It was recently reported that the venerable Newman− Kwart rearrangement (1→ 2) proceeds via mixed first-and second-order kinetics. Prior to this, the rearrangement had been considered to proceed exclusively via an intramolecular OAr→ SAr migration. A new bimolecular pathway, possibly involving an 8-membered cyclic transition state, was proposed to account for reaction rates that increased disproportionately with substrate ...
[Moseley, Jonathan D.; Lenden, Philip; Lockwood, Mark; Ruda, Katinka; Sherlock, Jon-Paul; Thomson, Anthony D.; Gilday, John P. Organic Process Research and Development, 2008 , vol. 12, # 1 p. 30 - 40]
