Organometallic Chemistry Research Perspectives by Richard P. Irwin

By Richard P. Irwin

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1992, 31, 2889-2892. ; Mongeot, H. Polyhedron. 1999, 18, 931-939. Zhizhin, K. ; Vovk, O. ; Malinina, E. ; Mustyatsa, V. ; Goeva, L. ; Polyakova, I. ; Kuznetsov, N. T. Russ. J. Coord. Chem. 2001, 27, 613-619. Sivaev, I. ; Votinova, N. ; Bragin, V. ; Starikova, Z. ; Goeva, L. ; Bregadze, V. ; Sjöberg, S. J. Organomet. Chem. 2002, 657, 163-170. ; Miele, P. J. Organomet. , 2004, 689, 2581-2585. Zhizhin, K. ; Mustyatsa, V. ; Malinina, E. ; Votinova, N. ; Matveev, E. ; Goeva, L. ; Polyakova, I. ; Kuznetsova, N.

635 MeV) make it the ideal PET halogen for high-resolution images. However, radiofluorination reactions of polyhedral boron hydrides have not yet been reported. 75Br is a potential PET imaging isotope with a reasonable half-life (97 min). 74 MeV), a 71% positron emission and second high energy gamma, all of which contribute to its overall poorer resolution for imaging. 76Br is a possible radionuclide for PET studies. 2 h and emits 54% positrons per decay, properties that are well suited for labeling.

This approach was first applied when phenylalanine and tyrosine residues in various bioactive peptides and polypeptides were replaced with the o-carborane cluster [91,94,268,269]. Later synthesis of carborane analogue of the anti-estrogen tamoxifen containing the carborane fragment in place of the A ring phenyl group was reported [270]. Endo et al. proposed to use carboranes as the cores from which to construct a series of potent estrogen receptor agonists [271-275] and antagonists [275-277]. The rationale behind the design of the agonists was that hydrophobic carborane cluster could be used in place of the C and D rings of 17β-estradiol, which play an important role in the binding of the steroid to the estrogen receptors through hydrophobic interactions.

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