C regioselectivity

C. Regioselective silylation of ketones by in situ enolate trapping... 

Smith, K., Almeer, S. and Peters, C. Regioselective mononitration of aromatic compounds by zeolite/dinitrogen tetroxide/air in a solvent-free system, Chem. Commun., 2001, 2748-2749. 

Salaun, J.P., Weissbart, D., Helvig, C., Durst, F., and Mioskowski, C, Regioselective hydroxylation and epoxidation of lauric acid and unsaturated analogs by cytochrome P450 in Jerusalem artichoke microsomes, Plant Physiol. Biochem., 31, 285-293, 1993. 

Yuan, C.-Y, Wang, K., and Li, Z.-Y, Studies on organophosphorus compounds. Part 110. Enantioselective reduction of 2-keto-3-haloaIkane phosphonates by baker s yeast, Heteroat. Chem., 12, 551, 2001. Gassama, A., d Angelo, J., Cave, C., Mahuteau, J., and Riche, C., Regioselective annulation of 1.5-diketones. Access to functionalized Hagemann s esters, Eur. J. Org. Chem., 3165, 2000. 

Ezquerra, J., de Mendoza, J., Pedregal, C., and Ramirez, C., Regioselective nucleophilic attack on N-Boc-pyroglutamate ethyl ester, Tetrahedron Lett., 33, 5589, 1992. 

Similar conditions convert the l,3-dioxolan-4-ones 46a-c regioselectively to a single diastereoisomer of 47a-c (Scheme 9) [33]. 

C). Regioselectivity was observed in the cyclizations of the ketones 274 and 276, from which only products with angular aromatic ring structures, 275 (15%, m.p. 212°C) and 277 (16%), were isolated. The strong preference for formation of an angular aromatic system was clearly noted in the Elbs reaction of ketone 279, which produced 280 (m.p. 150°C) by cyclization with... 

In a reverse micellar system containing NaPtCl4 in D2O, AOT, and the substrate, CH/CD exchange occurs under mild conditions (80 °C) regioselective in the methyl group. One of the main fields of application of reverse micelles is the entrapment of enzymes in the water cavity [28]. 

Richard, C., Regioselectivity of oxidation by positive holes (h ) in photocatalytic... 

Liu S, Pestano JPC, Wolf C. Regioselective copper-catalyzed C—N and C—S bond formation using amines, thiols and hal-obenzoic acids. Synthesis 2007 3519-3527. 

Duraud A, Toffano M, Fiaud J-C. Regioselective metal-catalyzed hydrophosphinylation of alkynes synthesis of enantio-pure a- or (i-huhstituted vinylphosphane oxides. Eur. J. Org. Chem. 2009 2009 4400-4403. 

With acrylonitrile, the same catalyst exhibits low regioselectivity between the olefin and nitrile functionalities at 80°C, whereas at 25°C, regioselectively (97%) hydrates 6.1 mol of acrylonitrile/(mol of catalyst h) to acrylamide. 

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