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Bonnet, V.; Mongin, F.; Trécourt, F.; Breton, G.; Marsais, F.; Knochel, P.; Quéguiner, G. Synlett 2002, 1008. As stated in ref 1 of the preceding article, according to the MDL Drug Data Report, the most widespread heterocycles in pharmaceutically active compounds are pyridine (out of 15 000 structures), imidazole (out of 11 000), indole (out of 6700), and pyrimidine (out of 4500).
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Bonnet, V.; Mongin, F.; Trécourt, F.; Breton, G.; Marsais, F.; Knochel, P.; Quéguiner, G. Synlett 2002, 1008. As stated in ref 1 of the preceding article, "according to the MDL Drug Data Report, the most widespread heterocycles in pharmaceutically active compounds are pyridine (out of 15 000 structures), imidazole (out of 11 000), indole (out of 6700), and pyrimidine (out of 4500)."
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Vinylpyridines engage in highly branch-selective hydroformylation: Settambolo, R.; Pucci, S.; Bertozzi, S.; Lazzaroni, R. J. Organomet. Chem. 1995, 489, C50.
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Vinylpyridines engage in highly branch-selective hydroformylation: Settambolo, R.; Pucci, S.; Bertozzi, S.; Lazzaroni, R. J. Organomet. Chem. 1995, 489, C50.
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For Heck reactions of 2-vinylpyridine, see: (a) Kasahara, A.; Izumi, T.; Takeda, T.; Imamura, H. Bull. Chem. Soc. Jpn. 1974, 47, 183.
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For ruthenium catalyzed cross-metathesis reactions of vinylpyridine, see: (a) Chatterjee, A. K.; Toste, F. D.; Choi, T.-L.; Grubbs, R. H. Adv. Synth. Catal. 2002, 344, 634.
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(b) See also: Kokubo, K.; Miura, M.; Nomura, M. Organometallics 1995, 14, 4521.
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For hydrogen-mediated reductive aldol addition, see: a
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For hydrogen-mediated reductive aldol addition, see: (a) Jang, H. Y.; Huddleston, R. R.; Krische, M. J. J. Am. Chem. Soc. 2002, 124, 15156.
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For hydrogen-mediated reductive Mannich addition, see: a
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For hydrogen-mediated reductive Mannich addition, see: (a) Garner, S. A.; Krische, M. J. J. Org. Chem. 2007, 72, 5843.
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For tri-2-furylphosphine and triphenylarsine effects in metal catalyzed reactions, see: a
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For tri-2-furylphosphine and triphenylarsine effects in metal catalyzed reactions, see: (a) Farina, V.; Krishnan, B. J. Am. Chem. Soc. 1991, 113, 9585.
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52449114446
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In the rhodium catalyzed hydrogenative coupling of vinyl ketones to aldehydes and imines refs 12e-h, 13, Fur3P enforces high levels of syndiastereoselectivity. Given the structural homology of vinyl ketones and 2-vinyl azines, it is not surprising that analogous ligand effects are observed
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3P enforces high levels of syndiastereoselectivity. Given the structural homology of vinyl ketones and 2-vinyl azines, it is not surprising that analogous ligand effects are observed.
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41
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52449094316
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Coupling of 2,3-diphenyl-5-vinylpyrazine to imine 2f under standard conditions provides the branched adduct in 35% yield and 5:1 dr.
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Coupling of 2,3-diphenyl-5-vinylpyrazine to imine 2f under standard conditions provides the branched adduct in 35% yield and 5:1 dr.
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42
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84987318467
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The stoichiometric reaction of isolated rhodacyclopentadienes with elemental hydrogen delivers the product of hydrogenolysis: Müller, E, Thomas, R, Zountsas, G. Liebigs Ann. Chem. 1972, 758, 16
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The stoichiometric reaction of isolated rhodacyclopentadienes with elemental hydrogen delivers the product of hydrogenolysis: Müller, E.; Thomas, R.; Zountsas, G. Liebigs Ann. Chem. 1972, 758, 16.
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