Synthesis of phosphocholine and quaternary amine ether lipids and evaluation of in vitro antineoplastic activity
作者:Susan L. Morris-Natschke、Fatma Gumus、Canio J. Marasco、Karen L. Meyer、Michael Marx、Claude Piantadosi、Matthew D. Layne、Edward J. Modest
DOI:10.1021/jm00066a011
日期:1993.7
methyl decreased activity slightly. In the nonphosphorus compounds, many nitrogen heterocycles and also a sulfonium moiety were incorporated without changing the degree of activity; however, a thiazolium group decreased activity. The most active compound, 29 [N-[3-(hexadecyloxy)-2-methoxypropyl]-3-(hydroxymethyl)pyridinium bromide], was approximately twice as active as the reference standard, ET-18-OMe
The present invention relates to a process for the production of polyacrylonitrile by polymerisation of a reaction mixture comprising acrylonitrile in a solution where the solvent is a eutectic system comprising a quaternary ammonium compound and a hydrogen donor. Such process allows for the production of a polyacrylonitrile having a desirably high molecular weight, whilst polymerisation time is reduced, and where the solvents are environmentally benign, biodegradable and may be reused in the polymerisation process.
Synthesis, self-aggregation and biological properties of alkylphosphocholine and alkylphosphohomocholine derivatives of cetyltrimethylammonium bromide, cetylpyridinium bromide, benzalkonium bromide (C16) and benzethonium chloride
A series of alkylphosphocholine and alkylphosphohomocholine derivatives of cetyltrimethylammonium bromide, cetylpyridinium bromide, benzalkonium bromide (C16) and benzethonium chloride have been synthesized. Their physicochemical properties were also investigated. The critical micelle concentration (cmc), the surface tension value at the cmc (gamma(cmc)) and the surface area at the surface saturation per head group (A(cmc)) were determined by means of surface tension measurements. The prepared compounds exhibit significant cytotoxic, antifungal and antiprotozoal activities. Alkylphosphocholines and alkylphosphohomocholines possess higher antifungal activity against Candida albicans in comparison with quaternary ammonium compounds in general. However, quaternary ammonium compounds exhibit significantly higher activity against human tumor cells and pathogenic free-living amoebae Acanthamoeba lugdunensis and Acanthamoeba quina compared to alkylphosphocholines. The relationship between structure, physicochemical properties and biological activity of the tested compounds is discussed. (C) 2013 Elsevier Masson SAS. All rights reserved.
Conformation of Some Acetylcholine Analogs as Solutes in Deuterium Oxide and Other Solvents
作者:A.F. Casy、M.M.A. Hassan、E.C. Wu
DOI:10.1002/jps.2600600112
日期:1971.1
Simons, Biochemical Journal, 1941, vol. 35, p. 749,751