Compounds
35 (each 1 mg) were treated with 4 M TFA at 110 C for 4 h to give
their acid hydrolysates. The acid hydrolysate of each compound was
then derivatized with 2,3-naphthalenediamine using molecular iodine as
catalyst to obtain the fluorescent naphthimidazole derivative of the
mannopyranose (manno-NAIM) as previously reported.11 The fluorescent
product was further applied for chiral resolution using the
ligand exchange capillary electrophoresis (LECE) method.18,19 Electrophoretic
experiments were carried out using a Beckman Coulter
capillary electrophoresis system (model P/ACE MDQ, USA) equipped
with a photodiode array UV detector.