1. (b) Sugiura, Y.; Takita, T.; Umezawa, H. InMetal Ionsin Biological Systems; Sigel, H., Ed.; Marcel Dekker: New York, 1985; pp 81−108.
2. (c) Ohno, M.; Otsuka, M. InRecent Progress in the ChemicalSynthesis of Antibiotics; Lukacs, G., Ohno, M., Eds.; Springer-Verlag: New York, 1990; pp 387−414.
3. Synthesis of .beta.-lactams by the photolytic reaction of chromium carbene complexes with imines