Dehydration of Aldoximes to Nitriles Using a Polymeric Reagent

Tamami, Bahman; Kiasat, Ali Reza

doi:10.1039/a902299f

Cited by 20 publications

(14 citation statements)

References 26 publications

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“…However, pyridine pendent group of crosslinked poly(4‐vinylpyridine) is a base so, the hydrochloric acid that is generated in the reaction is trapped by the excess of crosslinked poly (4‐vinylpyridine) and is remained bounded to the polymer after work‐up; hence regeneration of the polymer is easily accomplished by the treatment with an aqueous solution of sodium hydroxide (10%; Scheme ; Step 3). This kind of mechanism has been proposed in the reaction of thionyl chloride and poly vinylpyrolidone,55 carboxylate ions with tosyl chloride56 and synthesis of symmetrical carboxylic anhydrides from carboxylic acids 42…”

Section: Resultsmentioning

confidence: 96%

Convenient synthesis of sulfonamides from amines and p‐toluene sulfonyl chloride mediated by crosslinked poly(4‐vinylpyridine)

Zarchi

Aslani

2011

J of Applied Polymer Sci

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A general, mild, and convenient method has been developed for the synthesis of various N-substituted and N, N-disubstituted sulfonamides, as a class of sulfa drugs, from the corresponding amines and p-toluene sulfonyl chloride in the presence of readily available crosslinked poly-(4-vinylpyridine) as a catalyst, base or polymeric substrates. The use of polymeric catalyst simplifies routine sulfonylation of amines because it eliminates the traditional purification. The polymer can be removed quantitatively and it can be regenerated and reused for several cycles without losing its activity. EXPERIMENTAL ChemicalPoly(4-vinylpyridine) crosslinked with 2% divinyl benzene (100-200 mesh), [P 4 -VP], was purchased Correspondence to: M. A. Karimi Zarchi (makarimi@ yazduni.ac.ir).

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Section: Resultsmentioning

confidence: 96%

Convenient synthesis of sulfonamides from amines and p‐toluene sulfonyl chloride mediated by crosslinked poly(4‐vinylpyridine)

Zarchi

Aslani

2011

J of Applied Polymer Sci

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“…* One could in principle also prepare those polymers using cyclic trithiocarbonates, [209][210][211][212] but multifunctional RAFT agents have the advantage that the block number of the resulting multiblock polymers can be better controlled. The three used multifunctional RAFT agents ρ MB -7 , ρ MB -8 , and ρ MB -9 had already been prepared in an earlier work [243,244] by reaction of a suitable dibromide with trithiocarbonate anions on the surface of a ion-exchange resin [245,246] and fractionation of the product by rinsing the heterogeneous support system with different solvents. Their general structure is depicted in Figure 5.12.…”

Section: Multiblock Poly(n-isopropylacrylamide)mentioning

confidence: 99%

Building-block design

Ebeling

2015

Springer Theses

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In order to study AuNPs, they first have to be synthesized. As already described in Section 1.2.3.2, "gold nanoparticles" is just the umbrella term for particles with fundamentally different properties, which in particular depend on their size and the kind of stabilization and thus directly on the synthesis method. Several liquid-chemical synthesis methods were performed and surveyed regarding the suitability of the products for the envisaged functionalization experiments and the experimental ease of implementation with the accessible equipment. In this section, the results from these experiments, the characteristic properties of the produced nanoparticles and feasible analysis methods for them are discussed. In Chapter 8 "Nanohybrids of gold particles", the functionalization reactions of the synthesized AuNPs using coupling reactions on their surface, the study of their interactions with trithiocarbonate groups, and the employment in grafting-to reactions with different classes of polymers will be presented. General remarks on AuNP synthesis strategiesBecause of the high curvature, the gold atoms on the surface of AuNPs are unsaturated and especially reactive. In order to obtain a stable colloid in a AuNP synthesis, particle aggregation must be prevented. This can be achieved in three fundamentally different ways:Electrostatic stabilization: The nanoparticles carry a (remaining) charge, so that they (or the oppositely charged ligand layers) repel each other. Gold colloids stabilized in this manner are very sensitive to salts. * The list only refers to the stability of AuNPs. In order to form a colloidal solution, also a good solubility is required, which is a different matter concerning the interactions with the solvent.

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“…In Figure 1.4, three photographs of historical gold-stained [245] cubes, [246] plates, cages, [247] rosettes, [248] . .…”

Section: Gold Nanoparticlesmentioning

confidence: 99%

Section: Multiblock Poly(n-isopropylacrylamide)mentioning

confidence: 99%

Smart Nanohybrids of RAFT Polymers and Inorganic Particles

Ebeling¹

2015

Springer Theses

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The series "Springer Theses" brings together a selection of the very best Ph.D. theses from around the world and across the physical sciences. Nominated and endorsed by two recognized specialists, each published volume has been selected for its scientific excellence and the high impact of its contents for the pertinent field of research. For greater accessibility to non-specialists, the published versions include an extended introduction, as well as a foreword by the student's supervisor explaining the special relevance of the work for the field. As a whole, the series will provide a valuable resource both for newcomers to the research fields described, and for other scientists seeking detailed background information on special questions. Finally, it provides an accredited documentation of the valuable contributions made by today's younger generation of scientists.Theses are accepted into the series by invited nomination only and must fulfill all of the following criteria • They must be written in good English.• The topic should fall within the confines of Chemistry, Physics, Earth Sciences, Engineering and related interdisciplinary fields such as Materials, Nanoscience, Chemical Engineering, Complex Systems and Biophysics.

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Dehydration of Aldoximes to Nitriles Using a Polymeric Reagent

Cited by 20 publications

References 26 publications

Convenient synthesis of sulfonamides from amines and p‐toluene sulfonyl chloride mediated by crosslinked poly(4‐vinylpyridine)

Convenient synthesis of sulfonamides from amines and p‐toluene sulfonyl chloride mediated by crosslinked poly(4‐vinylpyridine)

Building-block design

Smart Nanohybrids of RAFT Polymers and Inorganic Particles

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