Synthesis of Coumarines and 4H-Chromenes through the Reaction of tert-Butyl Isocyanide and Dialkyl Acetylenedicarboxylates in Presence of 2-Hydroxybenzaldehydes
Issa Yavari*, Hoorieh Djahaniani, Farough Nasiri Department of Chemistry, University of Tarbiat Modarres, P. O. Box 14115-175, Tehran, Iran Fax: +98(21)8006544; e-Mail: isayavar@yahoo.com;