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0141550138
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note
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Compounds 9a-e were recrystallized from ethyl acetate, and the X-ray crystallographic analysis succeeded in confirming the stereochemistry. CCDC 203823-203827 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc-.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB21EZ, U.K.; fax (+44)1223-336-033; or deposit@ccdc.cam.ac.uk).
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35
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0141438603
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note
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2, which cannot explain the diastereoselectivity of this reaction.
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