From targeted aza-Michael addition to linked azaheterocyclic scaffolds
作者:Orazio A. Attanasi、Lucia De Crescentini、Paolino Filippone、Gianluca Giorgi、Simona Nicolini、Francesca R. Perrulli、Stefania Santeusanio
DOI:10.1016/j.tet.2014.07.038
日期:2014.10
phenyl-linked bis(thiohydantoin) derivatives and (thio)hydantoins spiro-fused to pyrroline ring has been developed. All the synthetic strategies here presented rely on initial aza-Michael addition followed by acylation/regioselective ring-closure step involving DD, primary amine and iso(thio)cyanate in a 3-CR providing 1,3,5-trisubstituted (thio)hydantoins. The choice of opportune acyclic reagents in the