1. For recent books on PTC, see: (a) Phase-Transfer Catalysis. Mechanism and Synthesis; Halpern, M. E., Ed.; American Chemical Society: Washington, DC, 1997; (b) Handbook of Phase Transfer Catalysis; Sasson, Y.; Neumann, R., Eds.; Blackie A. & M.: London, 1997; (c) Shioiri, T.; Arai, S. In Stimulating Concepts in Chemistry; Vogtle, F.; Stoddart, J. F.; Shibasaki, M., Eds.; Wiley-VCH: Germany, 2000; pp. 123–143
2. Newman, M. S.; Magerlein, B. J. Organic Reactions, 1949; Chapter 10, pp. 413–441.
3. For an acyclic ketone system, see: (a) Arai, S.; Shioiri, T. Tetrahedron Lett.1998, 39, 2145–2148;
4. (b) Arai, S.; Shirai, Y.; Ishida, T.; Shioiri, T. Tetrahedron1999, 55, 6375–6386.
5. For a cyclic ketone system, see: (c) Arai, S.; Shirai, Y.; Ishida, T.; Shioiri, T. Chem. Commun. 1999, 49–50.