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1
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ed. A . Togni and R. L. Halterman, Wiley-VCH, New York
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Metallocenes, ed., A. Togni, and, R. L. Halterman, Wiley-VCH, New York, 1998
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(1998)
Metallocenes
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5
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0035907085
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-
For selected recent examples of cyclopentadiene synthesis, see
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For selected recent examples of cyclopentadiene synthesis, see: Z. Xi Q. Song J. Chen H. Guan P. Li Angew. Chem., Int. Ed. 2001 40 1913
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Angew. Chem., Int. Ed.
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Xi, Z.1
Song, Q.2
Chen, J.3
Guan, H.4
Li, P.5
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13
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20444494998
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For reviews on Nazarov rections, see
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For reviews on Nazarov rections, see: H. Pellissier Tetrahedron 2005 61 6479
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(2005)
Tetrahedron
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Pellissier, H.1
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16
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24744438218
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For recent examples of Nazarov reactions, see
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For recent examples of Nazarov reactions, see: F. Dhoro M. A. Tius J. Am. Chem. Soc. 2005 127 12472
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J. Am. Chem. Soc.
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Dhoro, F.1
Tius, M.A.2
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17
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27144484967
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S. Giese, Jr. R. D. Mazzola C. M. Amann A. M. Arif F. G. West Angew. Chem., Int. Ed. 2005 44 6546
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Giese Jr., S.1
Mazzola, R.D.2
Amann, C.M.3
Arif, A.M.4
West, F.G.5
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37
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0001354153
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ed. C. H. Heathcock, Pergamon Press, New York
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O. Meth-Cohn and S. P. Stanforth, in Comprehensive Organic Synthesis, ed., C. H. Heathcock, Pergamon Press, New York, 1991, vol. 2, p. 777
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Comprehensive Organic Synthesis
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Meth-Cohn, O.1
Stanforth, S.P.2
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40
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20444408447
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Compound 2a can be considered as a potential cyclopentadienone, for a discussion of the properties and reactivity of cyclopentadienones, see: C. Chen C. Xi Y. Jiang X. Hong J. Am. Chem. Soc. 2005 127 8024
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J. Am. Chem. Soc.
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Chen, C.1
Xi, C.2
Jiang, Y.3
Hong, X.4
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42
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-
67650376993
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-
2Et or CONHAr under Vilsmeier conditions were found to afford δ-lactones and δ-lactams, respectively. See
-
2Et or CONHAr under Vilsmeier conditions were found to afford δ-lactones and δ-lactams, respectively. See: J. Liu M. Wang F. Han Y. Liu Q. Liu J. Org. Chem. 2009 74 5090
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J. Org. Chem.
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, pp. 5090
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Liu, J.1
Wang, M.2
Han, F.3
Liu, Y.4
Liu, Q.5
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43
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77949633049
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-
Note
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2 = 0.1416 (I > 2σ(I))
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-
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-
44
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77949616548
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Note
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3 (2.5 equiv) in DMF at ambient conditions for 1.5 h. For experimental details, see ESI.
-
-
-
-
46
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57349170350
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For details, please see ESI. As a comparison, no reaction was found when 1a (1.0 mmol) was treated with either concentrated HCl (3.0 equiv) or dry HCl gas (bubbled into the reaction mixture) in 5.0 mL of DMF at 90 °C for 3.0 h. These results provided further support for the proposed mechanism in Scheme 3 For selected recent examples, see
-
For details, please see ESI. As a comparison, no reaction was found when 1a (1.0 mmol) was treated with either concentrated HCl (3.0 equiv) or dry HCl gas (bubbled into the reaction mixture) in 5.0 mL of DMF at 90 °C for 3.0 h. These results provided further support for the proposed mechanism in Scheme 3 For selected recent examples, see: J. Hudon T. A. Cernak J. A. Ashenhurst J. L. Gleason Angew. Chem., Int. Ed. 2008 47 8885
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(2008)
Angew. Chem., Int. Ed.
, vol.47
, pp. 8885
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-
Hudon, J.1
Cernak, T.A.2
Ashenhurst, J.A.3
Gleason, J.L.4
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