2170-03-8Relevant articles and documents
Four component Passerini polymerization of bulky monomers under high shear flow
Barner-Kowollik, Christopher,Bui, Aaron H.,Raston, Colin L.,Truong, Vinh X.,Tuten, Bryan T.,Wiedbrauk, Sandra
, p. 8328 - 8331 (2021)
We introduce a four component Passerini polymerization utilizing sterically bulky isocyanide monomers. Under typical Passerini conditions, bulky isocyanides do not react within standard Passerini reaction timescales (hours). We overcome this challenge via the unique physiochemical conditions present in a vortex fluidic device, reducing the reaction time to 2 h on average. Under these high-shear thin-film conditions, bulky isocyanides are readily incorporated into the multicomponent polymerization without the need of high-pressure or temperature. Finally, we demonstrate that the four component approach using functional cyclic anhydrides allows for post-polymerization modification.
NMR Investigation of the Thermolysis of Citric Acid
Fischer, John W.,Merwin, Lawrence H.,Nissan, Robin A.
, p. 120 - 126 (1995)
The thermolytic decomposition of citric acid in the presence of tin/lead solder has been investigated.The solid reaction products were first examined by solid-state 13C NMR.The samples were then dissolved in D2O, and 1H and 13C 1D and 2D (HMQC, TOCSY) spectra were obtained.Results indicate the presence of a series of compounds including 3-hydroxyglutaric, citraconic, itaconic and aconitic acids, and anhydrides.Solution- and solid-state NMR data are provided for citric acid and a number of metal and alkali metal citrate salts.Results of this work are related to the use of citric acid as a solder flux and to the elimination of chlorofluorocarbon cleaning processes in the electronics industry.Index Headings: NMR; Solid-state NMR; Citric acid; Thermolysis.
New type of prototropic tautomerism involving carbon, hydrogen, and oxygen atoms
Filimoshkin,Kosolapova,Petrenko,Aksenov,Poleshchuk
, p. 462 - 466 (2004)
A low-molecular weight analog of the vinyl chloride-maleic anhydride copolymer, chloromethylsuccinic anhydride gives rise to a new type of prototropic tautomerism, cyclic anhydride-enol, with formation of quasiaromatic enol and dienol derivatives. The ratio of the anhydride and enol tautomers in solution at room temperature is 7:1.
FRAGRANCE MIXTURE
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Paragraph 0317-0319, (2020/01/24)
A fragrance mixture and its applications, in particular perfume oils, cosmetic agents, application agents or washing and cleaning agents, containing a sensory effective amount of (i) (E)-2-methyl-but-2-endicarboxylic acid diethyl ester, (ii) (Z)-2-methyl-but-2-endicarboxylic acid diethyl ester or (iii) 2-methylenebutanedicarboxylic acid diethyl ester and mixtures thereof and analogous esters derived from these compounds and mixtures.
(Re)Investigation of the reactivity of uranium hexafluoride toward several organic functions at room temperature
Roy, Olivier,Marquet, Bernard,Alric, Jean-Paul,Jourdan, Alex,Morel, Bertrand,Langlois, Bernard R.,Billard, Thierry
, p. 74 - 78 (2015/03/04)
The annual worldwide production of UF6 is very large and this compound is not used. Consequently, it could be interesting to find some applications as organic reagent. UF6 could be considered as an oxidizer of various functions. However, it seems also present some possibilities as a fluorinating reagent in mild conditions.