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Volumn 41, Issue 7, 2000, Pages 1111-1114

Regio- and stereospecific cleavage of α,β-epoxysilanes with lithium phenylsulfide

Author keywords

[No Author keywords available]

Indexed keywords

ALPHA,BETA EPOXYSILANE; ALUMINUM CHLORIDE; EPOXIDE; LITHIUM DERIVATIVE; LITHIUM PHENYLSULFIDE; SILANE DERIVATIVE; UNCLASSIFIED DRUG; VINYL DERIVATIVE;

EID: 0343384233     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(99)02242-X     Document Type: Article
Times cited : (26)

References (37)
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    • Note
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    • Although the overall process is stereospecific, the initial Z or E vinyl thioether undergoes postisomerization in solution in the presence of catalytic amounts of benzenethiol. To avoid this problem, the hydrolyzed reaction mixtures were washed with 5% aqueous sodium hydroxide solution
    • Although the overall process is stereospecific, the initial Z or E vinyl thioether undergoes postisomerization in solution in the presence of catalytic amounts of benzenethiol. To avoid this problem, the hydrolyzed reaction mixtures were washed with 5% aqueous sodium hydroxide solution.
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    • 2O)
    • 2O). We have found only one example of the formation of a trans vinyl sulfide resulting from the α-opening of a trans trimethylsilylepoxide with lithium phenylsulfide: Okamoto, S.; Yoshino, T.; Tsujiyama, H.; Sato, F. Tetrahedron Lett. 1991, 32, 5793.
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    • We have found only one example of the formation of a trans vinyl sulfide resulting from the α-opening of a trans trimethylsilylepoxide with lithium phenylsulfide
    • 2O). We have found only one example of the formation of a trans vinyl sulfide resulting from the α-opening of a trans trimethylsilylepoxide with lithium phenylsulfide: Okamoto, S.; Yoshino, T.; Tsujiyama, H.; Sato, F. Tetrahedron Lett. 1991, 32, 5793.
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    • Regiospecific β-opening of tert-butyldiphenylsilylepoxides has been observed by us in their reactions with methyllithium at -25°C (Ref. 7) and with lithium diphenylphosphide (Ref. 5)
    • Regiospecific β-opening of tert-butyldiphenylsilylepoxides has been observed by us in their reactions with methyllithium at -25°C (Ref. 7) and with lithium diphenylphosphide (Ref. 5).
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    • This result is different from the single example described of β-opening using lithium phenylsulfide They obtained the β-sulfur α-silyl alcohol resulting from β-opening of α-epoxytriisopropylsilane without Brook rearrangement
    • This result is different from the single example described of β-opening using lithium phenylsulfide: Lipshutz, B. H.; Lindsley, C. Susfalk, R.; Gross, T. Tetrahedron Lett. 1994, 35, 8999. They obtained the β-sulfur α-silyl alcohol resulting from β-opening of α-epoxytriisopropylsilane without Brook rearrangement.
    • (1994) Tetrahedron Lett. , vol.35 , pp. 8999
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    • This pathway has also been observed in the reactions of acylsilanes with diazomethane
    • This pathway has also been observed in the reactions of acylsilanes with diazomethane: Brook, A. G.; Limburg, W. W.; MacRae, D. M.; Fieldhouse, S. A. J. Am. Chem. Soc. 1967, 89, 4384, and in the reactions of α-chloroacylsilanes with Grignard reagents: Sato, T.; Abe,T.; Kuwajima, I. Tetrahedron. Lett. 1978, 259.
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    • and in the reactions of α-chloroacylsilanes with Grignard reagents
    • This pathway has also been observed in the reactions of acylsilanes with diazomethane: Brook, A. G.; Limburg, W. W.; MacRae, D. M.; Fieldhouse, S. A. J. Am. Chem. Soc. 1967, 89, 4384, and in the reactions of α-chloroacylsilanes with Grignard reagents: Sato, T.; Abe,T.; Kuwajima, I. Tetrahedron. Lett. 1978, 259.
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    • For a description of the synthetic chemistry of vinylsulfides, see: (a) Trost, B. M.; Lavoie, A. C. J. Am. Chem. Soc. 1983, 105, 5075, and references cited therein. (b) Rigby, J. H.; Sage, J. M. J. Org. Chem. 1983, 48, 3591. (c) Morris, T. H.; Smith, E. H.; Walsh, R. J. Chem. Soc. Chem. Commun. 1987, 964.
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    • For a description of the synthetic chemistry of vinylsulfides, see: (a) Trost, B. M.; Lavoie, A. C. J. Am. Chem. Soc. 1983, 105, 5075, and references cited therein. (b) Rigby, J. H.; Sage, J. M. J. Org. Chem. 1983, 48, 3591. (c) Morris, T. H.; Smith, E. H.; Walsh, R. J. Chem. Soc. Chem. Commun. 1987, 964.
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