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It should be noted that considerable amounts (∼15%) of tribromides of 1-phenyl- and 1-alkoxyadamantanes, such as 1,3,5-tribromo-7-phenyladamantane, 1,3,5-tribromo-7-methoxyadamantane, and 1,3,5-tribromo-7-butoxyadamantane certainly formed in the reaction mixtures using mono-substituted adamantanes, such as 8a, 9a, and 9c after the prolonged reaction (See Supplementary data)
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It should be noted that considerable amounts (∼15%) of tribromides of 1-phenyl- and 1-alkoxyadamantanes, such as 1,3,5-tribromo-7-phenyladamantane, 1,3,5-tribromo-7-methoxyadamantane, and 1,3,5-tribromo-7-butoxyadamantane certainly formed in the reaction mixtures using mono-substituted adamantanes, such as 8a, 9a, and 9c after the prolonged reaction (See Supplementary data).
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84875211734
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2. After workup, 11b could be isolated in 21% yield
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2. After workup, 11b could be isolated in 21% yield.
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84875232020
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In several cases, trace amounts of corresponding adamantanes were obtained along with the desired DHAs probably due to the reduction of 1,3-dibromoadamantanes with lithium metal
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In several cases, trace amounts of corresponding adamantanes were obtained along with the desired DHAs probably due to the reduction of 1,3-dibromoadamantanes with lithium metal.
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Ref. 2. The simultaneous introduction of two different substituents on adamantyl framework was also attained to form 1-bromo-3-ethoxyadamantane by the reaction of 1a in the presence of bromine in diethyl ether. The reaction of 1a with bromine gave a 3-bromo-1-adamantyl cation, and the cation reacted with nucleophilic diethyl ether to provide an oxonium salt. The following elimination of oxonium salt afforded 1-bromo-3-ethoxyadamantane as a major product from 1a
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Ref. 2. The simultaneous introduction of two different substituents on adamantyl framework was also attained to form 1-bromo-3-ethoxyadamantane by the reaction of 1a in the presence of bromine in diethyl ether. The reaction of 1a with bromine gave a 3-bromo-1-adamantyl cation, and the cation reacted with nucleophilic diethyl ether to provide an oxonium salt. The following elimination of oxonium salt afforded 1-bromo-3-ethoxyadamantane as a major product from 1a.
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