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note
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Moreover, the intramolecular addition of an organometallic across a triple bond is known to be a syn process. See ref. 5.
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30
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0344781101
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note
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With Red-A1, the cyclic and linear reduced products are observed in 22 and 29% respectively.
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4) and then the solvent was evaporated to provide the crude product. After purification by chromatography on silica gel (10% EtOAc in hexanes), 421 mg (90%) of the title compound was obtained
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4) and then the solvent was evaporated to provide the crude product. After purification by chromatography on silica gel (10% EtOAc in hexanes), 421 mg (90%) of the title compound was obtained
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34
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note
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All our attempts to form the six-membered ring as well as to promote the isomerization across a double bond failed.
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