Chlorination of 2-Phenoxypropanoic Acid with NCP in Aqueous Acetic Acid: Using a Novel Ortho−Para Relationship and the Para/Meta Ratio of Substituent Effects for Mechanism Elucidation
作者:Manuel A. P. Segurado、João Carlos R. Reis、Jaime D. Gomes de Oliveira、Senthamaraikannan Kabilan、Manohar Shanthi
DOI:10.1021/jo0706224
日期:2007.7.1
beyond the aromatic ring. Activation enthalpies and entropies were estimated for substrates bearing the isoselective substituent in either ortho and para positions, being demonstrated that they are much different from the values for the parent substrate. The electrophilic attack on the phenolic oxygen atom by the protonated chlorinating agent is proposed as the rate-determiningstep, this step being followed