Trityl Derivatives for Enhancing Mass Spectrometry
申请人:Southern Edwin Mellor
公开号:US20090023926A1
公开(公告)日:2009-01-22
The present invention provides a compound of the formula: (IIa); having a reactive functional group M, capable of reacting with a biopolymer, BP, having at least one group capable of reacting with M to form a covalent linkage, to provide a biopolymer derivative of the formula: (IIIa). The biopolymer derivatives of the invention have enhanced ionisability with respect to free 10 biopolymer (Bp) enabling improved analysis of the biopolymer using mass spectrometry. The invention further provides specific examples of compounds formula (IIa), e.g. compounds of formula: (IIa-2
a
) and (IIa-58
a
).
Compounds of formula (IIa):
are provided where:
X is a group capable of being cleaved from the α-carbon atom to form an ion of formula (I')
C is a carbon atom bearing a single positive charge or a single negative charge;
The invention further provides compounds of formula (IIb):
where:
X is a counter-ion to C.
The compounds of formula (IIa) and (IIb) may form ions of formula (I') by either cleaving the C-X bond between X and the α-carbon atoms in the case of the compounds of formula (IIa) or dissociating X in the case of compounds of formula (IIb).
Reactive trityl derivatives: stabilised carbocation mass-tags for life sciences applications
作者:Alexey V. Ustinov、Vadim V. Shmanai、Kaajal Patel、Irina A. Stepanova、Igor A. Prokhorenko、Irina V. Astakhova、Andrei D. Malakhov、Mikhail V. Skorobogatyi、Pablo L. Bernad、Safraz Khan、Mona Shahgholi、Edwin M. Southern、Vladimir A. Korshun、Mikhail S. Shchepinov
DOI:10.1039/b810600b
日期:——
The rational design of novel triarylmethyl (trityl)-based mass tags (MT) for mass-spectrometric (MS) applications is described. We propose a "pK(R+) rule" to correlate the stability of trityl carbocations with their MS performance: trityls with higher pK(R+) values ionise and desorb better. Trityl blocks were synthesised that have high pK(R+) values and are stable in conditions of MS analysis; these