Acid-promoted synthesis of per-O-sulfated fucooligosaccharides related to fucoidan fragments
作者:Vadim B. Krylov、Zinaida M. Kaskova、Dmitry Z. Vinnitskiy、Nadezhda E. Ustyuzhanina、Alexey A. Grachev、Alexander O. Chizhov、Nikolay E. Nifantiev
DOI:10.1016/j.carres.2011.01.005
日期:2011.4
has been performed with the use of previously reported acid-promoted protocol for per-O-sulfation of polyols by SO(3) complexes. During the treatment of (1-->3)-linked oligofucosides under these conditions with the promotion by TfOH, the unusual rearrangement of the reducing pyranose residue into furanose one was observed. To avoid the formation of rearrangement by-products, the use of a series of strong