Friday, 6 October 2006 - 10:20 AM
Great Hall (Christ Episcopal Church)
200

Mechanistic studies on ortholithiation and the anionic Fries rearrangement

Jason C. Riggs, Kanwaljit Singh, and David B. Collum. Cornell University, Ithaca, NY

LDA-mediated ortholithiation and subsequent anionic Fries rearrangement of N,N-dialkyl-O-phenyl carbamates in mono- and bis-chelating solvents were investigated. Variable temperature 6Li, 13C, and 15N NMR spectroscopies and DFT computations were used to characterize monosolvated mixed dimers (1) in solution. Rate studies reveal multiple pathways for the lithiation and rearrangement.


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