Chemoselective and Regiospecific Synthesis of Iminospiro-<i>γ</i>-lactones from Maleic Anhydride or Citraconic Anhydride and Alkyl Isocyanides with Dialkyl Acetylenedicarboxylates
作者:Mohammad Bayat、Hossien Imanieh、Hossien Abbasi
DOI:10.1002/hlca.200900292
日期:2010.4
Isocyanides, dialkyl acetylenedicarboxylates (=dialkyl but‐2‐ynedioates), and anhydrides such as maleic anhydride (=furan‐2,3‐dione) or citraconicanhydride (=3‐methylfuran‐2,3‐dione) react in one pot to afford novel iminospiro‐γ‐lactones in fairly good yields at room temperature (Schemes 1 and 3).