(R)-(+)-DBD-Pro-COCl [=(R)-(+)-4-(N,N-Dimethylaminosulfonyl)-7-(2-chloroformylpyrrolidin-1-yl)-2,1,3-benzoxadiazole] [HPLC Labeling Reagent for e.e. Determination]

The compound 1 is an HPLC fluorescence labeling reagent for optical purity determination, which easily reacts with optical active alcohols or amines to form the corresponding esters or amides, respectively. The resultant esters or amides are stable and can reach the detector without any decomposition under reversed and normal phase HPLC. An excellent chromatogram can be obtained by fluorescence detection at the excitation and emission wavelength of 450 nm and 560 nm, respectively. And the diastereomers derived from racemic alcohol and 1 can be separated by HPLC (The separation factor α: 2-hexanol = 1.2). Since no racemization can occur with derivatization reaction, it is possible to change an elution order of the labeled diastereomeres by selecting the enantiomer [(S)-(-)-DBD-Pro-COCl] of 1. The detection limit for the alcohols is sub-picomol. A highly sensitive analysis can be done by peroxyoxalate chemiluminescence detection.

Application example:
[Secondary alcohols] ¹⁾
Add 1 mL of 10 mM labeling reagent 1 / dry benzene solution, 1 mL of 2 mM alcholol / dry benzene (containing 1% of pyridine) solution to a vessel. Close the cap of the reaction vessel and incubate the mixture at 80 °C for 3 h. After cooling to room temperature, excess of 1 is removed by liquid-liquid extraction (e.g. washing with 5% NaHCO₃ solution) or solid phase extraction. Use the resultant as an HPLC sample solution.

TCI Products Pamphlet
HPLC Labeling Reagents ( PDF 10MB )