[EN] 3'-KETOGLYCOSIDE COMPOUND FOR THE SLOW RELEASE OF A VOLATILE ALCOHOL<br/>[FR] COMPOSÉ 3'-CÉTOGLYCOSIDE POUR LA LIBÉRATION LENTE D'UN ALCOOL VOLATIL
申请人:GLYCOSCIENCE S L
公开号:WO2021160670A1
公开(公告)日:2021-08-19
The present invention relates to a 3'-ketoglycoside compound defined by formula (I) and its use for controlled release of alcohols, in particular alcohols showing an insect repellent effect. It relates also to a process for preparing the 3'-ketoglycoside compound of formula (I). It further relates to a composition comprising a 3'- ketoglycoside compound of formula (I). It relates also to the use of a 3'-ketoglycoside compound of formula (I) for the controlled release of alcohols. It related also to a method of use of such composition.
Selective oxidation of primary alcohols mediated by nitroxyl radical in aqueous solution. Kinetics and mechanism
作者:Arjan E.J. de Nooy、Arie C. Besemer、Herman van Bekkum
DOI:10.1016/0040-4020(95)00417-7
日期:1995.7
The kinetics of the TEMPO-mediated oxidation of methyl α-d-glucopyranoside to sodium methyl α-d-glucopyranosiduronate were studied. An intermediate was found which was identified as the hydrated aldehyde. This was oxidised in the same manner as the alcohol, with pseudo first order rate constants ratio kobs,ald/kobs,alc — 7. The reaction mechanism is discussed with emphasis on steric factors and compared
研究了TEMPO介导的α-d-吡喃葡萄糖苷甲基氧化成α-d-吡喃葡萄糖苷神经酸钠的动力学。发现了一种中间体,该中间体被鉴定为水合醛。以与醇相同的方式将其氧化,具有伪一级速率常数比率k obs,ald / k obs,alc -7。讨论了反应机理,着重于空间因素,并与文献数据进行了比较。假定了两种不同的反应途径。在碱性反应条件下通过环状过渡态3,在酸性反应条件下通过非环状过渡态4。
Highly selective nitroxyl radical-mediated oxidation of primary alcohol groups in water-soluble glucans
作者:Arjan E.J. de Nooy、Arie C. Besemer、Herman van Bekkum
DOI:10.1016/0008-6215(94)00343-e
日期:1995.4
(HPAEC). The optimum pH for the reaction was between 10 and 11. The oxidation was found to be first order in TEMPO and Br-. The oxidation method can be applied to determine the amount of primaryalcoholgroups in water-soluble glucans; for pullulan, a proportion of 70% and for dextran, a proportion of 3% primaryalcoholgroups was found.
Oxidation of sucrose by the NaOCl/TEMPO system provided sucrose tricarboxylate without the addition of sodium bromide as co-catalyst when high-frequency (500 kHz) ultrasound was applied, in contrast to very limited conversion without sonication. In the presence of sodium bromide, sonication also caused acceleration of the oxidation. The rate increase due to sonication of the oxidant system prior to sucrose addition suggests that ultrasound acts at the level of the formation of the nitrosonium ion, the active oxidising species in the catalytic cycle. (C) 2000 Elsevier Science Ltd. All rights reserved.
Improved Synthesis of Sodium Alkyl-Glucopyranuronates
作者:J. Fabre、D. Betbeder、F. Paul、P. Monsan
DOI:10.1080/00397919308011223
日期:1993.5
Methyl and butyl-alpha-D-glucopyranoside were oxidised by use of Adams' catalyst in lower pH values (6-7) than previously reported, yielding 97% of the corresponding sodium uronate form. Water purity was seen to influence yield.