%0 Journal Article %A Seyed Meysam Baghbanian %A Mahmood Tajbakhsh %A Maryam Farhang %T Protic guanidinium ionic liquid as a green and highly efficient catalyst for the synthesis of functionalized spirochromenes under solvent-free conditions %J Comptes Rendus. Chimie %D 2014 %P 1160-1164 %V 17 %N 12 %I Elsevier %R 10.1016/j.crci.2013.12.005 %G en %F CRCHIM_2014__17_12_1160_0