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14
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62049083619
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For reviews on cycloisomerizations, see
-
For reviews on cycloisomerizations, see:
-
-
-
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18
-
-
62049083936
-
-
Intramolecular cyclization of diazo compounds has also frequently been used to access bicyclo[3.1.0] and [4.1.0] ring systems. For examples, see:
-
Intramolecular cyclization of diazo compounds has also frequently been used to access bicyclo[3.1.0] and [4.1.0] ring systems. For examples, see:
-
-
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20
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0001080522
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Doyle M.P., Austin R.E., Bailey A.S., Dwyer M.P., Dyatkin A.B., Kalinin A.V., Kwan M.Y., Liras S., Oalmann C.J., Pieters R.J., Protopopova M.N., Raab C.E., Roos G.H.P., Zhou Q., and Martin S.F. J. Am. Chem. Soc. 117 (1995) 5763
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23
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62049085772
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For examples, see
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For examples, see:
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30
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33847276112
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Marco-Martínez J., Lòpez-Carrillo V., Buñuel E., Simancas R., and Cárdenas D.J. J. Am. Chem. Soc. 129 (2007) 1874
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36
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62049083230
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For a preliminary account of this work, see
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For a preliminary account of this work, see:
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42
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62049084885
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For examples, see
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For examples, see:
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37049118063
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Henry P.M., Davies M., Gerguson G., Phillips S., and Restivo R. J. Chem. Soc., Chem. Commun. (1974) 112
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For examples, see
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For examples, see:
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50
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62049085199
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For examples, see
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For examples, see:
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63
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62049085724
-
-
note
-
The olefin geometry of these side products could not be definitively determined using NOE analysis.
-
-
-
-
67
-
-
62049084528
-
-
note
-
Reductive elimination from a similar intermediate has been reported to proceed with inversion, as determined by coupling constant analysis (see Ref. 11b).
-
-
-
-
68
-
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62049085806
-
-
The olefin geometry of 39c could not be definitively determined in solution via NOE analysis; however, interestingly, the X-ray structure shows a geometry consistent with initial cis-acetoxypalladation of the alkyne. While the literature suggests that trans-acetoxypalladation should predominate under our standard reaction conditions, early studies of alkyne halo- and acetoxypalladation have shown that mixtures of trans and cis products can be formed. For examples, see:
-
The olefin geometry of 39c could not be definitively determined in solution via NOE analysis; however, interestingly, the X-ray structure shows a geometry consistent with initial cis-acetoxypalladation of the alkyne. While the literature suggests that trans-acetoxypalladation should predominate under our standard reaction conditions, early studies of alkyne halo- and acetoxypalladation have shown that mixtures of trans and cis products can be formed. For examples, see:
-
-
-
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70
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37049075309
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Zhu G., Ma S., Lu X., and Huang Q. J. Chem. Soc., Chem. Commun. (1995) 271
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73
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0001698683
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-
Further investigations are underway to understand the factors controlling cis versus trans acetoxypalladation as well as the effect that this has on the outcome of these cyclopropane-forming transformations
-
Bäckvall J.-E., Nilsson Y.I.M., and Gatti R.G.P. Organometallics 14 (1995) 4242 Further investigations are underway to understand the factors controlling cis versus trans acetoxypalladation as well as the effect that this has on the outcome of these cyclopropane-forming transformations
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Bäckvall, J.-E.1
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74
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62049083528
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note
-
Crystallographic data (excluding structure factors) for the structures in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 704193. Copies of the data can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: +44 (0) 1223 336033 or e-mail: deposit@ccdc.cam.ac.uk).
-
-
-
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75
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62049085486
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note
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Kinetics studies have shown that these reactions are zero order in oxidant. Therefore, the change in rate with electronically differentiated alkenes does not provide information about the cyclopropane-forming step of this reaction.
-
-
-
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76
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62049084100
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note
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In contrast, significant decomposition of the alkene products (β-H) was observed under these conditions. Many small peaks were observed in the GC and HPLC traces of these reactions after 8 h, suggesting that β-H decomposes to a mixture of unidentified minor products. We believe that this accounts for the poor mass balance in many of these reactions.
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