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1
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33750309194
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Trost, B.M.1
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For leading reviews on MCR, see: a) B. M. Trost, Angew. Chem., Int. Ed. Engl., 34, 259 (1995). b) P. Eilbracht and A. Schimdt, Chem. Rev., 99, 3329 (1999). c) L. F. Tietze, Chem. Rev., 96, 137 (1996). d) P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev., 96, 195 (1996). e) T. L. Ho, "Tandem Reactions," John Wiley & Sons, New York (1992). f) A. Domling and I. Ugi, Angew. Chem., Int. Ed. Engl., 32, 563 (1993). g) R. A. Bunce, Tetrahedron, 48, 13103 (1995). h) I. Ugi, Pure Appl. Chem., 77, 187 (2001).
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For leading reviews on MCR, see: a) B. M. Trost, Angew. Chem., Int. Ed. Engl., 34, 259 (1995). b) P. Eilbracht and A. Schimdt, Chem. Rev., 99, 3329 (1999). c) L. F. Tietze, Chem. Rev., 96, 137 (1996). d) P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev., 96, 195 (1996). e) T. L. Ho, "Tandem Reactions," John Wiley & Sons, New York (1992). f) A. Domling and I. Ugi, Angew. Chem., Int. Ed. Engl., 32, 563 (1993). g) R. A. Bunce, Tetrahedron, 48, 13103 (1995). h) I. Ugi, Pure Appl. Chem., 77, 187 (2001).
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For leading reviews on MCR, see: a) B. M. Trost, Angew. Chem., Int. Ed. Engl., 34, 259 (1995). b) P. Eilbracht and A. Schimdt, Chem. Rev., 99, 3329 (1999). c) L. F. Tietze, Chem. Rev., 96, 137 (1996). d) P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev., 96, 195 (1996). e) T. L. Ho, "Tandem Reactions," John Wiley & Sons, New York (1992). f) A. Domling and I. Ugi, Angew. Chem., Int. Ed. Engl., 32, 563 (1993). g) R. A. Bunce, Tetrahedron, 48, 13103 (1995). h) I. Ugi, Pure Appl. Chem., 77, 187 (2001).
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For leading reviews on MCR, see: a) B. M. Trost, Angew. Chem., Int. Ed. Engl., 34, 259 (1995). b) P. Eilbracht and A. Schimdt, Chem. Rev., 99, 3329 (1999). c) L. F. Tietze, Chem. Rev., 96, 137 (1996). d) P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev., 96, 195 (1996). e) T. L. Ho, "Tandem Reactions," John Wiley & Sons, New York (1992). f) A. Domling and I. Ugi, Angew. Chem., Int. Ed. Engl., 32, 563 (1993). g) R. A. Bunce, Tetrahedron, 48, 13103 (1995). h) I. Ugi, Pure Appl. Chem., 77, 187 (2001).
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Ho, T.L.1
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6
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For leading reviews on MCR, see: a) B. M. Trost, Angew. Chem., Int. Ed. Engl., 34, 259 (1995). b) P. Eilbracht and A. Schimdt, Chem. Rev., 99, 3329 (1999). c) L. F. Tietze, Chem. Rev., 96, 137 (1996). d) P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev., 96, 195 (1996). e) T. L. Ho, "Tandem Reactions," John Wiley & Sons, New York (1992). f) A. Domling and I. Ugi, Angew. Chem., Int. Ed. Engl., 32, 563 (1993). g) R. A. Bunce, Tetrahedron, 48, 13103 (1995). h) I. Ugi, Pure Appl. Chem., 77, 187 (2001).
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8844273567
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note
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3: C, 80.21; H, 5.85%. found: C, 80.36; H, 6.13%.
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25
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8844272801
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note
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According to a referee, regioselective formation of benzopyrans via 2 + 4 addition of o-QM with the enol of active methylene substrates, followed by dehydration is also possible.
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-
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26
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8844256378
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note
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Elemental analysis and spectral data for products cited in the Table 1 are given in the supplimentary information. In some cases (Entries 1-3), low polar product(s) formed in minor amounts have not been characterised.
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27
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8844267819
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note
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The X-ray crystallographic data of 18 have been submitted to the Cambridge data-base as a file: CCDC 230653.
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28
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0000554446
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0000390816
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Pyranyl heterocycles, see a) R. P. Hsung, J. Org. Chem., 62, 7904 (1997). b) L.-L. Wei, R. P. Hsungg, H. Xiong, J. A. Mulder, and N. T. Nkansah, Org. Lett., 1, 2145 (1999). c) R. P. Hsung, Heterocycles, 48, 421 (1998).
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