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Catalyst‐Free Synthesis of Alkylpolyglycosides Induced by High‐Frequency Ultrasound
Author(s) -
Amaniampong Prince Nana,
Clément JeanLouis,
Gigmes Didier,
Ortiz Mellet Carmen,
García Fernández José M.,
Blériot Yves,
Chatel Gregory,
De Oliveira Vigier Karine,
Jérôme François
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801137
Subject(s) - chemistry , polymerization , catalysis , degradation (telecommunications) , high frequency ultrasound , glycosylation , alkyl , in situ , ultrasound , organic chemistry , chemical engineering , biochemistry , polymer , physics , computer science , acoustics , engineering , telecommunications
The irradiation of concentrated feeds of carbohydrates in alcoholic solution by high‐frequency ultrasound (550 kHz) induces the formation of alkylpolyglycosides (APGs). This work is distinct from previous reports in that it does not involve any (bio)catalyst or activating agent, it takes place at only 40 °C, thus avoiding degradation of carbohydrates, and it selectively yields APGs with a degree of polymerization in a window of 2–7, an important limitation of the popular Fischer glycosylation. This ultrasound‐based technology proved successful with a range of different valuable carbohydrates and alkyl alcohols. The elucidation of the structure of all the produced glycosides strongly suggests that 1,6‐anhydrosugars formed in situ are key intermediate species.