CONFORMATIONAL STUDY OF A SUGAR NITROXYL FREE-RADICAL

被引：7

作者：

TRONCHET, JMJ ^{[1
]}

RICCA, A ^{[1
]}

BARBALATREY, F ^{[1
]}

GEOFFROY, M ^{[1
]}

机构：

[1] UNIV GENEVA,DEPT PHYS CHEM,CH-1211 GENEVA 4,SWITZERLAND

来源：

CARBOHYDRATE RESEARCH | 1991年 / 214卷 / 02期

关键词：

D O I：

10.1016/0008-6215(91)80031-H

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：

Ethyl2,3-dideoxy-2-isopropylamino-alpha-D-arabino-hexopyranoside N-oxyl and its 2'-d analogue have been studied by variable-temperature e.s.r. spectroscopy. At low temperature, two frozen conformers (5,a(H-2)) = 15.5 G; and 6, a(H-2) = 1.8 G) were found. Semi-empirical quantum mechanics and molecular mechanics, using specially developed parameters for hydroxylamines and nitroxyls, helped to assign an almost eclipsed geometry (O-N-C-2-C-1 approximately 10-degrees) to 5 and a compromise between a staggered and the nearest eclipsed conformation (O-N-C-2-C-1 approximately 80-degrees) to 6.

引用

页码：235 / 244

页数：10

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