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See, for instance: A. Iraqui, I. Wataru, Chem. Mater. 2004, 16, 442-448.
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37049081811
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For transition metals-catalyzed reductive cyclizations using CO, see: a
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For transition metals-catalyzed reductive cyclizations using CO, see: a) C Crotti, S. Cenini, B. Rindone, S. Tollari, F. Demartin, J.Chem. Soc., Chem. Commun. 1986, 784-786;
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T. L. Scott, B. C. G. Söderberg, Tetrahedron 2003, 59, 6323-6332, and references cited therein;
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c) T. L. Scott, B. C. G. Söderberg, Tetrahedron 2003, 59, 6323-6332, and references cited therein;
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10
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I. W Davies, I H. Smitrovich, R. Sidler, C. Qu, V. Gresham, C. Bazaral, Tetrahedron 2005, 67, 6425-6437, and references cited therein;
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d) I. W Davies, I H. Smitrovich, R. Sidler, C. Qu, V. Gresham, C. Bazaral, Tetrahedron 2005, 67, 6425-6437, and references cited therein;
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33747092660
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for a recent review, see
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e) for a recent review, see: F. Ragaini, S. Cenini, E. Gallo, A. Caselli, S. Fantauzzi, Curr. Og. Chem. 2006, 70, 1479-1510;
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Ragaini, F.1
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0001270911
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on the other hand, disilanes are also able to deoxygenate aryl nitro compounds, see: F.-P. Tsui, T. M. Vogel, G. Zon, J.Org. Chem. 1975, 40, 761-766.
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f) on the other hand, disilanes are also able to deoxygenate aryl nitro compounds, see: F.-P. Tsui, T. M. Vogel, G. Zon, J.Org. Chem. 1975, 40, 761-766.
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14
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37049054527
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b) J. I. G. Cadogan, M. CameronWood, R. K. Mackie, R. J. G. Searle, J.Chem. Soc. 1965, 4831-4837;
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31344460316
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for a recent example in synthesis, see
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c) for a recent example in synthesis, see: T.-L. Ho, S.-Y. Hsieh, Helv. Chim. Acta 2006, 89, 111-116.
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Ho, T.-L.1
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0029020553
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for an example in synthesis, see
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c) for an example in synthesis, see: A. S. Cotterill, C. J. Moody, J. R. A. Roffey, Tetrahedron 1995, 57, 7223-7230.
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0021680957
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2O (180°c) for 2-acylindoles, gave rise to moderate yields of these functionalized indoles; see: a) R. S. Mali, V. J. Yadav, Synthesis 1984, 862-865;
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2O (180°c) for 2-acylindoles, gave rise to moderate yields of these functionalized indoles; see: a) R. S. Mali, V. J. Yadav, Synthesis 1984, 862-865;
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23
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34547199197
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37049131643
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A nitrene precursor or nitrenoid cannot be excluded; see: a
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b) R. J. Sundberg, H. F. Russell, W. V. Ligon, Jr., L. S. Lin, J. Org. Chem. 1972, 37, 719-724;
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37049070960
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3 in moderate yields and in collidine at reflux, see: I. Hughes, W. P. Nolan, R. A. Raphael, J. Chem. Soc., Perkin Trans. 1 1990, 2475-2480.
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3 in moderate yields and in collidine at reflux, see: I. Hughes, W. P. Nolan, R. A. Raphael, J. Chem. Soc., Perkin Trans. 1 1990, 2475-2480.
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for recent synthetic applications, see: a
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for recent synthetic applications, see: a) A. C. Fernandes, R. Fernandes, C. C. Romao, B. Royo, Chem. Commun. 2005, 213-214;
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34547231806
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[13]
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[13]
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40
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0000345918
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3 in mild conditions: F. J. Arnáiz, R. Aguado, J. M. Martínez-Ilarduya, Polyhedron 1994, 13, 3257-3259.
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3 in mild conditions: F. J. Arnáiz, R. Aguado, J. M. Martínez-Ilarduya, Polyhedron 1994, 13, 3257-3259.
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41
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[13]
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[13]
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a) F. J. Arnáiz, R. Aguado, M. R. Pedrosa, A. de Cian, I Fischer, Polyhedron 2000, 19, 2141-2147;
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b) F. E. Kühn, A. M. Santos, A. D. Lopes, I. S. Gonçalves, J. E. Rodrígues-Borges, M. Pillinger, C. C. Romao, J. Organomet. Chem. 2001, 621, 207-217.
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Sundberg, R.J.1
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45
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34547222178
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The formation of the intermediates o-nitrocinnamates or o-nitrochalcones was monitored by GC-MS and usually takes place in 1-2 h
-
The formation of the intermediates o-nitrocinnamates or o-nitrochalcones was monitored by GC-MS and usually takes place in 1-2 h.
-
-
-
-
46
-
-
34547187851
-
-
It was added in two portions: 5 mol% of catalyst at the beginning and further addition of another 5 mol% of catalyst after 12 h
-
It was added in two portions: 5 mol% of catalyst at the beginning and further addition of another 5 mol% of catalyst after 12 h.
-
-
-
-
47
-
-
34547189377
-
-
Although we have not an explanation for the lower yields obtained for 5-chloroindoles 6g and 6m, we speculate that it could be due to a decreased efficacy of the reductive deoxygenation [via electrophilic attack by the oxomolybdenum(IV)complex] of the nitro group in these cases
-
Although we have not an explanation for the lower yields obtained for 5-chloroindoles 6g and 6m, we speculate that it could be due to a decreased efficacy of the reductive deoxygenation [via electrophilic attack by the oxomolybdenum(IV)complex] of the nitro group in these cases.
-
-
-
-
48
-
-
33845281614
-
-
The tendency of oxomolybdenum(IV) and dioxomolybdenum(VI) to comproportionate is well documented: R. H. Holm, Chem. Rev. 1987, 57, 1401-1449.
-
The tendency of oxomolybdenum(IV) and dioxomolybdenum(VI) to comproportionate is well documented: R. H. Holm, Chem. Rev. 1987, 57, 1401-1449.
-
-
-
-
50
-
-
37049114550
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R. J. Butcher, H. P. Gunz, R. G. A. R. Maclagan, H. Kipton, J. Powell, C. J. Wilkins, Y. S. Hian, J. Chem. Soc., Dalton Trans. 1975, 1223-1227.
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Wilkins, C.J.6
Hian, Y.S.7
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