1. For reviews on chemistry of ynamines see (a) Ficini, J. Tetrahedron 1976, 32, 1448.
2. (b) Himbert, G. In Methoden Der Organischen Chemie (Houben-Weyl); Kropf, H., Schaumann, E., Eds.; Georg Thieme: Stuttgart, 1993; pp 3267–3443.
3. For reviews see: (a) Saalfrank, R. W.; Lurz, C. J. In Methoden Der Organischen Chemie (Houben-Weyl); Kropf, H., Schaumann, E., Eds.; Georg Thieme: Stuttgart, 1993; p 3093.
4. (b) Schuster, H. E.; Coppola, G. M. Allenes in Organic Synthesis; Wiley: New York, 1984.
5. For the few specific examples see: (a) Nijs, R.; Verkruijsse, H. D.; Harder, S.; van der Kerk, A. C. H. T. M.; Brandsma, L. Synth. Commun. 1991, 21, 653.