✦ LIBER ✦

Syntheses and Comparison of 2,6-Di-O-methyl Celluloses from Natural and Synthetic Celluloses

✍ Scribed by Hiroshi Kamitakahara; Andreas Koschella; Yuji Mikawa; Fumiaki Nakatsubo; Thomas Heinze; Dieter Klemm

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 286 KB
Volume: 8
Category: Article
ISSN: 1616-5187
DOI: 10.1002/mabi.200700291

No coin nor oath required. For personal study only.

✦ Synopsis

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.

magnified image

📜 SIMILAR VOLUMES

Comparison of the separation of aziridin

Comparison of the separation of aziridine isomers applying heptakis(2,3-di-O-methyl-6-sulfato)β-CD and heptakis(2,3-di-O-acetyl-6-sulfato)β-CD in aqueous and nonaqueous systems

✍ Yaser Bitar; Björn Degel; Tanja Schirmeister; Ulrike Holzgrabe 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 204 KB

Syntheses of l-rubranitrose (2,3,6-tride

Syntheses of l-rubranitrose (2,3,6-trideoxy-3-C-methyl-4-O-methyl-3-nitro-l-xylo-hexopyranose) and the naturally occurring d enantiomer

✍ John S. Brimacombe; Khandker M.M. Rahman 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 132 KB

ChemInform Abstract: Synthesis of 2,3-Un

ChemInform Abstract: Synthesis of 2,3-Unsaturated 4-Amino Sugars and Cyclohexyl 2,3-Di-O-acetyl-4,6-di-O-methyl-α-D-mannopyranoside from Cyclohexyl 4,6-Di-O-acetyl-2,3-dideoxy-α-D-erythro-hex-2-enopyranoside.

✍ Tania M. B. de Brito; Ladjane P. da Silva; Valdenis L. Siqueira; R. M. Srivastav 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

ChemInform Abstract: Total Syntheses of

ChemInform Abstract: Total Syntheses of Three Natural Products, Vignafuran, 2-(4-Hydroxy-2-methoxyphenyl)-6-methoxybenzofuran-3-carboxylic Acid Methyl Ester, and Coumestrol from a Common Starting Material.

✍ Kou Hiroya; Naoyuki Suzuki; Akito Yasuhara; Yuya Egawa; Atsushi Kasano; Takao Sa 📂 Article 📅 2001 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views