Direct synthesis of 1,6-anhydro sugars from unprotected glycopyranoses by using 2-chloro-1,3-dimethylimidazolinium chloride
摘要:
Various 1,6-anhydro sugars have been synthesized directly from the corresponding unprotected glycopyranoses in excellent yields by using 2-chloro-1,3-dimethylimidazolinium chloride (DMC) as a dehydrative condensing agent. The reactions took place smoothly under mild reaction conditions in aqueous media. The present method would be a practical tool for synthesis of 1,6-anhydro derivatives of mono-saccharides, linear-oligosaccharides, and branched-oligosaccharides. (C) 2009 Elsevier Ltd. All rights reserved.
Mass Spectrometric Studies of Fast Pyrolysis of Cellulose
作者:John C. Degenstein、Matt Hurt、Priya Murria、McKay Easton、Harshavardhan Choudhari、Linan Yang、James Riedeman、Mark S. Carlsen、John J. Nash、Rakesh Agrawal、W. Nicholas Delgass、Fabio H. Ribeiro、Hilkka I. Kenttämaa
DOI:10.1255/ejms.1335
日期:2015.6
A fast pyrolysis probe/linear quadrupole ion trap mass spectrometer combination was used to study the primary fast pyrolysis products (those that first leave the hot pyrolysis surface) of cellulose, cellobiose, cellotriose, cellotetraose, cellopentaose, and cellohexaose, as well as of cellobiosan, cellotriosan, and cellopentosan, at 600°C. Similar products with different branching ratios were found