Transition metal mediated exo selective Diels-Alder reactions: Preparation of 2-cobalt-substituted 1, 3-dienes containing C 2 symmetric 2, 3-dibenzobicyclo [2.2. 2] …
MW Wright, ME Welker
Index: Wright, Marcus W.; Welker, Mark E. Journal of Organic Chemistry, 1996 , vol. 61, # 1 p. 133 - 141
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Citation Number: 46
Abstract
The preparation of C 2 symmetric 2, 3-dibenzobicyclo [2.2. 2] octanedione dioxime is reported. This ligand is then used in the preparation of a (pyridine)(glyoxime) 2cobalt (III) chloride complex. The chloride is reduced to a cobaloxime anion which reacted with allenic electrophiles to produce (pyridine)(glyoxime) 2cobalt-1, 3-dienyl complexes. Thermal and Lewis acid catalyzed Diels-Alder reactions of these dienyl complexes as well as the ...
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