1. For a review, see: Tafesh, A. M.; Weiguny, J. Chem. Rev. 1996, 96(6), 2035. Also, see: (a) Reetz, M. T.; Frombgen, C. Synthesis 1999, 1555. (b) Wang, X.; Xu, M.; Lian, H.; Pan, Y.; Shi, Y. Synth. Commun. 1999, 29, 3031.
2. For palladium- and platinum-catalyzed heterogeneous systems, see: (a) Bae, J. W.; Cho, Y. J.; Lee, S. H.; Yoon, C. M. Tetrahedron Lett. 2000, 41, 175.
3. (b) Chen, F.; Yan, Q.; Shao, L.; Liu, M. Lizi Jiaohuan Yu Xifu 1999, 15, 572.
4. (c) Kantam, M. L.; Bandyopadhyay, T.; Rahman, A.; Reddy, N. M.; Choudary, B. M. J. Mol. Catal. A: Chem. 1998, 133, 293.
5. (d) Islam, S. M.; Bose, A.; Palit, B. K.; Saha, C. R. J. Catal. 1998, 173, 268.