Trimethylindolenines as C–N synthons for the assembly of spiro[oxindole-thioxoimidazolidine-indoline] hybrids in formal [3+2] cycloadditions

Abstract

Herein a previously unreported trimethylindolenines serving as useful C-N synthons in [3+2] cycloaddition reactions of donor-acceptor 3-isothiocyanato oxindoles to build a library of spiro[oxindole-thioxoimidazolidine-indoline] hybrids is described. A wide range...