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0342413036
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National Cancer Institute Developmental Therapeutics Program testing to L.E.O., dated March 12, 1998.
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0342413035
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note
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For brief reviews of synthetic work in this area, see refs 1a and 1b.
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9 see Supporting Information.
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39
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0342413029
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note
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The crambescidin numbering system is employed in the discussion of all synthetic intermediates. Proper IUPAC designations of intermediates can be found in the Experimental Section or Supporting Information.
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40
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49949128203
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0342413030
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Torsional steering as a potential control element in spirocyclization is developed more fully later in the text in the discussion of forming the spirooxepene.
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0342848000
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note
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16 A better synthesis of alcohol 37, which provides material of high enantiopurity, is shown in Scheme 7.
-
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46
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0026546535
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0342358732
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note
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3.
-
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62
-
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0342358731
-
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following paper in this issue
-
A more detailed discussion of the challenge in distinguishing C43 epimers in the crambescidin series is found in the accompanying paper: Coffey, D. S.; Overman, L. E.; Stappenbeck, F., following paper in this issue.
-
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Coffey, D.S.1
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63
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0031459058
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General experimental details have been described: Metais, E.; Overman, L. E.; Rodriguez, M. I.; Stearns, B. A. J. Org. Chem. 1997, 62, 9210-9216. Additional details are presented in Supporting Information.
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0004169871
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Hydrazoic acid was generated by the procedure reported in: Org. React. 1946, 3, 327.
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-
-
-
65
-
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0342358730
-
-
note
-
13C NMR signals of many of the methylene carbons of the hexadecanoate side chain overlap.
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-
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