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The carbonates were obtained from the corresponding Baylis-Hillman adducts in good yields by reaction with methylchloroformate/potassium carbonate.
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35
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0142243618
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note
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This diastereomeric ratio reflects the ratio of (R,R)-31 and meso-31. No (S,S)-31 was formed.
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39
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0142243616
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Bromination of acetate 32, the free phenol 33, or the corresponding TBDMS-ether were unselective.
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0033856957
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0142150496
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0142150493
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The free alcohol 53 or the TBDMS-protected derivative led to inferior results in the cross metathesis.
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59
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