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21
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33645400589
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-
See ref. 6 for preparation of 6i
-
See ref. 6 for preparation of 6i.
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-
-
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22
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33947469856
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Kornblum, N.; Smiley, R. A.; Blackwood, R. K.; Iffland, D. C. J. Am. Chem. Soc. 1955, 77, 6269.
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23
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33645416752
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note
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When 1 equiv of Grignard reagent was employed, O-protected compound 8 was obtained predominantly in entry 5.
-
-
-
-
24
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-
33645391498
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-
note
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4. Removal of the solvent and subsequent silica gel chromatography (heptane and EtOAc) afforded the corresponding lactam 1a in a pure form.
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-
-
-
25
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-
33645416079
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-
note
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3): δ = 20.75, 43.12, 44.90, 114.56, 118.31, 124.45, 126.75, 132.09, 137.32, 141.51, 165.88.
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