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For pioneering work on the use of 1-substituted 3-stannylated alkenyl carbamates, see: Krämer, T.; Schwark, J.-R.; Hoppe, D.; Zschage, O. Tetrahedron Lett. 1989, 30, 7037; Zschage, O.; Schwark, J.-R.; Hoppe, D. Angew. Chem., Int. Ed. Engl. 1989, 29, 296; Hoppe, D.; Krämer, T.; Schwark, J.-R.; Zschage, O. Pure Appl. Chem. 1990, 62, 1999. For utilization of enantiomerically enriched 3-stannylated alkenyl carbamates in acid catalysed sterocontrolled homoaldol reactions, see: Paulsen, H.; Graeve, C.; Hoppe, D. Synthesis 1996, 141.
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For pioneering work on the use of 1-substituted 3-stannylated alkenyl carbamates, see: Krämer, T.; Schwark, J.-R.; Hoppe, D.; Zschage, O. Tetrahedron Lett. 1989, 30, 7037; Zschage, O.; Schwark, J.-R.; Hoppe, D. Angew. Chem., Int. Ed. Engl. 1989, 29, 296; Hoppe, D.; Krämer, T.; Schwark, J.-R.; Zschage, O. Pure Appl. Chem. 1990, 62, 1999. For utilization of enantiomerically enriched 3-stannylated alkenyl carbamates in acid catalysed sterocontrolled homoaldol reactions, see: Paulsen, H.; Graeve, C.; Hoppe, D. Synthesis 1996, 141.
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For pioneering work on the use of 1-substituted 3-stannylated alkenyl carbamates, see: Krämer, T.; Schwark, J.-R.; Hoppe, D.; Zschage, O. Tetrahedron Lett. 1989, 30, 7037; Zschage, O.; Schwark, J.-R.; Hoppe, D. Angew. Chem., Int. Ed. Engl. 1989, 29, 296; Hoppe, D.; Krämer, T.; Schwark, J.-R.; Zschage, O. Pure Appl. Chem. 1990, 62, 1999. For utilization of enantiomerically enriched 3-stannylated alkenyl carbamates in acid catalysed sterocontrolled homoaldol reactions, see: Paulsen, H.; Graeve, C.; Hoppe, D. Synthesis 1996, 141.
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See for significant examples: a) Arylseleninic acids obtained from diselenide and t-butyl hydroperoxide, Hori, T.; Sharpless, K. B. J. Org. Chem. 1978, 43, 1689. b) 2-Pyridineseleninic anhydride, Crich, D.; Barton, D. H. R. Tetrahedron, 1985, 41, 4359.
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Trost, B. M. and Fleming, I. Eds; Pergamon Press: Oxford, and references cited therein
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For a review see: Kitching, W. Oxidation of Carbon-Metal Bonds, in Comprehensive Organic Synthesis; Trost, B. M. and Fleming, I. Eds; Pergamon Press: Oxford, 1991; 7, 613 and references cited therein. A new example involves oxidative clivage of stannanes with ozone: Linderman, R. J.; Jaber, M. Tetrahedron Lett. 1994, 35, 5993.
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Kitching, W.1
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For a review see: Kitching, W. Oxidation of Carbon-Metal Bonds, in Comprehensive Organic Synthesis; Trost, B. M. and Fleming, I. Eds; Pergamon Press: Oxford, 1991; 7, 613 and references cited therein. A new example involves oxidative clivage of stannanes with ozone: Linderman, R. J.; Jaber, M. Tetrahedron Lett. 1994, 35, 5993.
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0000832426
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The preparation of the (E)-3b has been carried out from (E)-crotonaldehyde as following: (Equation Presented) 93-99% For related transformations, see: Sengupta, S.; Snieckus, V. J. Org. Chem. 1990, 55, 5680. Marshall, J. A.; Welmaker, G. S. J. Org. Chem. 1992, 57, 7158.
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0003347159
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The preparation of the (E)-3b has been carried out from (E)-crotonaldehyde as following: (Equation Presented) 93-99% For related transformations, see: Sengupta, S.; Snieckus, V. J. Org. Chem. 1990, 55, 5680. Marshall, J. A.; Welmaker, G. S. J. Org. Chem. 1992, 57, 7158.
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JCO 95, Palaiseau, France September 12-15
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85033765776
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note
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3 solution. After decantation the aqueous phase was extracted with 3×10 ml of diethyl ether. The combined organic phases were treated as above to give, after flash chromatography, pure alcohol 4a (207 mg, 98% yield, E/Z = 95:5).
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34
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0000012312
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Olefin cyclisation processes that form carboncarbon bonds
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Morrison, J. D. Ed.; Academic Press: Orlando
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Bartlett, P.A.1
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85033765659
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As claimed by one referee, the weaker C-Sn than C-H bond can also facilitate the initiation of the reaction
-
As claimed by one referee, the weaker C-Sn than C-H bond can also facilitate the initiation of the reaction.
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36
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33947089142
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Sharpless, K. B.; Lauer, R. F. J. Am. Chem. Soc. 1972, 94, 7154. Stephenson, L. M., Speth, D. R. J. Org. Chem. 1979, 44, 4683.
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Sharpless, K. B.; Lauer, R. F. J. Am. Chem. Soc. 1972, 94, 7154. Stephenson, L. M., Speth, D. R. J. Org. Chem. 1979, 44, 4683.
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