Synthesis of novel cationic lipids with oxyethylene spacers at the linkages between hydrocarbon chains and pseudoglyceryl backbone
摘要:
Four novel cationic lipids with oligo-oxyethylene units at various linkage regions between the pseudoglyceryl backbone and the hydrocarbon chains have been synthesized. The membrane-forming properties of these new lipids are briefly presented. (C) 1999 Elsevier Science Ltd. All rights reserved.
In one aspect, the present disclosure provides compounds of formulae (I) and (II). In another aspect, a compound of formula (I) or (II) is formulated into compositions with an antigen, optionally with a vesicle. In some embodiments, compositions are administered intramuscularly.
[EN] LOW VISCOSITY, LOW VOLATILITY LUBRICATING OIL BASESTOCKS<br/>[FR] HUILES DE BASE LUBRIFIANTES À BASSE VISCOSITÉ, BASSE VOLATILITÉ
申请人:EXXONMOBIL RES & ENG CO
公开号:WO2015060984A1
公开(公告)日:2015-04-30
This disclosure provides low viscosity, low volatility aryl ether compounds represented by the formula: (I) This disclosure also provides processes for producing the aryl ether compounds, lubricating oil basestocks and lubricating oils containing one or more of the aryl ether compounds, and a method for improving one or more of solubility and dispersancy of polar additives and/or sludge in a lubricating oil by using as the lubricating oil a formulated oil containing one or more of the aryl ether compounds.
length. Hexadecoxy ethoxyethyl β-d-glucopyranoside had no watersolubility at 25 °C. Decoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the toluene/water and n-octane/water systems and the strongest foaming property, whereas dodecoxy ethoxyethyl β-d-glucopyranoside had the best emulsifying property in the rapeseed oil/water system. Such β-d-glucopyranosides (n = 6-12) exhibited
chain length and increasing the number of the oligooxyethyl fragment. The critical micelle concentration had a monotonous decreasing trend with increasing the alkyl chain length. Nonyl di-/tri-/tetraoxyethyl β-d-xylopyranosides [−(OCH2CH2)m–, where m = 2, 3, and 4] exhibited the most excellent foaming ability and foam stability. In the n-octane/water system, dodecyl tetraoxyethyl β-d-xylopyranosides and
[EN] LOW VISCOSITY, LOW VOLATILITY LUBRICATING OIL BASESTOCKS<br/>[FR] HUILES DE BASE POUR HUILE LUBRIFIANTE À FAIBLE VISCOSITÉ ET FAIBLE VOLATILITÉ
申请人:EXXONMOBIL RES & ENG CO
公开号:WO2015060985A1
公开(公告)日:2015-04-30
This disclosure provides low viscosity, low volatility aryl ether compounds represented by formula (1): and represented by formula (2): wherein R1 is the same or different and is a linear or branched alkyl group having from 1 to 20 carbon atoms; R2 is the same or different and is hydrogen or an alkyl group having from 1 to 4 carbon atoms; and n is the same or different and is a value from 0 to 8. This disclosure also provides processes for producing the aryl ether compounds, lubricating oil basestocks and lubricating oils containing one or more of the aryl ether compounds, and a method for improving one or more of solubility and dispersancy of polar additives and/or sludge in a lubricating oil by using as the lubricating oil a formulated oil containing one or more of the aryl ether compounds.