Synthesis of selectively deuterated nitrobenzene derivatives
摘要:
Selectively ortho-deuterated nitroarenes of high isotopic purity are prepared via acid catalysed H -->D exchange in parasubstituted anilines followed by oxidation of the amino groups. (C) 2001 Elsevier Science Ltd. All rights reserved.
Elucidation of the Vicarious Nucleophilic Substitution of Hydrogen Mechanism via Studies of Competition between Substitution of Hydrogen, Deuterium, and Fluorine
Relations of rates of the vicariousnucleophilicsubstitution of hydrogen (VNS) and S(N)Ar substitution of fluorine in 2-fluoronitrobenzenes with chloroalkyl aryl sulfone carbanions were determined from competitive experiments carried out at various concentrations of base. The observed dependence of the VNS/S(N)Ar rate ratio on the base concentration confirmed the two-step mechanism of the VNS, which
Selectively ortho-deuterated nitroarenes of high isotopic purity are prepared via acid catalysed H -->D exchange in parasubstituted anilines followed by oxidation of the amino groups. (C) 2001 Elsevier Science Ltd. All rights reserved.