The proton of the cycloheptatrienyl moiety in 7-benzylsulphonyl-1,3,5-cycloheptatriene is found to be at least 300 times more acidic than those of the benzyl moiety in the same molecule towards potassium amide in liquid ammonia (at –40 °C).
A. W. Zwaard and H. Kloosterziel, J. Chem. Soc., Chem. Commun., 1982, 391 DOI: 10.1039/C39820000391
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