Sugar bislactones by one-step oxidative dimerisation with pyridinium chlorochromate versus regioselective oxidation of vicinal diols
作者:Amélia P. Rauter、Fátima Piedade、Tânia Almeida、Rui Ramalho、Maria J. Ferreira、Ricardo Resende、Joana Amado、Helena Pereira、Jorge Justino、Ana Neves、Filipa V.M. Silva、Tana Canda
DOI:10.1016/j.carres.2004.06.002
日期:2004.8
Synthesis of 10-membered bislactones by PCC oxidation of methyl 2,6-di-O-pivaloyl-alpha-D-glucopyranoside and methyl 4,6-O-benzylidene-alpha-D-glucopyranoside is described, with emphasis on their structure elucidation using the information gained by combination of NMR spectroscopic techniques with X-ray diffraction data. In alternative, the use of PCC and PCC adsorbed on silica gel or alumina for the regioselective oxidation of vicinal diols in sugars is also reported. Both bislactones showed antifungal activity against Candida albicans, and were slightly active against the bacteria Bacillus subtilis. The bislactone presenting pivaloyl protecting groups also promoted some growth inhibition of Staphylococcus aureus. (C) 2004 Elsevier Ltd. All rights reserved.