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Benzenesulfenic acid 2-(trimethylsilyl)ethyl ester was prepared by reaction of benzenesulfenyl chloride with 2-(trimethylsilyl)ethyl alcohol. By comparison, the analogous sulfoxides are readily available from commercial compounds according to: (a) Schwan, A. L.; Pippert, M. F. Tetrahedron: Asymmetry 1995, 6, 131.
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Benzenesulfenic acid 2-(trimethylsilyl)ethyl ester was prepared by reaction of benzenesulfenyl chloride with 2-(trimethylsilyl)ethyl alcohol. By comparison, the analogous sulfoxides are readily available from commercial compounds according to: (a) Schwan, A. L.; Pippert, M. F. Tetrahedron: Asymmetry 1995, 6, 131.
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The reactivity of more sophisticated β-silyl sulfoxides with TBAF has previously been investigated by the group of Toru, but their attention was focused on the alkene product: (a) Nakamura, S.; Watanabe, Y.; Toru, T. J. Chem. Soc., Perkin Trans. 1 1999, 3403.
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For deprotection of selenothioic acid S-esters: (i) Murai, T.; Kamoto, T.; Kato, S. J. Am. Chem. Soc. 2000, 122, 9850.
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For deprotection of phosphinoselenothioic acid S-esters: (l) Kimura, T.; Murai, T. Chem. Commun. 2005, 4077.
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34249068465
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3N.
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3N.
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52
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0033590757
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53
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34249004218
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8.
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54
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34249103836
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Crystal structure determination of 1b: Single crystals of sulfoxide 1b suitable for X-ray crystallographic analysis were obtained by slow diffusion of pentane in CH2Cl2 soln. X-ray diffraction experiments for monocrystal of 1b were performed at 150 K with graphite-monochromatized MoKα radiation on a Bruker-Nonius Kappa CCD area detector diffractometer. Formula C11H 17BrOSSi, Mr 305.31, crystal system triclinic, space group P1, a, 6.5653 (3) Å, b, 10.1206 (4) Å, c, 11.8654 (5) Å, α, 66.082.(2)°, β, 78.256 (3)°, γ, 80.455 (3)°, V, 702.54 (5) Å3, Z, 2, density calcd, 1.443 g/cm3, μ, 3.135 cm-1, R, 0.0386, wR, 0.0997. Selected bond lengths (Å) and angles(deg, Br1-C1 1.8912 (14, S1-O1 1.4930 (13, S1-C4 1.7924 1
-
-1, R = 0.0386, wR = 0.0997. Selected bond lengths (Å) and angles(deg): Br1-C1 1.8912 (14), S1-O1 1.4930 (13), S1-C4 1.7924 (13), S1-C7 1.8248 (14), Si1-C8 1.8792 (14), Si1-C9 1.8512 (18), Si1-C10 1.862 (2), Si1-C11 1.862 (2), C7-C8 1.512 (2), O1-S1-C4 106.27 (7), O1-S1-C7 106.60 (7), C4-S1-C7 97.78 (6), C11-Si1-C8 106.90 (8), C9-Si1-C8 109.56 (9), C10-Si1-C8 110.30 (10). Program(s)used to solve structure: SHELXS97. Program(s)used to refine structure: SHELXL97. Software used to prepare material for publication: SHELXL97. Crystallographic data for compound lb have been deposited at the Cambridge Crystallographic Data Centre, CCDC No 629340. Copies of this information may be obtained free of charge from The Director, CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK; +44 (1223)336408; E-mail: deposit@ccdc.cam.ac.uk or http://www.ccdc.cam.ac.uk.
-
-
-
-
55
-
-
0010891930
-
-
An intramolecular coordination between the oxygen atom of the sulfoxide group and the silicon center was previously detected at low temperature with the analogous electron deficient trifluorosilyl derivatives: Pestunovich, V. A, Larin, M. F, Sorokin, M. S, Albanov, A. I, Voronkov, M. G. J. Organomet. Chem. 1985, 280, C17
-
An intramolecular coordination between the oxygen atom of the sulfoxide group and the silicon center was previously detected at low temperature with the analogous electron deficient trifluorosilyl derivatives: Pestunovich, V. A.; Larin, M. F.; Sorokin, M. S.; Albanov, A. I.; Voronkov, M. G. J. Organomet. Chem. 1985, 280, C17.
-
-
-
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56
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0342305079
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Similar structural effects involving the 2-(trimethylsilyl)ethyl system have already been mentioned with carboxylate and sulfenate esters: Green, A. J.; Issa, W.; White, J. M. Aust. J. Chem. 1997, 50, 927.
-
Similar structural effects involving the 2-(trimethylsilyl)ethyl system have already been mentioned with carboxylate and sulfenate esters: Green, A. J.; Issa, W.; White, J. M. Aust. J. Chem. 1997, 50, 927.
-
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57
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See for example
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See for example: Akazome, M.; Noguchi, M.; Tanaka, O.; Sumikawa, A.; Uchida, T.; Ogura, K. Tetrahedron 1997, 53, 8315.
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60
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34249079668
-
-
Spectral data are in agreement with those previously reported by us. 6a
-
6a
-
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61
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5644249429
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Touaibia, M.; Desjardins, M.-A.; Provençal, A.; Audet, D.; Médard, C.; Morin, M.; Breau, L. Synthesis 2004, 2283.
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34249023260
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The reaction was carried out with a mixture of both Z- and E-isomers but also the geometrically pure substrates.
-
The reaction was carried out with a mixture of both Z- and E-isomers but also the geometrically pure substrates.
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65
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0000160514
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A similar reluctance towards fluoridolysis was also observed with the analogous isopropyl derivative and also in the sulfide series: (a) Anderson, M. B, Ranasinghe, M. G, Palmer, J. T, Fuchs, P. L. J. Org. Chem. 1988, 53, 3125
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A similar reluctance towards fluoridolysis was also observed with the analogous isopropyl derivative and also in the sulfide series: (a) Anderson, M. B.; Ranasinghe, M. G.; Palmer, J. T.; Fuchs, P. L. J. Org. Chem. 1988, 53, 3125.
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