title: Multiple losses of neutral C14H14 in the tandem mass spectrometry of several perbenzyl ether intermediates in the synthesis of green tea constituents.
abstract: Electrospray and matrix-assisted laser desorption/ionization (MALDI) tandem mass spectrometry (MS/MS) experiments were used to investigate an unusual fragmentation in collision-induced dissociation (CID) of sodiated and potassiated perbenzyl ether intermediates obtained in the total synthesis of gallate ester constituents of green tea. Prominent fragments correspond to multiple sequential losses of neutral C14H14 that were not observed in the protonated and ammoniated species, that instead present fragment ion series in which members are separated by C7H6. High-resolution MALDI quadrupole time-of-flight (Q-TOF) and electrospray-Fourier transform mass spectrometry (FTMS) were used to confirm elemental compositions of these and related ions.
authors.affiliation: The Mass Spectrometry Unit, McGill University, 740 Dr Penfield, Montreal, QC, Canada, H3A 1A4.
authors.forename: Alain
authors.initials: A
authors.lastname: Lesimple
authors.forename: Marcos
authors.initials: M
authors.lastname: Di Falco
authors.forename: Yannick
authors.initials: Y
authors.lastname: Richard
authors.forename: Souad
authors.initials: S
authors.lastname: Lesimple
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Wang
authors.forename: Tak Hang
authors.initials: TH
authors.lastname: Chan
authors.forename: Orval A
authors.initials: OA
authors.lastname: Mamer
mesh_terms: D004952:Esters / Q000138:chemical synthesis* / Q000737:chemistry; D004986:Ether / Q000737:chemistry*; D006838:Hydrocarbons / Q000737:chemistry*; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013662:Tea / Q000737:chemistry*
chemical_list: D004952:Esters; D006838:Hydrocarbons; D013662:Tea; D004986:Ether