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37049090681
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Merseburg, Germany, July 10-15
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Presented in part at the 16th International Symposium on the Organic Chemistry of Sulfur, Merseburg, Germany, July 10-15, 1994 and at the 78th Canadian Chemical Conference, Guelph, Ontario, May 28-June 1, 1995. Aspects of this project have been published in communication form. See: Schwan, A. L.; Refvik, M. D. J. Chem. Soc., Chem. Commun. 1995, 1949.
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(1994)
16th International Symposium on the Organic Chemistry of Sulfur
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2
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37049090681
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Guelph, Ontario, May 28-June 1
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Presented in part at the 16th International Symposium on the Organic Chemistry of Sulfur, Merseburg, Germany, July 10-15, 1994 and at the 78th Canadian Chemical Conference, Guelph, Ontario, May 28-June 1, 1995. Aspects of this project have been published in communication form. See: Schwan, A. L.; Refvik, M. D. J. Chem. Soc., Chem. Commun. 1995, 1949.
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(1995)
78th Canadian Chemical Conference
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3
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37049090681
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Presented in part at the 16th International Symposium on the Organic Chemistry of Sulfur, Merseburg, Germany, July 10-15, 1994 and at the 78th Canadian Chemical Conference, Guelph, Ontario, May 28-June 1, 1995. Aspects of this project have been published in communication form. See: Schwan, A. L.; Refvik, M. D. J. Chem. Soc., Chem. Commun. 1995, 1949.
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Schwan, A.L.1
Refvik, M.D.2
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For reviews on the synthesis and reactions of sulfenamides see: (a) Craine, L.; Raban, M. Chem. Rev. 1989, 89, 689. (b) Capozzi, G.; Modena, G.; Pasquato, L. In The Chemistry of Sulfenic Acids and their Derivatives; Patai, S., Ed.; J. Wiley & Sons: New York, 1990; p 487.
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For reviews on the synthesis and reactions of sulfenamides see: (a) Craine, L.; Raban, M. Chem. Rev. 1989, 89, 689. (b) Capozzi, G.; Modena, G.; Pasquato, L. In The Chemistry of Sulfenic Acids and their Derivatives; Patai, S., Ed.; J. Wiley & Sons: New York, 1990; p 487.
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0001381273
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For details of the conversion of thiirane S-oxide to 1-alkene-sulfenate, see Refvik, M. D.; Froese, R. D. J.; Goddard, J. D.; Pham, H. H.; Pippert, M. F.; Schwan, A. L. J. Am. Chem. Soc. 1995, 117, 184.
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Pippert, M.F.5
Schwan, A.L.6
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3643070156
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note
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Full practical details of the preparation of compounds 4 will presented elsewhere.
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3643123341
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note
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1H NMR and GC/MS revealed two isomeric N,N-bis(1-methylethyl)hexenesulfenamides in an expected ratio.
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3643095227
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note
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Compounds 6 are not particularly stable: they have a limited lifetime in the freezer and do not exhibit ideal chromatographic behavior. Loss of a benzoyl unit is one of their fates. For this reason, satisfactory elemental analysis could not be obtained. A referee has suggested that compounds 6 may not have the structures that we have assigned to them, but that they could possess C=O and C=N bonds rather than two C=O bonds. Indeed, based on our synthetic method, structures such as 1-alkenyl-SN-C(Ph)OC(O)Ph would also conform with the measured spectral data. The alternative isomers would also be expected to undergo chemistry consistent with our experimental observations.
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3643134685
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note
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The solvent was DMSO. The sample decomposed rapidly above 185 °C.
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37049121350
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Almog, J.; Barton, D. H. R.; Magnus, P. D.; Norris, R. K. J. Chem. Soc., Perkin Trans. 1 1974, 853.
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Barton, D.H.R.2
Magnus, P.D.3
Norris, R.K.4
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3643056522
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note
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Other primary amines afforded mixtures containing a number of constituents whose identity changed thoughout workup. One component, isolated from a transamination attempt with n-hexylamine, was determined to be N,N′-dit(1-hexyl)phthalamide (19%).
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85087581649
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note
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1H NMR spectra, but not in the spectrum of pure material.
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46
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85087582801
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note
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1H NMR spectra of the alkenesulfenamides 8 generated from transaminations of thiophthalimides 7. Only in the synthesis of sulfenamide 8a did we observe a ring-opening product of the type 13 (ca. 10%). Other experiments have shown that the ring-opened product would not survive the oxidation process.
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Azide ion was the nucleophile, (tert-butylimino)phthalide was the substrate, see: Keung Au, T.; Baydar, A. E.; Boyd, G.V. J. Chem. Soc., Perkin Trans. 1 1981, 2884.
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Baydar, A.E.2
Boyd, G.V.3
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0000540212
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Expeditious proton removal from the quaternary nitrogen of 14 requires that the lone pair left behind is in conjugation with the carbonyl, see: Perrin, C. L. Acc. Chem. Res. 1989, 22, 268. It would seem logical that with more hydrogens on the nitrogen, the required conformation will be more achievable and the hydrogen transfer more rapid.
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Perrin, C.L.1
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0001544568
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(b) Schwan, A. L.; Brillon, D.; Dufault, R. Can. J. Chem. 1994, 72, 325.
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Dufault, R.3
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