2-Nitro sugar derivatives bearing an axial nitro group were proved to be thermodynamically more stable than the corresponding 2-epimers, bearing an equatorial nitro group.
事实证明,带有轴向硝基的 2-硝基糖衍生物比带有赤道硝基的相应 2-表亚胺在热力学上更稳定。
Preparation of 2-C- and 3-C-cyano-2-enopyranoside derivatives and their epoxidation
Methyl 4,6-O-benzylidene-2-C- and 3-C-cyano-2,3-dideoxy-D-erythro-hex-2-enopyranosides and -2-enitols were prepared and their epoxidation was performed. (C) 2007 Elsevier Ltd. All rights reserved.
Nucleophilic addition reactions of 1,5-anhydro-4,6-O-benzylidene-2,3-dideoxy-3-C-nitro-d-erythro-hex-2-enitol and its 5a-carba derivative
Abstract Reactions of the title compounds with several nucelophiles suggested that the ring oxygen atom (O-5) accelerated the reactivity of the nitro alkene moiety, but scarcely affected the stereoselectivity of the nucleophilic attack.