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for some other related papers, see
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0343611442
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3 at 20 °C or by silica chromatography, see: C. G. Bergstrom, S. Siegel, J. Am. Chem. Soc. 1952, 74, 145-151.
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3 at 20 °C or by silica chromatography, see: C. G. Bergstrom, S. Siegel, J. Am. Chem. Soc. 1952, 74, 145-151.
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26
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33846422831
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See Supporting Information for the details
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See Supporting Information for the details.
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27
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33846426920
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000 = 504; diffractometer: Rigaku AFC7R; residuals: R; Rw: 0.0801, 0.1698. CCDC-280669 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/ data_request/cif/
-
000 = 504; diffractometer: Rigaku AFC7R; residuals: R; Rw: 0.0801, 0.1698. CCDC-280669 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/ data_request/cif/
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28
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33846408063
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We found that product 3 was labile to decompose to some unidentified products even kept in the refrigerator which may partially resulted in the low yields of product 4.
-
We found that product 3 was labile to decompose to some unidentified products even kept in the refrigerator which may partially resulted in the low yields of product 4.
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29
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33846445386
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Gaussian 03, Revision C.02, M. J. Frisch, G.W. Trucks, H.B. Schlegel, G. E. Scuseria, M. A. Robb, J. R. Cheeseman, J. A. Montgomery, Jr, T. Vreven, K. N. Kudin, J. C. Burant, J. M. Millam, S. S. Iyengar, J. Tomasi, V. Barone, B. Mennucci, M. Cossi, G. Scalmani, N. Rega, G. A. Petersson, H. Nakatsuji, M. Hada, M. Ehara, K. Toyota, R. Fukuda, J. Hasegawa, M. Ishida, T. Nakajima, Y. Honda, O. Kitao, M. J. Frisch, H. Nakai, M. Klene, X. Li, J. E. Knox, H. P. Hratchian, J. B. Cross, C. Adamo, J. Jaramillo, R. Gomperts, R. E. Stratmann, O. Yazyev, A. J. Austin, R. Cammi, C. Pomelli, J. W. Ochterski, P. Y. Ayala, K. Morokuma, G. A. Voth, P. Salvador, J. J. Dannengerg, V. G. Zakrzewski, S. Dapprich, A. D. Daniels, M. C. Strain, O. Farkas, D.K. Malick, A.D. Rabuck, K. Raghavachari, J. B. Foresman, J. V. Ortiz, Q. Cui, A. G. Baboul, S. Clifford, J. Cioslowski, B. B. Stefanov, G. Liu, A. Liashenko, P. Piskorz, I. Komaromi, R. L. Martin, D. J. Fox, T. Keith, M. A. Al-Laham, C. Y. Peng, A. Nanayak
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33846435425
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3H, 0.4 equiv), showed no catalytic activity for the transformation of 3 to 4, which was further confirmed by the calculating study.
-
3H, 0.4 equiv), showed no catalytic activity for the transformation of 3 to 4, which was further confirmed by the calculating study.
-
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35
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0009276253
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An example for the sulfoxide (S-O bond) participating in a [2,3]sigmatropic rearrangement towards the formation of a new carbon-heteroatom bond, see, a) D. A. Evans, G. C. Andrews, Acc. Chem. Res. 1974, 7, 147-155; for an example for the cyclopropyl group participating in a [1,3]-sigmatropic rearrangement, see
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An example for the sulfoxide (S-O bond) participating in a [2,3]sigmatropic rearrangement towards the formation of a new carbon-heteroatom bond, see : a) D. A. Evans, G. C. Andrews, Acc. Chem. Res. 1974, 7, 147-155; for an example for the cyclopropyl group participating in a [1,3]-sigmatropic rearrangement, see:
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36
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G. D. Andrews, J. E. Baldwin, J. Am. Chem. Soc. 1976, 98, 6705-6706, and references therein. For an example for the S-S bond participating in a [2,3]-sigmatropic rearrangement towards the formation of a new carbon-heteroatom bond, see:
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b) G. D. Andrews, J. E. Baldwin, J. Am. Chem. Soc. 1976, 98, 6705-6706, and references therein. For an example for the S-S bond participating in a [2,3]-sigmatropic rearrangement towards the formation of a new carbon-heteroatom bond, see:
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33846428172
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Angew1
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33846406984
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Substrate 1m was synthesized from methylation of the corresponding aldehyde with methylmagnesium bromide and the diastereoisomers can be separated by silica gel column chromatography. We only use one of the diastereoisomers for the rearrangement reaction. At present stage, we did not determine the relative configuration of 1m shown in Scheme 4. It also should be noted that only one isomer was obtained for product 4q-1 or 4q-2, respectively.
-
Substrate 1m was synthesized from methylation of the corresponding aldehyde with methylmagnesium bromide and the diastereoisomers can be separated by silica gel column chromatography. We only use one of the diastereoisomers for the rearrangement reaction. At present stage, we did not determine the relative configuration of 1m shown in Scheme 4. It also should be noted that only one isomer was obtained for product 4q-1 or 4q-2, respectively.
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