Transition Metal-Alkyne Complexes

Schore, N. E. Transition Metal Alkyne Complexes Pauson-Khand Reaction. In Comprehensive Organometallic Chemistry II Abel, E. W., Stone, F. G. A., Wilkinson, G., Eds. Elsevier Oxford, 1995 Vol. 12, pp 703-739. 

Schore NE (1991) Org React 40 1 Schore NE (1991) The Pauson-Khand reaction. In Trost BM (ed) Comprehensive organic synthesis, vol 5. Pergamon Press, Oxford, p 1037 Pauson PL (1985) Tetrahedron 41 5855 Schore NE (1995) Transition metal alkyne complexes Pauson-Khand reaction. In Abel EW, Stone EGA, Wilkinson G (eds) Comprehensive organometallic chemistry II, vol 12. Pergamon Press, Oxford, p 703 Iwasawa N (1992) Chem Lett 473... 

In contrast to many stable transition metal-alkyne complexes, cationic cyclopentadienyliron-alkyne complexes are reactive toward a range of nucleophiles. However, since most of the nucleophiles studied were carbanions, discussion of this chemistry is deferred to Volume 4, Chapter 3.2, Section 3.2.3. 

Transition Metal Alkyne Complexes Containing Trifluorophosphine... 

Chung CY. Transition metal alkyne complexes the Pauson-Khand reaction. Coord. Chem. Rev. 1999 188 297-341. Brummond KM, Kent JL. Recent advances in the Pauson-Khand reaction and related (2 + 2+1) cycloadditions. Tetrahedron 2000 56 3263-3283. 

Keun Chung, Y. Transition metal alkyne complexes the Pauson-Khand reaction. Coord. Chem. Rev. 1999, 188, 297-341. 

Eor a recent review, see Schore NE (1995) Transition Metal Alkyne Complexes Pauson-Khand Reaction. In Louis Hegedus (vol ed), Abel EW, Stone EGA,Wlkmson G (eds) Comprehensive OrganometaUic Chemistry II. Pergamon, Kidlington, vol 12,703... 

Transition metal alkyne complexes also react with nucleophiles, in this case to generate CT-vinyl complexes. There are fewer stable alkyne complexes of higher oxidation state or cationic metals than olefin complexes. Because these types of alkyne complexes are most susceptible to nucleophilic attack, less information is available on tfiis reaction than on nucleophilic attack on coordinated alkenes. Nevertheless, reactions of several cationic alkyne complexes with nucleophiles have been reported, and a few examples are presented here. 

It is our intent in this chapter to point out the potential utility of transition metal-alkyne complexes and cluster compounds which may be derived from them as reagents in organic synthesis. In the interests of brevity, we have chosen to limit the discussion to the organic chemistry of isolable acetylene complexes. Those reactions of particular synthetic promise for which alkyne complexes have not been demonstrated to be intermediates, but whose course very likely involves such complexes, will be mentioned only briefly. 

TRANSITION METAL-ALKYNE COMPLEXES AND CLUSTER COMPOUNDS... 

In Volume II, which will be published in the near future, the following topics will be covered The Potential Utility of Transition Metal-Alkyne Complexes and Derived Cluster Compounds as Reagents in Organic Synthesis (K. M. Nicholas, M. O. Nestle, and D. Seyferth) Arene Complexes in Organic Synthesis (G. Jaouen) and Oxidation, Reduction, Rearrangement, and Other Synthetically Useful Processes (H. Alper). 

Grothahn, D.B. (1995) Transition metal alkyne complexes transition metal catalyzed cyclotrimerization, in Comprehensive Organometallic Chemistry II, vol. 12 (eds. E.W. Abel, F.G.A. Stone, G. Wilkinson, and L.S. Hegedus), Pergamon, Oxford, pp. 741-770. 

---