Cobalt-Catalyzed [2. pi.+ 2. pi.+ 2. pi.](Homo-Diels-Alder) and [2. pi.+ 2. pi.+ 4. pi.] Cycloadditions of Bicyclo [2.2. 1] hepta-2, 5-dienes

…, JC Lautens, LG Edwards, CM Crudden…

Index: Lautens, Mark; Tam, William; Lautens, Julia Craig; Edwards, Louise G.; Crudden, Cathleen M.; Smith, A. Catherine Journal of the American Chemical Society, 1995 , vol. 117, # 26 p. 6863 - 6879

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Citation Number: 96

Abstract

Abstract: The scope of the cobalt-catalyzed [2n+ 2n f 2x1 (homo Diels-Alder, HDA) and [2n+ 2n+ 4n] cycloaddition reactions with norbomadienes has been investigated. Cobalt acetylacetonate, Co (acac) s or Co (acac) 2, upon reduction by diethylaluminum chloride (Et2AlCl) in the presence of 1, 2-bis (diphenylphosphino) ethane (dppe), is very effective in promoting the HDA reaction between norbornadiene and a variety of unactivated ...