- Fine-tuning the morphology of self-assembled nanostructures of propargyl ammonium-based amphiphiles
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N-Methyl-N-(pentacosa-10,12-diyn)-propargylamine organizes itself into an unusual supramolecular pH- and thermo-responsive system. Studies have showed that submillimetric length hollow laths form this unique structure in the presence of hydrochloric acid. Specific chemical modifications on the initial molecule and small-angle neutron scattering experiments were performed to understand the structure of this system. Our results allow us to suggest a possible structure of the laths.
- Morin, Emmanuelle,Guenet, Jean-Michel,Díaz, David D.,Remy, Jean-Serge,Wagner, Alain
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experimental part
p. 12495 - 12500
(2011/02/27)
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- Synthesis of threitol ceramide and [14C]threitol ceramide, non-glycosidic analogues of the potent CD1d antigen α-galactosyl ceramide
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The synthesis of threitol ceramide, which is a non-glycosidic analogue of the potent CD1d antigen α-galactosyl ceramide, is described. The synthesis of a 14C-labelled threitol ceramide analogue is also presented. This radiolabelled analogue wil
- Garcia Diaz, Yoel R.,Wojno, Justyna,Cox, Liam R.,Besra, Gurdyal S.
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experimental part
p. 747 - 753
(2009/09/25)
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- Pterocarpan, phenol and lipid constituents from Butea monosperma stem
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In addition to stigmasterol-3-αL-arabinopyranoside, four new compounds isolated from the stems of Butea monosperma have been characterized as 3-methoxy-8, 9-methylenedioxypterocarp-6-ene, 21-methylene-22-hydroxy-24-oxooctacosanoic acid methyl ester, 4-pentacosanylphenol and pentacosanyl-β D-glucopyranoside by spectral data and chemical studies.
- Shukla,Mishra, Mamta,Kumar, Sushil
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p. 1283 - 1285
(2007/10/03)
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- Synthesis of the enantiomers of some methyl-branched cuticular hydrocarbons of the ant, Diacamma sp.
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The enantiomers of 3-methylpentacosane, 3-methylheptacosane, 3-methylnonacosane, 13-methylheptacosane, and 5-methylheptacosane were synthesized by starting from the enantiomers of 2-methylbutyl bromide or citronellol. These methyl-branched alkanes are the characteristic components of the cuticular hydrocarbons of queen of the ant, Diacamma sp.
- Marukawa, Kaoru,Takikawa, Hirosato,Mori, Kenji
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p. 305 - 314
(2007/10/03)
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- Hair growth composition containing citric acid esters
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Triesters of citric acid are used for inducing, maintaining or increasing hair growth. Compositions for topical application to mammalian hair or scalp comprise an effective amount of from 1% to 99% by weight of an ester of citric acid having the structure (1): where, R1, R2 and R3 each independently represent a branched or unbranched alkyl, alkenyl, aryl, alkylaryl or arylalkyl group, each said group having from 1 to 18 carbon atoms, R4 represents -H, or a branched or unbranched saturated or unsaturated acyl, alkyl, aryl, alkylaryl or aylalkyl group having from 1 to 18 carbon atoms, in the presence of a cosmetically acceptable vehicle for the citric acid ester and in the absence of solid absorbent for the ester;, said effective amount of said ester being sufficient to increase hair growth in the rat, when said composition is applied topically thereto over a period of no more than three months, by at least 10% more than that obtainable using a control composition from which the said ester has been omitted, in accordance with the Rat Hair Growth Test.
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- A New Synthesis of Long Chain Acid Esters and Carbinols
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A versatile synthesis of difficulty accessible long chain acid esters and carbinols is described.The synthesis involves acylations at 2- and 5-positions of thiophene.Thioketalation of the resulting ketoesters followed by Raney nickel desulfurization yield acid esters which on LAH reduction give the corresponding carbinols.
- Rao, S. Jagadishwar,Bhalerao, U. T.,Tilak, B. D.
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p. 208 - 211
(2007/10/02)
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