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51
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85003516734
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note
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12SiBr + Na: 946.2558).
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52
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85003737243
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note
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In a variety of model systems related to 20 and 1, the C13-H consistently resonates upfield in the (E)-isomer, whereas the N 16-H resonates downfield in this isomer: see ref. [13b].
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53
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0001694651
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L. Birkofer, E. Bierwirth, A. Ritter, Chem Ber. 1961, 94, 821. See also: M. Sakaitani, Y. Ohfune, J. Org. Chem. 1990, 55, 870.
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Sakaitani, M.1
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56
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85003560721
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note
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10Si + Na: 732.2928).
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-
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58
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85003736256
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note
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10 + H: 596.2244).
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59
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85003610567
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note
-
Model systems for the azabicyclic system of the natural products also exhibited instability when the C12-hydroxy protecting group was removed. In simple systems, deprotection of a trimethylsilyl ether was run in situ in an NMR tube because the product could not be isolated. For details, see ref. [11].
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60
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85003440407
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unpublished observations from this lab
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R. J. Perez, unpublished observations from this lab.
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Perez, R.J.1
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