Quaternary ammoniumsalts (QASs) have been widely used for disinfection purposes because of their low price, high efficacy and low human toxicity for decades. However, precise mechanisms of action nor the powerful versatile agent against all antimicrobial species are known. In this study we have prepared 43 novel N-alkyl monoquaternary ammoniumsalts including 7 N,N-dialkyl monoquaternary ammonium salts
作者:Humayun Pervez、Samuel O. Onyiriuka、Lilias Rees、James R. Rooney、Colin J. Suckling
DOI:10.1016/s0040-4020(01)86158-5
日期:1988.1
tetrafluoroborate or nitrogendioxide to yield activated intermediates capable of selectively nitrating phenol ortho to the hydroxyl group with virtually complete selectivity and in quantitative yield in aprotic solvents. Although the nitration of phenol itself is exceptionally selective, the nitration of some substitutedphenols lead to mixtures of mononitrated products and in especially reactive cases such