Synthesis of Dipolar Ethyleneimidazolium Benzimidazolate Inner Salts and Their Transformation to 2-Vinylbenzimidazoles through a Type of b-Elimination Reaction
摘要:
The synthesis and spectroscopic properties of the fairly stable title inner salts (5) are reported. For several of the betaines (5), both the highly dipolar character due to the terminal rings and the nature of the spacer promoted a type of beta-elimination reaction. Thus, formation of 2-vinylbenzimidazoles (7) from the corresponding betaines (5) proceeds in high yield under neutral and mild conditions. Following similar treatment, the 1-(2-benzimidazol-2-ylethyl)imidazolium salt (8b) undergo nucleophilic substitution reactions.
The invention relates to a process for preparing haloalkanes by reaction of alcohol with hydrogen halide, wherein the reaction of the alcohol with the hydrogen halide occurs in the presence of an ionic liquid at a temperature which is above 100° C. for at least part of the time and, at least at the time of the commencement of the reaction, the water content is not more than 25 mol % based on the amount of liquid, where the ionic liquid is not octyltrimethylammonium chloride.
ONE POT MULTICOMPONENT SYNTHESIS OF SOME NOVEL HYDROXY STILBENE DERIVATIVES WITH ALPHA, BETA-CARBONYL CONJUGATION UNDER MICROWAVE IRRADIATION
申请人:Sharma Abhishek
公开号:US20120165567A1
公开(公告)日:2012-06-28
The present invention provides a method for the preparation of some novel multiconjugated 2- or 4-hydroxy substituted stilbenes. The method provides one pot multicomponent approach wherein 3-4 step reaction sequences viz. condensation, decarboxylation and Heck coupling occur simultaneously which results in an enhanced yield of desired products and reduced reaction times
Azolium Ionomer Derivatives of Halogenated Polymers
申请人:Parent J. Scott
公开号:US20120157579A1
公开(公告)日:2012-06-21
Nucleophilic substitution reactions of halogenated polymers and azoles are used to produce derivatives of polyolefins bear pendant azolium ionomers. These uncured ionomers are useful in adhesive, antimicrobial applications, as well as in polymer composites and polymer blends. Furthermore, these azolium ionomers' ion pairs can bear reactive functionality, which provides access to further reactions that were unavailable using previous technology. Advantageously, such reactive ionomer derivatives of polyolefins can be cured by free radical and moisture-curing chemistry that was unaccessible to the halogenated polymer parent material.
VERFAHREN ZUR HERSTELLUNG VON HALOGENALKANEN AUS ALKOHOLEN
申请人:BASF Aktiengesellschaft
公开号:EP1663921A2
公开(公告)日:2006-06-07
OLIGOMER FUNCTIONALIZED NANOTUBES AND COMPOSITES FORMED THEREWITH
申请人:Zettl Alexander K.
公开号:US20120088934A1
公开(公告)日:2012-04-12
Disclosed herein is a sequential functionalization methodology for the covalent modification of nanotubes with between one and four repeat units of a polymer. Covalent attachment of oligomer units to the surface of nanotubes results in oligomer units forming an organic sheath around the nanotubes, polymer-functionalized-nanotubes (P-NTs). P-NTs possess chemical functionality identical to that of the functionalizing polymer, and thus provide nanoscale scaffolds which may be readily dispersed within a monomer solution and participate in the polymerization reaction to form a polymer-nanotube/polymer composite. Formation of polymer in the presence of P-NTs leads to a uniform dispersion of nanotubes within the polymer matrix, in contrast to aggregated masses of nanotubes in the case of pristine-NTs. The covalent attachment of oligomeric units to the surface of nanotubes represents the formation of a functional nanoscale building block which can be readily dispersed and integrated within the polymer to form a novel composite material.