Cyclizations of Dialdehydes with Nitromethane. VIII.1A Spontaneous Epimerization in aci-Nitro Glycosides and its Significance in the Preparation of Derivatives of 3-Amino-3-deoxy-D-mannose, -D-glucose, -D-talose and D-galactose
<b>Cyclizations of Dialdehydes with Nitromethane. VIII.</b><sup>1</sup> <b>A Spontaneous Epimerization in <b><i>aci</i></b>-Nitro Glycosides and its Significance in the Preparation of Derivatives of 3-Amino-3-deoxy-D-mannose, -D-glucose, -D-talose and D-galactose</b>
作者:Hans Helmut. Baer
DOI:10.1021/ja00860a020
日期:1962.1
Structure and reactions of amino- and nitro-heptoseptanosides obtained by cyclization of dialdehydes with nitromethane
作者:Jacques Defaye、Andrée Gadelle、Florence Movilliat、Robert Nardin、Hans H. Baer
DOI:10.1016/0008-6215(91)84051-f
日期:1991.6
stability of epimeric nitroheptoseptanosides obtained in the reaction. Conformational preferences for nitroheptoseptanosides, as inferred from 1 H-n.m.r. data, are discussed. Comparative NaIO 4 oxidations were performed on methyl 4,6,- O -benzylidene-β- D -glucopyranoside ( 43 ) resulting in the formation of the corresponding C-2C-3 dialdehyde 44 isolated as its 2-ethyl hemialdal 45 . Base-catalyzed nitromethane