Onium Phenoxides as Lewis Base Catalysts

Onium Phenoxides and Related Compounds as Br0nsted Base Catalysts 

As described in this chapter, numerous recent efforts to elaborate chiral onium salts have greatly expanded their use as asymmetric catalysts in organic synthesis. However, the full potential of chiral onium salts is yet to be reahzed in terms of general appUcability. Continuous efforts should be made toward the design and development of conceptually new catalysts, and to understanding the relationship between catalyst structure and stereocontroUing abiUty. 

3 (a) Dehmlow, E.V. and Dehmlow, S.S. (1993) Phase Transfer Catalysis, 3rd edn, Wiley-VCH Verlag GmbH, Weinheim  

Verlag Chemie, New York, pp. 727-756 (b) Shioiri, T. (1997) Handbook of Phase-Transfer Catalysis (eds Y. Sasson and R. Neumann), Blackie Academic Professional, London, ch. 14, pp. 

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