作者:Michael J. Corr、Mark D. Roydhouse、Kirsty F. Gibson、Sheng-ze Zhou、Alan R. Kennedy、John A. Murphy
DOI:10.1021/ja908191k
日期:2009.12.16
2-Dimethylalkylammonium pyridinium and 2-dimethylalkylammonium pyrimidinium ditriflate salts are very powerful methylating agents toward phosphorus (triphenylphosphine) and nitrogen (triethylamine) nucleophiles. In competition experiments with triethylamine as nucleophile, these N-methyl disalts are more reactive methylating agents than dimethyl sulfate. Reaction of the pyridinium dications with water as an oxygen nucleophile