DISSOLUTION OF CELLULOSE IN LITHIUM BROMIDE ORGANIC-SOLVENT SYSTEMS AND HOMOGENEOUS BROMINATION OF CELLULOSE WITH N-BROMOSUCCINIMIDE TRIPHENYLPHOSPHINE IN LITHIUM BROMIDE N,N-DIMETHYLACETAMIDE

被引：75

作者：

FURUHATA, KI ^{[1
]}

KOGANEI, K ^{[1
]}

CHANG, HS ^{[1
]}

AOKI, N ^{[1
]}

SAKAMOTO, M ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,FAC ENGN,DEPT ORGAN & POLYMER MAT,MEGURO KU,TOKYO 152,JAPAN

来源：

CARBOHYDRATE RESEARCH | 1992年 / 230卷 / 01期

关键词：

D O I：

10.1016/S0008-6215(00)90519-6

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：

Three solvent systems, namely lithium bromide in N,N-dimethvlacetamide (DMA). N-methyl-2-pyrrolidone, or N,N-dimethylformamide, are able to dissolve cellulose. No appreciable decrease in molecular weight of cellulose was observed during the dissolution into the LiBr-DMA solvent system. The homogeneous bromination of cellulose with N-bromosuccinimide-triphenylphosphine in LiBr-DMA proceeded smoothly, and the degree of substitution by bromine of 0.9 was attained under appropriate conditions. Only the 6-hydroxyl groups were replaced with bromine, even for the sample having the highest degree of substitution. The effects of reaction conditions on the degree of substitution were studied in detail.

引用

页码：165 / 177

页数：13

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