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The reaction with secondary alkyl bromides led to lower yields of the annulated products
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The reaction with secondary alkyl bromides led to lower yields of the annulated products.
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52
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34250759263
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The regiochemistry of the double bond isomers was determined by COSY, HSQC, and 1D ROESY NMR spectroscopy.
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The regiochemistry of the double bond isomers was determined by COSY, HSQC, and 1D ROESY NMR spectroscopy.
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34250776473
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The configurations of (S)-7 and (R)-1 are solely based on their preparation. See the Supporting Information for details.
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The configurations of (S)-7 and (R)-1 are solely based on their preparation. See the Supporting Information for details.
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54
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34250713314
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The absolute configuration of (S)-11a is based on X-ray analysis of a p-bromobenzoate derivative (S)-16. CCDC-619350 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via http://www.ccdc.cam.ac.uk/data_request/cif. See the Supporting Information for details. The absolute configuration of 4 (Scheme 3 b) was not determined, although we propose the R configuration on the basis of the results of this mechanistic study.
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The absolute configuration of (S)-11a is based on X-ray analysis of a p-bromobenzoate derivative (S)-16. CCDC-619350 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via http://www.ccdc.cam.ac.uk/data_request/cif. See the Supporting Information for details. The absolute configuration of 4 (Scheme 3 b) was not determined, although we propose the R configuration on the basis of the results of this mechanistic study.
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55
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34250778278
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CCDC-619351 [(R)-6] and CCDC-627191 [(R)-15] contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
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CCDC-619351 [(R)-6] and CCDC-627191 [(R)-15] contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
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56
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34250735525
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On the basis of the synthesis of 7, we believe its absolute configuration to be S. We have determined by X-ray crystallography that the configuration of 11a is S, which indicates that the annulation of oxygen-containing substrates also proceeds with overall inversion
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On the basis of the synthesis of 7, we believe its absolute configuration to be S. We have determined by X-ray crystallography that the configuration of 11a is S, which indicates that the annulation of oxygen-containing substrates also proceeds with overall inversion.
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0028220832
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IV intermediates, see: a J. K. Stille, The Chemistry of the Metal-Carbon Bond, 2 (Eds.: F. R. Hartley, S. Patai), Wiley, New York, 1985, ch. 9;
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IV intermediates, see: a) J. K. Stille, The Chemistry of the Metal-Carbon Bond, Vol. 2 (Eds.: F. R. Hartley, S. Patai), Wiley, New York, 1985, ch. 9;
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see also reference [5].
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b) see also reference [5].
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68
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34250773374
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N2 versus direct insertion pathways of oxidative addition, see: J. P. Collman, L. S. L. Hegedus, Principles and Applications of Organotransition Metal Chemistry, University Science Books, Mill Valley, CA, 1980, ch. 4.
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N2 versus direct insertion pathways of oxidative addition, see: J. P. Collman, L. S. L. Hegedus, Principles and Applications of Organotransition Metal Chemistry, University Science Books, Mill Valley, CA, 1980, ch. 4.
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