作者:Nittert Marinus、Nabil Tahiri、Margherita Duca、L. M. C. Marc Mouthaan、Simona Bianca、Marco van den Noort、Bert Poolman、Martin D. Witte、Adriaan J. Minnaard
DOI:10.1021/acs.orglett.0c01986
日期:2020.7.17
Unprotected 3-keto-saccharides have become readily accessible via site-selective oxidation, but their protection-free functionalization is relatively unexplored. Here we show that protecting groups are obsolete in a variety of stereoselective modifications of our model substrate methyl alpha-glucopyranoside. This allows the preparation of rare sugars and the installation of click handles and reactive groups. To showcase the applicability of the methodology, maltoheptaose has been converted into a chemical probe, and the rare sugar evalose has been synthesized.