are found in several biologically active molecules. Here, we report nucleophilicdominoreactions for the synthesis of α-methylene-γ-butyrolactone/lactam containing spirocyclic oxindoles. The Zn-mediated one-step reaction accommodates a range of substrates and can be used to rapidly generate focused libraries of highly substituted spirocyclic compound.
Face selective reduction of the exocyclic double bond in isatin derived spirocyclic lactones
作者:Sandeep Rana、Amarnath Natarajan
DOI:10.1039/c2ob27008k
日期:——
We report an unusual face selectivereduction of the exocyclic double bond in the α-methylene-γ-butyrolactone motif of spiro-oxindole systems. The spiro-oxindoles were assembled by an indium metal mediated Barbier-type reaction followed by an acid catalyzed lactonization.