Doebner condensation in ionic liquids [Bmim]BF4 and [Bpy]BF4 to synthesize α, β-unsaturated carboxylic acid

Rajagopalan, 1955, Org. Synth. Coll., 3, 425 Johnson, 1942, Org. React., 1, 210 Chen, 2007, Chin. Chem. Lett., 18, 27, 10.1016/j.cclet.2006.11.027 Jiang, 2008, Chin. Chem. Lett., 19, 889, 10.1016/j.cclet.2008.04.035 Carmichael, 2000, Chem. Commun., 0, 1237, 10.1039/b003335i Wang, 2006, J. Mol. Catal. A, 253, 212, 10.1016/j.molcata.2006.03.035 Kabalka, 2004, Tetrahedron Lett., 45, 729, 10.1016/j.tetlet.2003.11.049 Li, 2007, Chin. J. Org. Chem., 27, 1296 Zhang, 2003, Green Chem., 5, 267, 10.1039/b212155g Ohlin, 2004, Chem. Commun., 4, 1070, 10.1039/b401537a Chauhan, 2003, Chem. Commun., 3, 2348, 10.1039/b305888c Park, 2001, J. Org. Chem., 66, 8395, 10.1021/jo015761e