A novel isocyanide-based three-component condensation reaction: Synthesis of fully substituted imino- and spiroiminocyclopentenes

摘要

The zwitterion formed from alkyl or aryl isocyanides and dialkyl acetylenedicarboxylate added to electron-deficient tetracyanoethylene or 7,7,8,8-tetracyanoquinodimethane to form fully substituted imino- or spiroinimocyclopentenes in excellent yields without using catalyst.