53481-02-0Relevant articles and documents
Synthesis and physico-chemical characterization of bolaamphiphiles derived from alkenyl d-xylosides
Deleu, Magali,Damez, Celine,Gatard, Sylvain,Nott, Katherine,Paquot, Michel,Bouquillon, Sandrine
, p. 2258 - 2266 (2011)
The two step synthesis of a new series of bolaamphiphiles derived from alkenyl d-xylosides is described. Yields between 57 and 90% have been reached. Aggregation behavior and membrane interaction properties of a particular sugar-bolaform composed of two xylose heads connected by an ether link to a hydrophobic chain comprising 18 carbon atoms and an insaturation were studied. Its CAC value (～0.05 mM) is low compared to those of conventional surfactants. Thermodynamic analysis has revealed that the aggregation phenomenon is mainly driven by an entropy process. The compound is able to interact with DPPC monolayers, in particular if their surface pressure is ≥15 mN m -1. Our results highlight the potential of this bolaamphiphile as surfactant and membrane interacting agent.
COMBINED SYNTHESIS OF A NITRILE-ESTER/ACID AND OF A DIESTER/DIACID
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Paragraph 0141-0142, (2016/03/13)
A method for the combined synthesis of a mono-unsaturated nitrile-ester(acid) and of a bi-functional carbonyl compound, wherein it includes a step including the cross metathesis mc1 of an unsaturated fatty acid/ester compound with an unsaturated nitrile compound, in which mc1 is performed with partial conversion such as to obtain and recover, separately, at least the following products: a mono-unsaturated nitrile-ester/acid and a symmetrical compound, diester or diacid respectively including a double bond located in the middle of the molecular chain of compound, and subsequently a step including the oxidation cleavage cp2 of the double bond of compound, such as to form a single type of carbonyl compound having formula R2-(CH2)n-COR′, in which R′ is H or OH, depending on the operating conditions selected for the oxidation cleavage cp2. Also, the production of monomers for the polymer industry.
CROSS METATHESIS PROCESS
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Paragraph 0200-0204, (2015/12/30)
A process for the synthesis of an unsaturated product by cross metathesis between a first unsaturated compound having at least 8 carbon atoms and a second unsaturated compound having less than 8 carbon atoms, including: feeding a reactor with the first unsaturated compound, the second unsaturated compound and a metathesis catalyst; withdrawing an output stream, at the output of the reactor; separating the output stream, making it possible to recover at least: on the one hand, the unsaturated product and, on the other hand, the first unsaturated compound and the second unsaturated compound; recycling the first unsaturated compound and the second unsaturated compound to the reactor; in which the first unsaturated compound is capable of producing an unsaturated coproduct, including at least 14 carbon atoms, by homometathesis; and in which the flow rates for feeding the reactor with first unsaturated compound and with second unsaturated compound are adjusted.
EFFECT OF REACTION CONDITIONS ON THE ACTIVITY OF THE WCl6 + (CH3)4Sn CATALYTIC SYSTEM IN THE METATHESIS OF METHYL 10-UNDECENOATE
Balcar, Hynek,Dosedlova, Alena,Petrusova, Lidmila,Matyska, Bohumir
, p. 2665 - 2669 (2007/10/02)
In contrast to published data, metathesis of methyl 10-undecenoate is found to proceed with a good yield even if the ester is present in high excess with respect to the catalyst, if the former is first reacted with WCl6 to form a complex (owing to which the reaction mixture acquires red colour), and only then the metathesis is started by adding (CH3)4Sn.Moreover, satisfactory degrees of conversion are only attained if the catalyst concentration is low enough so that the deactivation of the active centres is slowed down.
METATHESIS OF METHYL 10-UNDECENOATE
Balcar, Hynek,Dosedlova, Alena,Hanus, Vladimir,Petrusova, Lidmila,Matyska, Bohumir
, p. 1736 - 1745 (2007/10/02)
The metathesis of methyl 10-undecenoate was studied using the WCl6+(CH3)4Sn catalyst system.The rate of metathesis and the maximum degree od conversion are affected markedly by the reactions of the ester, and of other oxygen compounds if present, with tungsten hexachloride.Introduction of an oxygen ligand to the central tungsten atom of the active centre increases the reactivity and stability of the latter, thus affecting positively the initial rate of the metathesis reaction.At the same time, however, the rate of the catalyst deactivation increases with increasingconcentration of the ester, whereupon the degree of conversion decreases.As a result of competition of the two effects, a maximum appears in the dependence of the amount of the ester reacted on the ester-to-tungsten hexachloride ratio.
