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20
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84893169025
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18644364364
-
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B3LYP/6-31G(d)
-
B3LYP/6-31G(d).
-
-
-
-
26
-
-
18644367709
-
-
note
-
exo-Attack, formation of the 2-cyanotetrahydroquinoline derivative. Simpler iminoquinone methides, as described in ref 14, are considerably more reactive toward dienophiles. The reason for the significantly reduced reactivity of Z-9 is unclear at present. Most likely, steric factors play a role.
-
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-
-
27
-
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0000309707
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(a) Smolinsky, G.; Wasserman, E.; Yager, Y. A. J. Am. Chem. Soc. 1962, 84, 3220.
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-
-
18644372572
-
-
note
-
(b) The signals at -3400 G are narrow triplets, which are assigned to aminyl/alkyl radical pairs formed by intramolecular hydrogen abstraction by the nitrene from a crown ether methylene group.
-
-
-
-
29
-
-
18644372700
-
-
note
-
+.
-
-
-
-
30
-
-
18644386458
-
-
note
-
32 must be destabilized by the electron-rich environment, or else the didehydroazepine 7 stabilized, or both.
-
-
-
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31
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0001706391
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(b) Hrovat, D. A.; Waali, E. E.; Borden, W. T. J. Am. Chem. Soc. 1992, 114, 8698.
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0001362419
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Kim, S.-J.; Hamilton, T. P.; Schaefer, H. F., III. J. Am. Chem. Soc. 1992, 114, 5349
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0033577015
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0042703203
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38
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0345828873
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(a) Maltsev, A.; Bally, T.; Tsao, M.-L.; Platz, M. S.; Kuhn, A.; Vosswinkel, M.; Wentrup, C. J. Am. Chem. Soc. 2004, 126, 237.
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39
-
-
18644367837
-
-
note
-
12 and 11 can thus be estimated as 23 kcal/mol.
-
-
-
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41
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0001019774
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Poe, R.; Schnapp, K.; Young, M. J. T.; Grayzar, J.; Platz, M. S. J. Am. Chem. Soc. 1992, 114, 5054.
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0004816627
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(a) Naito, I.; Oku, A.; Otani, N.; Fujiwara, Y.; Tanimoto, Y. J. Chem. Soc., Perkin Trans. 2 1996, 725.
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0035912402
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(b) Wang, J.-L.; Yuzawa, T.; Nigam, M.; Likhotvorik, I.; Platz, M. S. J. Phys. Chem. A 2001, 105, 3752.
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45
-
-
18644379727
-
-
note
-
(a) We cannot rule out formation of 13 from higher excited singlet states of either 1 or 2.
-
-
-
-
46
-
-
18644378425
-
-
note
-
+ resulted in cleavage of the N-O bond and convergence to a nitrene structure.
-
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-
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48
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0035890727
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Johnson, W. T. G.; Sullivan, M. B.; Cramer, C. J. Int. J. Quantum Chem. 2001, 85, 492.
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Johnson, W.T.G.1
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(a) Pol'shakov, D. A.; Tsentalovich, Yu. P.; Gritsan, N. P. Kinet. Catal. 2001, 42, 601;
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Pol'shakov, D.A.1
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51
-
-
18644364240
-
-
note
-
max = 511, 447, and 411 nm.
-
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-
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52
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1642494846
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Havlas, Z.; Kývala, M.; Michl, J. Collect. Czech. Chem. Commun. 2003, 68, 2335.
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0021155363
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-1 (Hadel, L. M.; Platz, M. S.; Scaiano, J. C. J. Am. Chem. Soc. 1984, 106, 283.)
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55
-
-
18644372045
-
-
cf. ref 17 and references therein
-
12 by diethylamine also partially accounts for our failure to isolate 5 upon photolysis of complexes of 1 in the presence of diethylamine (Stern-Volmer quenching). In addition, complexes of 5 may also simply be too unstable for isolation (cf. ref 17 and references therein).
-
-
-
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56
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1542356431
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Foresman, J. B.; Keith, T. A.; Wiberg, K. B.; Snoonian, J.; Frisch, M. J. J. Phys. Chem. 1996, 100, 16098.
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