Manno-<i>epi</i>-cyclophellitols Enable Activity-Based Protein Profiling of Human α-Mannosidases and Discovery of New Golgi Mannosidase II Inhibitors
作者:Zachary Armstrong、Chi-Lin Kuo、Daniël Lahav、Bing Liu、Rachel Johnson、Thomas J. M. Beenakker、Casper de Boer、Chung-Sing Wong、Erwin R. van Rijssel、Marjoke F. Debets、Bogdan I. Florea、Colin Hissink、Rolf G. Boot、Paul P. Geurink、Huib Ovaa、Mario van der Stelt、Gijsbert M. van der Marel、Jeroen D. C. Codée、Johannes M. F. G. Aerts、Liang Wu、Herman S. Overkleeft、Gideon J. Davies
DOI:10.1021/jacs.0c03880
日期:2020.7.29
Golgi mannosidase II (GMII) catalyzes the sequential hydrolysis of two mannosyl residues from GlcNAcMan5GlcNAc2 to produce (GlcNAcMan3GlcNAc2), the precursor for all complex N-glycans, including the branched N-glycans associated with cancer. Inhibitors of GMII are potential cancer therapeutics, but their usefulness is limited by off-target effects, which produce α-mannosidosis-like symptoms. Despite
Novel benzoxaborole derivatives were designed as efficient catalysts for the highly site‐selective and protecting‐group‐free modification of polyols, such as carbohydrate. Additionally, the benzoxaborolecatalyst could tolerate diverse modifications of polyols, including acylation, sulfonylation, alkylation, and glycosylation.
The Use of Grignard Reagents in the Synthesis of Carbohydrates. III. The One-way Anomerization of Methyl Glycofuranosides and the Opening of Their Furanose Rings
作者:Masajiro Kawana、Hiroyoshi Kuzuhara、Sakae Emoto
DOI:10.1246/bcsj.54.1492
日期:1981.5
The anomerization of methyl glycofuranoside derivatives with methylmagnesium iodide or t-butylmagnesium bromide occurred in a one-way manner. For example, methyl 5-O-benzyl-β-D-ribofuranoside (3β) was converted into the corresponding α-anomer (3α) in a 95% yield when a mixture of 3β and t-butylmagnesium bromide in benzene–ether was heated at about 75 °C to remove the ether; the reverse reaction (from