Ferric tosylate

Example 6 In Situ Polymerization of EDOT using Ferric Tosylate as Oxidant... 

Example 11 Vapor-Phase Polymerization of EDOT Using Ferric Tosylate in the Presence of Polyfethylene glycol-propylene glycol-ethylene glycol) (PEG-PPG-PEG) Block Copolymer... 

Solvent-Free Chemical Polymerization [Method Gj. Typically this method of polymerization involves mixing the monomer with an excess of oxidant in a mortar and pestle followed by heating it at an elevated temperature. Ultrahigh molecular weight is obtained for poly(dihexyl-ProDOT) which is the highest reported to date for any oxidative polymerization of oxythiophenes. Various oxidants such as ferric chloride, ferric tosylate, and bromine can be used. 

A plausible mechanism for this new alkyne aza-Prins cyclization is outlined in Scheme 27. Thus, reaction of the homopropargyl tosyl amine with an aldehyde promoted by ferric halide generates the W-sulfonyl iminium ion. This intermediate evolves to the corresponding piperidine, via the vinyl carbocation. Ah initio theoretical calculations support the proposed mechanism. 

Dialkyl ethers can be cleaved by treatment with anhydrous ferric chloride in acetic anhydride.700 In this reaction both R groups are converted to acetates. Yields are moderate to high. Ethers can also be cleaved by the mixed anhydride acetyl tosylate 701... 

A mixture of epoxides 483 obtained on oxidation of 482 with dimethyldioxirane, when exposed to ferric chloride provided, as the kinetically controlled product, the a-aldehyde 484, which without purification was reduced to the a-alcohol 485. The exclusive formation of 484 is believed to occur via the benzyl cation 486, generated by Lewis-acid opening of the oxirane ring, suffering a stereospecific kinetic 1,2-hydride shift The amino alcohol 487 obtained after sequential removal of O-benzyl and N-tosyl groups from 485, on treatment with triphenylphosphine and iodine in the presence of imidazole furnished the tetracyclic base 488, which was oxidised to the ketone 489. Trapping of the kinetically generated enolate of 489 as the silylether, followed by palladium diacetate oxidation yielded the enone 490. The derived... 

An intramolecular allyl silane/N-sulfonyl iminium ion cyclization has also been used as a pivotal step in an approach to the tricyclic core of the unique marine alkaloid sarain A [46]. The starting material was aziridine ester 129 (Scheme 25) which was elaborated to amide 130. An important step in the synthetic strategy was thermolysis of 130 to an azomethine ylide, which underwent stereospecific intramolecular 1,3-dipolar cycloaddition with the Z-alkene to produce bicyclic lactam 131 [47]. This compound was then elaborated into allyl silane 132. It was then possible to replace the lactam N-benzyl functionality with a tosyl moiety, leading to 133, and subsequent reduction of the carbonyl group afforded the desired cyclization precursor a-hydroxy sulfonamide 134. Exposure of 134 to ferric chloride promoted cyclization to a single stereoisomeric tricyclic amino alkene 136 having the requisite sarain A nucleus. It is believed that the intermediate N-sulfonyl iminium ion cyclizes via the conformation shown in 135. 

Iron tersulfate. See Ferric sulfate Iron (III) toluenesulfonate CAS 77214-82-5 Synonyms Iron (III) tosylate Formula Fe(C7H7SOp3 Uses Catalyst, oxidizing agent for prod, of conductive polymers, antistatic and electrostatic coatings, capacitor electrodes, through-hole plating of printed circuit boards... 

Iron (III) tosylate. See Iron (III) toluenesulfonate Iron trichloride. See Ferric chloride Iron trichloride hexahydrate. See Ferric chloride hexahydrate Iron trinitrate. See Ferric nitrate Iron, tris (5,6-dihydro-5,6-dioxo-2-naphthalenesulfonic acid-5-oximato)-, trisodium salt. See Acid green 1 Iron, tris (dimethylcarbamodithioato-S,S )- Iron... 

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