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Recently, Rh(II)-catalyzed indole formation from azidocinnamates was reported, see: Stokes, B. J.; Dong, H.; Lesile, B. E.; Pumphrey, A. L.; Driver, T. G. J. Am. Chem. Soc. 2007, 129, 7500.
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38749128643
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We examined the following additives; AcOH, PPTS, TfOH, MgBr2, Mg(OTf)2, K2CO3, CuCO3, DABCO, H2O, and MS 4Å
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2O, and MS 4Å.
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39
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38749153136
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The structure of 4a was secured by X-ray crystallographic analysis. CCDC-295066 contains the supplementary crystallographic data for compound 4a. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Center, 12 Union Road, Cambridge, CB21 EZ, UK; fax: (+44)1223-336-033; or e-mail deposit@cdc.cam.ac.uk). See Supporting Information.
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The structure of 4a was secured by X-ray crystallographic analysis. CCDC-295066 contains the supplementary crystallographic data for compound 4a. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Center, 12 Union Road, Cambridge, CB21 EZ, UK; fax: (+44)1223-336-033; or e-mail deposit@cdc.cam.ac.uk). See Supporting Information.
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38749106496
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3CN at 40-60°C.
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3CN at 40-60°C.
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42
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