Muthusamy, Sengodagounder and Gunanathan, Chidambaram and Nethaji, Munirathinam (2004) Multicomponent Reactions of Diazoamides: Diastereoselective Synthesis of Mono- and Bis-spirofurooxindoles. In: Journal of Organic Chemistry, 69 (17). pp. 5631-5637.
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This paper describes the intermolecular generation of carbonyl ylides by dirhodium(II) tetraacetate-catalyzed reaction of 3-diazoindol-2-ones in the presence of aryl aldehydes and heteroaryl aldehydes. These carbonyl ylides were subsequently trapped with dipolarophiles such as dimethyl acetylenedicarboxylate, maleic anhydride, and ethyl acrylate to afford spirofurooxindoles. Consequently, diastereoselective synthesis of spirodihydrofurooxindoles through the multicomponent reactions of cyclic diazoamides was successfully achieved for the first time. The stereochemistry of the spirofurooxindole is unequivocally corroborated by the single-crystal X-ray analysis of the representative product 4o. Interestingly, these reactions were extended to double multicomponent reactions of bis-cyclic diazoamides to afford the respective complex polycycles in a tandem manner, which led to the construction of four carbon-carbon bonds, two carbon-oxygen bonds, and four chiral centers in a single synthetic step.
|Item Type:||Journal Article|
|Additional Information:||Copyright for this article belongs to American Chemical Society.|
|Keywords:||mediated dipolar cycloaddition;h insertion reactions;carbonyl y|
|Department/Centre:||Division of Chemical Sciences > Inorganic & Physical Chemistry|
|Date Deposited:||25 Aug 2008|
|Last Modified:||17 Jan 2012 09:06|
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