title: Syntheses and comparison of 2,6-di-O-methyl celluloses from natural and synthetic celluloses.
abstract: 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-methylcellulose 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.
authors.affiliation: Graduate School of Agriculture, Kyoto University, Kitashirakawaoiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kamitakahara
authors.forename: Andreas
authors.initials: A
authors.lastname: Koschella
authors.forename: Yuji
authors.initials: Y
authors.lastname: Mikawa
authors.forename: Fumiaki
authors.initials: F
authors.lastname: Nakatsubo
authors.forename: Thomas
authors.initials: T
authors.lastname: Heinze
authors.forename: Dieter
authors.initials: D
authors.lastname: Klemm
mesh_terms: D002236:Carbohydrate Conformation; D009682:Magnetic Resonance Spectroscopy; D008747:Methylcellulose / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D008747:Methylcellulose