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33750492874
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33750476919
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For reviews of enyne metathesis, see:
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31
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33750456898
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For leading references on domino enyne RCM/CM reactions, see:
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39
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0344309090
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27144526502
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33750431639
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note
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1H NMR and integrating diagnostic signals for the two stereoisomers.
-
-
-
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53
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33750453675
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note
-
1H NMR spectrum of the intermediate 13 derived from 9a with that of a sample of 13 independently synthesized from ester 24 as outlined in Schemes 7 and 8.
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59
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4644293034
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Use of chiral ligands has been reported to induce diastereoselectivity in nickel-catalyzed conjugate additions of alkynyl organoaluminum species, see:
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Use of chiral ligands has been reported to induce diastereoselectivity in nickel-catalyzed conjugate additions of alkynyl organoaluminum species, see:. Kwak Y.-S., and Corey E.J. Org. Lett. 6 (2004) 3385-3388
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3 deprotection of a silyl alkyne, see:
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33750471865
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note
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1H NMR and mass spectrometry.
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67
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11144313032
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For other examples of CM with methyl vinyl ketone, see: and references cited therein
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For other examples of CM with methyl vinyl ketone, see:. Dewi P., Randl S., and Blechert S. Tetrahedron Lett. 46 (2005) 577-580 and references cited therein
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33750480457
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note
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The TMS-protected alkyne corresponding to 27 was also prepared, but the derived nitrile was volatile and difficult to obtain in reasonable yield. However, sufficient material with the TMS-protected alkyne was carried forward to confirm the stereochemistry of the conjugate addition reactions, see Ref. 24.
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33750452961
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note
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2b
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