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5
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0030955436
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For reviews on carbocyclic nucleoside chemistry, see: (a) Borthwick, A. D.; Biggadike, K. Tetrahedron 1992, 48, 571. (b) Agrofoglio, L.; Suhas, E.; Farese, A.; Condom, R.; Challand, S. R.; Earl, R. A.; Guedj, R. Tetrahedron 1994, 50, 10611. (c) Mansour, T. S.; Storer, R. Curr. Pharm. Des. 1997, 3, 227. (d) Marquez, V. E. In Advances in Antiviral Drug Design; De Clercq, E., Ed.; JAI Press Inc.: Greenwich, CT, 1996; Vol. 2, p 89.
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77956854664
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0028114072
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0030058156
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0032546129
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For a review on acylnitroso hetero-Diels-Alder reactions, see: Vogt, P. F.; Miller, M. J. Tetrahedron 1998, 54, 1317.
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Vogt, P.F.1
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1542714994
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ChiroScreen-TE, Altus Biologies, Inc
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ChiroScreen-TE, Altus Biologies, Inc.
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31
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0010640653
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32
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20644469267
-
-
The E value was calculated with the program "Selectivity" available at www-orgc.tu-graz.ac.at/programs/enantio/mac/selectiv.hqx. See: (a) Chen, C.-S.; Fujimoto, Y.; Girdaukas, G.; Sih, C. J. J. Am. Chem. Soc. 1982, 104, 7294. (b) Chen, C. S.; Wu, S.-H.; Girdaukas, G.; Sih, C. J. J. Am. Chem. Soc. 1987, 109, 2812.
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Sih, C.J.4
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33
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33845282987
-
-
The E value was calculated with the program "Selectivity" available at www-orgc.tu-graz.ac.at/programs/enantio/mac/selectiv.hqx. See: (a) Chen, C.-S.; Fujimoto, Y.; Girdaukas, G.; Sih, C. J. J. Am. Chem. Soc. 1982, 104, 7294. (b) Chen, C. S.; Wu, S.-H.; Girdaukas, G.; Sih, C. J. J. Am. Chem. Soc. 1987, 109, 2812.
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Chen, C.S.1
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Sih, C.J.4
-
34
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0030914234
-
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3). See: Vogt, P. F.; Hansel, J.-G.; Miller, M. J. Tetrahedron Lett. 1997, 38, 2803.
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Vogt, P.F.1
Hansel, J.-G.2
Miller, M.J.3
-
35
-
-
1542609914
-
-
note
-
(b) Synthesis of (-)-7b from (-)-7d (Scheme 6) gave a standard for determination of the configuration of acetate (-)-7b derived from enzymatic resolution of (±)-6b. Methyl carbamate (+)-6c obtained from enzymatic hydrolysis was transformed to acetate (-)-7b by the synthetic route shown in Scheme 6 in order to determine its absolute configuration.
-
-
-
-
36
-
-
1542505335
-
-
Chirazyme Lipases and Esterases Screening Kit; Boehringer Mannheim
-
Chirazyme Lipases and Esterases Screening Kit; Boehringer Mannheim.
-
-
-
-
37
-
-
4243794106
-
-
For a review on enzymatic approaches to enantiomerically pure chiral building blocks, see: (a) Santaniello, E.; Ferraboschi, P.; Grisenti, P.; Manzocchi, A. Chem. Rev. 1992, 92, 1071. (b) Boland, W.; Frobl, C.; Lorenz, M. Synthesis 1991, 1049.
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Santaniello, E.1
Ferraboschi, P.2
Grisenti, P.3
Manzocchi, A.4
-
38
-
-
4243794106
-
-
For a review on enzymatic approaches to enantiomerically pure chiral building blocks, see: (a) Santaniello, E.; Ferraboschi, P.; Grisenti, P.; Manzocchi, A. Chem. Rev. 1992, 92, 1071. (b) Boland, W.; Frobl, C.; Lorenz, M. Synthesis 1991, 1049.
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Synthesis
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Boland, W.1
Frobl, C.2
Lorenz, M.3
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40
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0025043968
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(a) Hsu, S. H.; Wu, S. S.; Wang, Y. F. Tetrahedron Lett. 1990, 31, 6403.
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85027871817
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Deardorff, D.R.1
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Craney, C.L.3
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43
-
-
1542609913
-
-
note
-
Acetate (±)-7a was subjected to EEAC in aqueous buffer; apparently, insolubility of the substrate prevented hydrolysis from occurring even after addition of 10% MeOH or 10% EtOH (4 days reaction time).
-
-
-
-
46
-
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0029097051
-
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Muxworthy, J. P.; Wilkinson, J. A.; Procter, G. Tetrahedron Lett. 1995, 36, 7539.
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47
-
-
0030008191
-
-
2Ts). We also found that 9 underwent successful Pd(0) coupling with dimethyl malonate (90% yield) and methyl nitroacetate (69% yield) and in one case underwent coupling with Pd(II) (dimethyl malonate, 65% yield). Adenine coupling, however, was not successful under Pd(0)-coupling conditions, possibly indicative of the equilibrium between the closed and open forms of the urethane. This equilibrium has been previously reported with lactone substrates: Aggarwal, V. K.; Monteiro, N.; Tarver, G. J.; Lindell, S. D. J. Org. Chem. 1996, 61, 1192.
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J. Org. Chem.
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Lindell, S.D.4
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52
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4344682349
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Kirby, G. W.; McGuigan, H.; Mackinnon, J. W. M.; McLean, D.; Sharma, R. P. J. Chem. Soc., Perkin Trans, 1 1985, 1437.
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Sharma, R.P.5
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53
-
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0001126454
-
-
and references therein
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Keck, G.E.1
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37049110359
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55
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0001543422
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Ranganathan, D.; Ranganathan, S.; Rao, C. B.; Raman, K. Tetrahedron 1981, 37, 629.
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Ranganathan, D.1
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56
-
-
1542505334
-
-
note
-
The buffer was prepared by dissolution of 100 g of sodium dihydrogen phosphate monohydrate into 200 mL of distilled water. The pH of the solution was adjusted to 6.9 with the addition of concentrated sodium hydroxide solution, and then the solution was diluted to a final volume of 500 mL.
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