Co(302012.04.14

Co271735G.Brandt CobaltKobold

Vitamin B12

BrCoIII (salen)PPh3CoII (salophen)CobaloximeOrganocobaltInorganocobalt

. Vitamin B12 Catalyred Radical ReactionsScheffold, R.; Abrecht, S.; Orlinski, R.; Hans-Rudolf, R.; Stamouli, P.; Tinembart, 0.; Walder, L.; Weymuth, C. Pure Appl. Chem. 1987, 59, 363.

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1.Heck-type2.C=N3.4.5.

. Organocobalt-Mediated Radical Reactions

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Branchaud, B. P. J. Org. Chem. 1988,53, 4641.

Bruce P. Branchaud Tetrahedron Letters, 1988.29,6545. (b) Bruce P. Branchaud Tetrahedron Letters, 1991.32, 3639.C=N

Bruce P. Branchaud, Tetrahedron Letters, 1997,38, 7009, (a) V. F. Patel. G. Pattenden. and J. J. Russell, Tetrahedron Lett.. 1986. 27. 2303(b) H. Bhandal. G. Pattenden. and J. J. Russell. Tetrahedron Lett.. 1986, 27. 2299;

(a) D. J. Coveney, V. F. Patel, and G. Pattenden, Tetrahedron Lett., 1987, 28, 5949. (b) Vinod F. Patel and Gerald Pattenden, Tetrahedron Lett., 1988,29, 707.

100 W sunlamp

(a) V. F. Patel. G. Pattenden. and J. J. Russell, Tetrahedron Lett.. 1986. 27. 2303; (b) H. Bhandal. G. Pattenden. and J. J. Russell. Tetrahedron Lett.. 1986, 27. 2299; (c) M. Ladlow and G. Pattenden. ihicl.. 1983. 25, 4317;(d) M. J. Begley, M. Ladlow. and G. Pattenden, .Chem. Soc., Perkin Trcins. I , 1988, 1095.

Richard A. Earl and K. Peter C. Vollhardt. J. Am. Chem. Soc. 1983, 105, 6993.(a) Aalbersberg, W. G. L.; Barkovich, A. J.; Funk, R. L.; Hilliard, R. L., III; Vollhardt, K. P. C. J. Am. Chem. Soc. 1975,97,5600; (b) Hilliard, R. L., 111; Vollhardt. K. P. C. J. Am. Chem. Soc. 1977,99,4058; c)Halter", R. L.; Nguyen, N. H.; Vollhardt, K. P. C. J. Am. Chem. Soc. 1985,107, 1379.. Inorganocobalt-Mediated Radical Reactions

Gesing, E. R. F.; Tane, J. P.; Vollhardt, K. P. C. Angew. Chem. Int. Ed. 1980,19, 1023.Brian L. Pagenkopf and Tom Livinghouse, J. Am. Chem. Soc. 1996, 118, 2285.

(a) Vollhardt, K.P.C. Angew.Chem.,Int. Ed.1984,23,539;(b)Barbara Heller, J. Org. Chem. 2002, 67, 4414-4422;(c) Barbara Heller, J. Org. Chem. 2003, 68, 9221-9225; (d)Pilar Prieto, Jos Ignacio Garca, Chem. Eur. J. 2012, ASAPtwo 460 W lampsC. Aubert, M. Malacria. Org. Lett. 2004. 6, 3937.

Marko Hapke, J. Org. Chem. 2010, 75, 3993.K. Peter C. Vollhardt, Synlett, 1989, 15.

Malacria, M.; Vollhardt, K. P. C. J. Org. Chem. 1984, 49,5010(a) Sheward, G. S.; Vollhardt, K. P. C. J. Org. Chem.1986,51,5491;(b) Grotjahn, D. B.; Vollhardt, K. P. C. J. Am. Chem. Soc. 1986,108. 2091.

Caubere. P.. J. Org. Chem. 1983,48, 1919.Caubere. P. J. Org. Chem. 1983, 48, 1166.

Vincent Gandon, Max Malacria, and Corinne Aubert. Organometallics 2007, 26, 819.