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Alternatively, one could expect that the oxidation of the pyridyl group first occurs to give the corresponding N-oxide, which can then undergo β-elimination to give 4 and 2-hydroxypyridine or 2-methoxypyridine. However, none of these products except 4 were detected in the reaction mixture, which suggests that the mechanism involving N-oxide β-elimination is not the case
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Alternatively, one could expect that the oxidation of the pyridyl group first occurs to give the corresponding N-oxide, which can then undergo β-elimination to give 4 and 2-hydroxypyridine or 2-methoxypyridine. However, none of these products except 4 were detected in the reaction mixture, which suggests that the mechanism involving N-oxide β-elimination is not the case.
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0004133516
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Gaussian, Inc., Pittsburgh, PA
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The ab initio molecular orbital calculations were carried out at the MP2/LANL2DZ level with geometry optimization using Gaussian 98, Revision A.6.: Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Scuseria, G. E.; Robb, M. A.; Cheeseman, J. R.; Zakrzewski, V. G.; Montgomery Jr., J. A.; Stratmann, R. E.; Burant, J. C.; Dapprich, S.; Millam, J. M.; Daniels, A. D.; Kudin, K. N.; Strain, M. C.; Farkas, O.; Tomasi, J.; Barone, V.; Cossi, M.; Cammi, R.; Mennucci, B.; Pomelli, C.; Adamo, C.; Clifford, S.; Ochterski, J.; Petersson, G. A.; Ayala, P. Y.; Cui, Q.; Morokuma, K.; Malick, D. K.; Rabuck, A. D.; Raghavachari, K.; Foresman, J. B.; Cioslowski, J.; Ortiz, J. V.; Stefanov, B. B.; Liu, G.; Liashenko, A.; Piskorz, P.; Komaromi, I.; Gomperts, R.; Martin, R. L.; Fox, D. J.; Keith, T.; Al-Laham, M. A.; Peng, C. Y.; Nanayakkara, A.; Gonzalez, C.; Challacombe, M.; Gill, P. M. W.; Johnson, B.; Chen, W.; Wong, M. W.; Andres, J. L.; Gonzalez, C.; Head-Gordon, M.; Replogle, E. S.; Pople, J. A. Gaussian, Inc., Pittsburgh, PA, 1998.
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Frisch, M.J.1
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Montgomery J.A., Jr.8
Stratmann, R.E.9
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Cioslowski, J.34
Ortiz, J.V.35
Stefanov, B.B.36
Liu, G.37
Liashenko, A.38
Piskorz, P.39
Komaromi, I.40
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Martin, R.L.42
Fox, D.J.43
Keith, T.44
Al-Laham, M.A.45
Peng, C.Y.46
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Gonzalez, C.48
Challacombe, M.49
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Johnson, B.51
Chen, W.52
Wong, M.W.53
Andres, J.L.54
Gonzalez, C.55
Head-Gordon, M.56
Replogle, E.S.57
Pople, J.A.58
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