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.
