[4.1.0]heptane Derivatives with Nitric Oxide Synthase Inhibitory Activity
作者:Irene Suárez del Villar、Ana Gradillas、Angel Gómez-Ovalles、Ricardo Martínez-Murillo、Alfredo Martínez、Javier Pérez-Castells
DOI:10.1246/cl.2008.1222
日期:2008.12.5
Synthesis of new bicyclic structures containing cyclopropanes, related to selective iNOS inhibitor ONO-1714, is described. We have evaluated the effect of the compounds obtained on the production of nitric oxide in lipopolysaccharide and interferon-gamma stimulated mouse peritoneal macrophages and on in vitro iNOS activity assays.
Synthesis of 2-Azabicyclo[4.1.0]heptanes through Stereoselective Cyclopropanation Reactions
作者:Irene Suárez del Villar、Ana Gradillas、Javier Pérez-Castells
DOI:10.1002/ejoc.201000863
日期:2010.10
catalysed by metal complexes. A study of the reaction conditions, stereochemical outcome and group protection is reported. The resulting bicyclic products are related to bioactive compounds. Transformation into thiolactams facilitates the separation of the different isomers obtained and the removal of the protecting group. The cyclopropanationreaction works with diverse diazo compounds.
Organocatalytic Enantioselective Functionalization of Cyclic α-Hydroxyamides: Access to Chiral Cyclic Imides and Azapolycyclic Compounds
作者:Xiao-Qian Zhang、Yuan-Ren Ma、Yan-Kai Liu
DOI:10.1021/acs.orglett.3c03182
日期:2023.11.24
convert unfunctionalized cyclic α-hydroxyamides into chiral cyclic α-hydroxyamides by reacting with vinyl sulfones, which could be used as versatile azacyclic synthons in the following sequences: (1) as the precursors of cyclic N-acyliminium ions to prepare natural productlike chiral azapolycyclic compounds under acidic conditions and (2) to construct chiral cyclicimides bearing unilateral substituents