The use of transition metal salts in organic synthesis is an emerging area of research. Due to their low toxicity (LD50 [ZrCl4, oral rat] = 1688 mgKg-1), [ 1 ] low cost, ease of handling, and high catalytic activity, the Zr(IV) compounds are potential green catalysts. ZrCl4 is a relatively weak Lewis acid, [ 2 ] which finds uses in Friedal-Crafts reaction, [ 3 ] Diels-Alder reactions, [ 4 ] asymmetric Diels-Alder reaction, [ 5 ] [2+2]-adduct formation, [ 6 ] and intramolecular cyclization. [ 7 ] The application of ZrCl4 in organic reactions is gaining renewed interests. Zirconium tetrachloride may be prepared by chlorination of heated zirconium, zirconium carbide, or a mixture of ZrO2 and charcoal. [ 8 ]