398-49-2Relevant academic research and scientific papers
Determination of Hydroxyaromatic Compounds in Complexes Mixtures by Tandem Mass Spectrometry
Stach, Joachim,Zimmer, Dieter,Moeder, Monika,Herzschuh, Rainer
, p. 946 - 952 (2007/10/02)
Derivatization of alkylated hydroxyaromatics with N-methyl-bis(trifluoroacetamide) is used for a rapid screening for alkylated hydroxyaromatic compounds in complex mixtures by tandem mass spectrometry.Applications are based on a detailed investigation of the fragmentation reactions of derivatized alkylated phenols, 2,3-dihydroindenols, indenols, 1,2,3,4-tetrahydronaphthols and naphthols.As shown by daughter-ion mass spectra obtained in different field-free regions ofba BEQQ-instrument, the loss of CF3COOH, CF3CO radical or CF3COO radical, respectively, is common for the compounds studied and acn be used for their detection by means of neutral mass loss scans.
Synthesis and carbon-13 NMR study of some methanesulfonyloxy and trifluoroacetoxy derivatives of naphthalene
Wazeer, Mohammed I. M.,Ali, Sk. Asrof,Arab, Mohammed
, p. 843 - 848 (2007/10/02)
Several mono- and di-methanesulfonyloxy (mesyloxy) and trifluoroacetoxy derivatives of naphthalene were prepared and their C-13 NMR recorded.The C-13 NMR spectra were analysed and the complete assignment of aromatic carbon chemical shifts reported.The substituent induced chemical shifts of naphthalene due to mesyloxy and trifluoroacetoxy groups were derived and compared with that of the hydroxy substituent.Carbon chemical shifts of disubstituted naphthalenes were calculated by simple additivity of substituent induced chemical shifts.The experimental chemical shifts were compared with the calculated shifts and deviations discussed in terms of steric and electronic effects of the substituents.
