1. For recent reviews, see:
2. aHou, X. L., Yang, Z., and Wong, H. N. C.Progress in Heterocyclic Chemistry;Gribble, G. W. and Joule, J. A., Eds.Pergamon:Oxford, UK, 2008; Vol. 19, p176.
3. bKeay, B. A. and Dibble, P. W.Comprehensive Heterocyclic Chemistry II;Katritzky, A. R., Rees, C. W., and Scriven, E. F. V., Eds.Elsevier:Oxford, UK, 1997; Vol. 2, p395.
4. Regioselective syntheses of substituted furans
5. Synthesis of multi-substituted furan rings: the role of silicon