Stereospecific synthesis of methyl 2-amino-2-deoxy-(6S)-deuterio-α,β-D-glucopyranoside and methyl 2,6-diamino-2,6-dideoxy-(6R)deuterio-α,β-D-glucopyranoside: Side chain conformations of the 2amino-2-deoxy and 2,6-diamino-2,6-dideoxyglucopyranosides

被引:11
|
作者
Kato, Takayuki [1 ]
Vasella, Andrea [2 ]
Crich, David [1 ]
机构
[1] Wayne State Univ, Dept Chem, 5101 Cass Ave, Detroit, MI 48202 USA
[2] Swiss Fed Inst Technol, Organ Chem Lab, CH-8093 Zurich, Switzerland
关键词
Side chain conformation; Deuterium labelling; Conformational analysis; Aminosugars; PREFERRED ROTAMERS; C5-C6; BOND; DERIVATIVES; NMR; ASSIGNMENT; INHIBITORS; H-1-NMR; HEXOSES; SUGARS;
D O I
10.1016/j.carres.2017.05.015
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The stereospecifically labeled 6-monodeuterio methyl 2,6-diamino-2,6-dideoxy-alpha- and beta- o-glucopyranosides were synthesized with a view to determining their side chain conformations. NMR studies in D2O at pH 5 and pH 11 reveal both anomers to adopt very predominantly the gt conformation consistent with the gauche conformation of 2-aminoethanol and its acetate salt. In contrast, as also revealed with the help of stereospecifically-labelled monodeuterio isotopomers, the methyl 2-amino-2-deoxy-alpha- and beta- D-glucopyranosides are an approximately 1:1 mixture of gg and gt conformers as is found in glucopyranose itself. (C) 2017 Elsevier Ltd. All rights reserved.
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页码:10 / 17
页数:8
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