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0343992143
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note
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The enhanced reactivity of alkoxycarbonylenynes in the cross-benzannulation was reported. See: ref 6.
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10
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0343120087
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note
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We monitored these reactions by TLC and quenched the reaction when the starting material disappeared. Therefore, the results described in Tables 1 and 2 would reflect the difference of the reactivity of the enynes to some extent.
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12
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0034007402
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0342685815
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note
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The rate of the reaction may also be controlled by the steric effect. The lower yields of the products in the reaction of (E)-enynes may be explained in terms of the formation of polymeric compounds.
-
-
-
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15
-
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0343555995
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note
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Exclusive hydrogen migration from E-position of conjugated enynes has been reported in the cross-benzannulation reaction. See: ref 6a. Formula Represented.
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0343555993
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note
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Values of n-perfluoropropyl group.
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18
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0343555994
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note
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Though the C-2 carbon is most activated by the field effect of the electron-withdrawing group attached to the C-2 position (Figure 1 (a), no intermolecular C-C bond between C-2 carbons was formed in the zipper annulation.
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