Asieh Kargar-Dolatabadi - Department of Chemistry, Payame Noor University, PO BOX ۱۹۳۹۵-۳۶۹۷, Tehran, Iran
Abdolkarim Zare - Department of Chemistry, Payame Noor University, PO BOX ۱۹۳۹۵-۳۶۹۷, Tehran, Iran

In this work, a rapid and highly effectual protocol for the synthesis of       bis-coumarins has been developed. The one-pot quasi three-component reaction of aromatic aldehydes (1 eq.) with 4-hydroxycoumarin (2 eq.) in the presence of catalytic amount of protic acidic ionic liquid triethylaminium-N-sulfonic acid tetrachloroaluminate (TSAT) under solvent-free conditions afforded the mentioned compounds in high yields and short reaction times.

Bis-coumarin, 4-Hydroxycoumarin, Protic acidic ionic liquid, Triethylaminium-N-sulfonic acid tetrachloroaluminate (TSAT), Solvent-free