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Denmark, S.E.1
Hurd, A.R.2
Sacha, H.J.3
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74
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13044291934
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note
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3N] and HPLC analysis of this sulfonamide (Chiralcel AS-II, 9:1 n-hexane-i-PrOH).
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-
-
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75
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13044270260
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-
note
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35
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-
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76
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13044280135
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note
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2,3 enoxysilane in moderate yield. Reaction of this intermediate with MeLi in ether-THF at 0°C to generate the corrresponding lithium enolate and trapping with N-phenyltriflimide gave 56 in 70% yield. The efficiency of this latter conversion establishes that the lithium enolate precursor of 56 is stable for 50 min at 0°C in ether-THF.
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-
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77
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0002493193
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Craig, D.; McCague, R.; Potter, G. A.; Williams, M. R. V. Synlett 1998, 58.
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(1998)
Synlett
, pp. 58
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Craig, D.1
McCague, R.2
Potter, G.A.3
Williams, M.R.V.4
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78
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13044272241
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note
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Intramolecularity was critical to the success of the cycloaddition, since reaction of β-silyl acrylate 52 with 58 failed to yield cycloaddition products at temperatures as high as 165°C.
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-
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79
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13044249761
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Attempts to oxidize the C-Si bond in these disiloxanes failed
-
Attempts to oxidize the C-Si bond in these disiloxanes failed.
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-
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80
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0026529460
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We also attempted a one-step cleavage of the N-Si and C-Si bonds by reaction with CsF or TAS-F in DMF at elevated temperature. Such a transformation is precendented with oxasilacyclopentanes: Hale, M. R., Hoveyda, A. H. J. Org. Chem. 1992, 57, 1643.
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(1992)
J. Org. Chem.
, vol.57
, pp. 1643
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Hale, M.R.1
Hoveyda, A.H.2
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81
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13044276878
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note
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The authors have deposited atomic coordinates for 68 with the Cambridge Crystallographic Data Centre. The coordinates can be obtained, on request, from the Director, Cambridge Crystallographic Data Centre, 23 Union Road, Cambridge, CB2 1EZ, UK.
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-
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82
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5244370033
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2 at atmospheric pressure. Other general experimental details have been described: Deng, W.; Overman, L. E. J. Am. Chem. Soc. 1994, 116, 11241.
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(1996)
Organometallics
, vol.15
, pp. 1518
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Pangborn, A.B.1
Giardello, M.A.2
Grubbs, R.H.3
Rosen, R.K.4
Timmers, F.J.5
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83
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0028556311
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2 at atmospheric pressure. Other general experimental details have been described: Deng, W.; Overman, L. E. J. Am. Chem. Soc. 1994, 116, 11241.
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(1994)
J. Am. Chem. Soc.
, vol.116
, pp. 11241
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Deng, W.1
Overman, L.E.2
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84
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13044251120
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note
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An improved preparation of this known compound is described in the Supporting Information.
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