Syntheses and comparison of 2,6-di-O-methyl celluloses from natural and synthetic celluloses

被引：30

作者：

Kamitakahara, Hiroshi ^{[2
]}

Koschella, Andreas ^{[3
]}

Mikawa, Yuji ^{[2
]}

Nakatsubo, Fumiaki ^{[2
]}

Heinze, Thomas ^{[3
]}

Klemm, Dieter ^{[1
]}

机构：

[1] Univ Jena, Transfer Grp Polymet, D-07745 Jena, Germany

[2] Kyoto Univ, Grad Sch Agr, Sakyo Ku, Kyoto 6068502, Japan

[3] Univ Jena, Ctr Excellence Polysaccharide Res, D-07743 Jena, Germany

来源：

MACROMOLECULAR BIOSCIENCE | 2008年 / 8卷 / 07期

关键词：

cellulose; NMR; regioselective substitution; ring-opening polymerization; solubility;

D O I：

10.1002/mabi.200700291

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 [生物化学与分子生物学]; 081704 [应用化学];

摘要：

2,6-Di-O-methylcellulose was prepared from natural and synthetic celluloses. Natural cellulose was converted to 2,6-di-O-thexyldimethylsilylcellulose, then to 3-mono-O-allyl-2,6-di-O-methylcellulose, and finally into 2,6-di-O-methylcellulose. Alternatively, 2,6 di-O-methyl-cellulose was synthesized from the synthetic cellulose derivative 3-mono-O-benzyl-2,6-di-O-pivaloylcellulose by depivaloylation and methylation to give 3 -mono-O-benzyl-2,6-di-O-methylcellulose, which was debenzylated to yield the dimethyl ether. Both types of 2,6-di-O-methylcellulose are insoluble in water and common organic solvents. The structures of all cellulose derivatives were determined by NMR.

引用

页码：690 / 700

页数：11

共 18 条

[1]

DETERMINATION OF THE SUBSTITUTION PATTERNS OF CELLULOSE METHYL ETHERS BY HPLC AND GLC - COMPARISON OF METHODS [J].