Ruthenium-Catalyzed Selective Hydrogenation of bis-Arylidene Tetramic Acids. Application to the Synthesis of Novel Structurally Diverse Pyrrolidine-2,4-diones
作者:Christos S. Karaiskos、Dimitris Matiadis、John Markopoulos、Olga Igglessi-Markopoulou
DOI:10.3390/molecules16076116
日期:——
Catalytic hydrogenation of 3,5-bis-arylidenetetramic acids, known for their biological activity, has been developed. The chemoselective ruthenium-catalyzed reduction of the exocyclic carbon-carbon double bonds on pyrrolidine-2,4-dione ring system, containing other reducible functions, has been investigated. Depending on the substrate the yield of the hydrogenation process can reach up to 95%. The structural
A series of piperidine-2,3,5-triones (azagrevellins) has been prepared. A new synthesis has been introduced using the rearrangement of spiroepoxides in the presence of triethyloxonium tetrafluoroborate. The binding affinity toward the N-methyl-D-aspartate (glycine site) receptor has been measured to provide a basis for more detailed structure-activity studies. Azagrevellin 18d showed the highest binding potency.