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Angew. , Int. Ed. 2002, 41, 340–343. ; Desmurs, J. ; Jost, S. (Rhodia Chimie). WO 0064905, 2000. ; Desmurs, J. ; Gissot, A. (Rhodia Chimie). WO 9959941, 1999. Feringa, B. ; Brandsma, L. Synthesis 1988, 316. ; Schlosser, M. Tetrahedron 1993, 49, 10271. ; George, A. V. ; de Jong, R. L. ; Brandsma, L. J. Chem. , Chem. Commun. 1984, 257. ; Brandsma, L. J. Org. Chem. 1984, 49, 3857. ; Que´guiner, G. Tetrahedron 2001, 57, 4059. ; Que´guiner, G. Tetrahedron 2001, 57, 4489. ; Fort, Y. Eur. J. Org. Chem.

218 Homoallylic ketones are obtained in 26–77% yield on treatment of aromatic, aliphatic, and -aminomethyl carboxylates with excess of an alkenylmagnesium bromide and a catalytic amount of copper salts in THF at À45  C. 220 Addition of BuMgBr–CuBr to -hydroxymethyl ethyl acrylate gives exclusively 1,4-adducts, although on cyclic systems allylic substitution takes place. 224 A number of chiral auxiliaries have been developed for performing 1,4-addition enantioselectively. Chiral oxazolidinones are often highly effective, affording the products with up to 99% ee.

Czech. Chem. Commun. 1987, 52, 2710. ; Schlosser, M. Tetrahedron Lett. 2000, 41, 667. ; Schlosser, M. Eur. J. Org. Chem. 2001, 3985. ; Leroux, F. Eur. J. Org. Chem. 2004, 1014. Snieckus, V. Chem. Rev. 1990, 90, 879. ; Coblens, K. ; Ganem, B. Tetrahedron Lett. 1981, 22, 4887. Morton, A. A. J. Am. Chem. Soc. 1947, 69, 969. ; Schlosser, M. J. Org. Chem. 1996, 61, 5430. Schlosser, M. Angew. , Int. Ed. Engl. 2005, 44, 376. ; Schlosser, M. Chimia 1996, 50, 650. ; Takagishi, S. Synlett 1990, 747. ; Schlosser, M.

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