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0031314569
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A nickeladihydropyran seems a likely intermediate, although authors did not mention it. Ichiyanagi, T.; Kuniyama, S.; Shimizu, M.; Fujisawa, T. Chem. Lett. 1997, 1149-1150.
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20
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33646460267
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note
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2: C. 69.30; H. 8.93. Found: C, 69.23: H, 8.10. Stereochemistry of 3b and 3b′ was determined by NOE measurements.
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-
-
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21
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33646456197
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note
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By the use of 10 mol % of 2b as a catalyst, cyclopropyl phenyl ketone underwent the cycloaddition only slowly to give a mixture of 3b and 3b′ at 100 °C (1.5 h 7%. 16 h 91% as a mixture).
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-
-
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22
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33646438833
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note
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2: C, 72.15; H, 10.00. Found: C, 71.57; H. 9.79.
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-
-
-
23
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33646450423
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note
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2: C, 69.30; H, 8.93. Found: C, 69.31; H, 9.00.
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-
-
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24
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0035809288
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(a) Amarasinghe, K. K. D.; Chowdhury, S. K.; Heeg, M. J.; Montgomery. J. Organometallics 2001, 20, 370-371.
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Montgomery, J.4
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25
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0038300851
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(b) Campora, J.; Maya, C. M.; Palma, P.; Carmona, E.; Graiff, C.; Tiripicchio, A. Chem. Commun. 2003, 1742-1743.
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Carmona, E.4
Graiff, C.5
Tiripicchio, A.6
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26
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33646464380
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-
note
-
We assume the O-bridging dimer structure for 6 tentatively, although a trimer or higher order aggregated structures are possible.
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27
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1542465603
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Salisova, M.; Toma, S.; Solcaniova, E. J. Organomet. Chem. 1987, 327, 77-84.
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Salisova, M.1
Toma, S.2
Solcaniova, E.3
-
28
-
-
33646442198
-
-
note
-
2P: C, 69.61; H, 9.03. Found: C, 68.61; H, 8.91. 8 is depicted tentatively as a complex having the stereochemistry corresponding to the major product 4b.
-
-
-
-
29
-
-
33646442771
-
-
note
-
The intermediate C may dimerize to the catalytically much less active 2 if the rate of conversion of C to D becomes comparably small.
-
-
-
-
30
-
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33646445028
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note
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6.
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