Orienting Effect of the Cage Addends: The Case of Nucleophilic Cyclopropanation of C 2 ‐C 70 (CF 3 ) 8
C 2 ‐C 70 (CF 3 ) 8 was found to be a very promising substrate in the Bingel and the Bingel–Hirsch reactions combining perfect regioselectivity with much higher reactivity compared to its analogs. The reactions with diethyl malonate yield a single isomer of the monoadduct C 70 (CF 3 ) 8 [C(CO 2 Et)...
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Veröffentlicht in: | Chemistry, an Asian journal an Asian journal, 2015-06, Vol.10 (6), p.1370-1378 |
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Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | C
2
‐C
70
(CF
3
)
8
was found to be a very promising substrate in the Bingel and the Bingel–Hirsch reactions combining perfect regioselectivity with much higher reactivity compared to its analogs. The reactions with diethyl malonate yield a single isomer of the monoadduct C
70
(CF
3
)
8
[C(CO
2
Et)
2
] and a single
C
2
‐symmetrical bisadduct C
70
(CF
3
)
8
[C(CO
2
Et)
2
]
2
. The Bingel–Hirsch variation is particularly interesting in that it additionally affords, in a similar regioselective manner, the unexpected alkylated derivatives C
70
(CF
3
)
8
[CH(CO
2
Et)
2
]H and C
70
(CF
3
)
8
[C(CO
2
Et)
2
][CH(CO
2
Et)
2
]H. The novel compounds have been isolated and structurally characterized by means of
1
H and
19
F NMR spectroscopy as well as single‐crystal X‐ray diffraction. The mechanistic and regiochemical aspects of the reaction are explained with the aid of DFT calculations. |
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ISSN: | 1861-4728 1861-471X |
DOI: | 10.1002/asia.201500079 |