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84908080991
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For example, the procedure reported in ref 8a was cumbersome to run and the yields obtained in our lab were not as high as quoted.
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21
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84908080990
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note
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It is not recommended to use propargyl bromide on large scale due to safety concerns.
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22
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84908080989
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note
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The addition mode has been studied in-depth, but its mechanism to suppress the formation of byproducts remains unclear.
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23
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84908080988
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note
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Alternatively, the inorganic salts could be removed by filtration.
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24
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84908080987
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note
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Preliminary results showed that Au-catalyzed cyclization led to an undesired 5-exo dig cyclization/isomerization.
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29
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84908080986
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note
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2, no desired product was observed.
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0000995951
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84908080985
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note
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9
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32
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84908080984
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note
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Overoxidation of 6 was suppressed at 0 ° C.
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