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34748910606
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This solvent was already reported as the more efficient solvent for a 4-exo trig process: ref.[2b,2h
-
[2b,2h]
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47
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34748831638
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[13] as implemented in the AMPAC program version 4.0 QCPE No527. The geometries were optimized by using the Davidson-Fletcher-Powell algorithm (FLEPO procedure) that minimizes the energy with respect to all internal coordinates
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[13] as implemented in the AMPAC program version 4.0 QCPE No527. The geometries were optimized by using the Davidson-Fletcher-Powell algorithm (FLEPO procedure) that minimizes the energy with respect to all internal coordinates.
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48
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33845373733
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A. Sevin, J. Tortajada, M. Pfau, J. Org. Chem. 1986, 51, 2671.
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50
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34748850674
-
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These calculations excluded any other configuration for the nitrogen atom. Any attempt at optimisation led to the stable configuration proposed here
-
These calculations excluded any other configuration for the nitrogen atom. Any attempt at optimisation led to the stable configuration proposed here.
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51
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34748842596
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[17], α-halo azetidines are known to be unstable and rearrange to pyrrolidines: (Chemical Equation Presented)
-
[17], α-halo azetidines are known to be unstable and rearrange to pyrrolidines: (Chemical Equation Presented)
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0038684522
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34748827963
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The (Z) configuration was based upon the coupling (7.0 Hz) of the ethylene hydrogen atoms.
-
The (Z) configuration was based upon the coupling (7.0 Hz) of the ethylene hydrogen atoms.
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55
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0043074883
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For an anti elimination of β-silyl azides, see: L. Chabaud, Y. Landais, Tetrahedron Lett. 2003, 44, 6995.
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56
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37049088184
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59
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84987005695
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For an example of the ring opening of azetidinium ions by a β-elimination, see
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33748802801
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N2′ ring opening of four-membered cyclic ammonium ions, see: F. Couty, F. Durrat, G. Evano, J. Marrot, Eur. J. Org. Chem. 2006, 4214.
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N2′ ring opening of four-membered cyclic ammonium ions, see: F. Couty, F. Durrat, G. Evano, J. Marrot, Eur. J. Org. Chem. 2006, 4214.
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