O-Alkylation of <i>N</i>-Phenylhydroxylamine in Dimethyl Sulfoxide with Methylarenesulfonates
作者:K. R. Fountain、Robert D. White、Kamlesh D. Patel、Dallas G. New、Xu、Aaron J. Cassely
DOI:10.1021/jo951448z
日期:1996.1.1
The methylation of N-phenylhydroxylamine (NPHA) with methylarenesulfonates in DMSO gives alkylation of the O atom in contrast to methylation in methanol where N alkylation occurs. The Hammett rho values indicate that alkylations with N-methylanilines and NPHAs both involve the N atom. The NPHAs show ''nominal alpha-effects'' but involve comparison of N atoms with O atoms. The reactivity of the principle component, the zwitterion I, is examined with leaving group studies and comparison with benzyl alkoxide reactivity.
Fountain, Kenneth R.; Fountain, Daniel P.; Michaels, Bernice, Canadian Journal of Chemistry, 1991, vol. 69, # 5, p. 798 - 810
作者:Fountain, Kenneth R.、Fountain, Daniel P.、Michaels, Bernice、Myers, D. Brenton、Salmon, Jon K.、et al.