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Synthesis of trifluoromethyl ethers and ..

SYNTHESIS AND CHARACTERIZATION OF POLYIMIDES BASED ON PHENYL ETHER TYPE TRIFLUROMETHYLCONTAINING DIAMINES[J].

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TRIFLUOROMETHYL METHYL ETHER CAS#: 421-14-7

nitrophenoxy)-4-(trifluoromethyl)benzene 2,4'-Dinitro-4-(trifluoromethyl) diphenyl ether Properties of current ...

4-fluorophenyl trifluoromethyl ether | C7H4F4O - …

4-Dinitro-p-trifluoromethyl phenyl ether; 2,4'-Dinitro-4-(trifluoromethyl)diphenyl ether; 4-Nitrophenyl 4-(trifluoromethyl)-2-nitrophenyl ether ...

Ethyl trifluoromethyl ether | VWR

Three bis(trifluoromethyl) dinitrobiphenyls were prepared by heating chloro- or iodo-nitrobenzotrifluorides with copper in DMF. Three bis (trifluoromethyl)-dinitrodiphenyl ethers were obtained by the reactions of chloronitrobenzotrifluorides with alkali Metal carbonates in aprotic solvents.
The dinitro compounds were reduced by tin and hydrochloric acid to give the corresponding diamino derivatives.
The diisocyanates, 3, 3'-(CF0)2-4, 4'-(NCO)2- and 2, 2'-(CF0)2-4, 4'-(NCO)2-biphenyl, 3, 3'-(CF3)2- 4, 4'-(NC0)2-, 2, 2-(CF3)2-4, 4'-(NCO)2- and 4, 4'-(CF0)2-2, 2'-(NCO)2-diphenyl ether, were obtained by the reactions of the amine derivatives with phosgen in glyme.

In a three-neck flask with a volume of 1 l, equipped with a magnetic stirrer, a bubbler, a thermometer, a reflux condenser connected to a direct fridge, an outlet, with the flask Tishchenko with conc. H2SO4output and the receiving flask, 150 g (0,79 mol) of trimethyl(trichloromethyl)silane and 250 ml of p-chlorobenzotrifluoride with stirring dropwise added to 23.5 g patalastas antimony. The reaction mass is heated to 110°C, and then through a bubbler fed dry HF, at the same time collecting the product in the receiving flask. Distillate ratifitsiruete and 89 g of trimethyl(trifluoromethyl)silane as a colorless liquid purity by GC and 19F NMR spectra of 99%. The yield of 80%.

2-Iodotetrafluoroethyl trifluoromethyl ether | CAS 1561 …

As the solvent used may be inert fluorinated compound with a boiling point above 100°C, for example n-chlorobenzotrifluoride or octopetala. Fluoridation of trimethyl(trichloromethyl)silane occurs by heating it, or its solution in fluorinated compound with antimony TRIFLUORIDE, the activated compound of pentavalent antimony - SbCl5or produced in situ by interaction of antimony TRIFLUORIDE and bromine SbBr2Cl3or by passing into the solution gaseous �Tolstogo hydrogen in the presence patalastas antimony. The resulting product is distilled off from the reaction mixture as it is educational. Source trimethyl(trichloromethyl)silane is available reagent. The described method it is received by the decarboxylation trimethylsilyl ether trichloroacetic acid in tetrahydrofuran in the presence of triethylamine (Synthesis No. 8 (1980), p. 626-627).

This problem is solved by the proposed method obtain trimethyl(trifluoromethyl)silane interaction of trimethyl(trichloromethyl)silane with a fluorinating agent selected from the range: antimony TRIFLUORIDE, activated bromine or patalastas antimony, or gaseous hydrogen fluoride, and the interaction is carried out by heating or in an inert fluorinated solvent, or without solvent. Source trimethyl(trichloromethyl)silane can be easily obtained by decarboxylation trimethylsilyl ether trichloroacetic acid, resulting in turn in high yield from trichloroacetic acid or its sodium salt.

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Ester synthesis by O-alkylation - Organic chemistry

α-Trifluoromethyl allenol ethers 9a-e were prepared in moderate to good yields by the Julia-Lythgoe process using β-ethoxy-β-trifluoromethyl vinylic sulfone 3. Several reactions of 9c were examined to give α, β-unsaturated trifluoromethyl ketone derivatives 11 and 12.

Dimethylcarbonate is a nontoxic and green methylating reagent

AB - The reactions of α,β-unsaturated aldehydes with cyclopentadiene in the presence of diarylprolinol silyl ethers as catalyst proceed via iminium cations as intermediates, and can be divided into two types; one involving a Michael-type reaction (type A) and one involving a cycloaddition (type B). Diphenylprolinol silyl ethers and trifluoromethyl-substituted diarylprolinol silyl ethers, which are widely used proline-type organocatalysts, have been investigated in this study. As the LUMO of the iminium ion derived from trifluoromethyl-substituted diarylprolinol silyl ether is lower in energy than that derived from diphenylprolinol silyl ether, as supported by ab initio calculations, the trifluoromethyl-substituted catalyst is more reactive in a type B reaction. The iminium ion from an α,β-unsaturated aldehyde is generated more quickly with diphenylprolinol silyl ether than with the trifluoromethyl-substituted diarylprolinol silyl ether. When the generation of the iminium ion is the rate-determining step, the diphenylprolinol silyl ether catalyst is the more reactive. Because acid accelerates the generation of iminium ions and reduces the generation of anionic nucleophiles in the Michael-type reaction (type A), it is necessary to select the appropriate acid for specific reactions. In general, diphenylprolinol silyl ether is a superior catalyst for type A reactions, whereas the trifluoromethyl-substituted diarylprolinol silyl ether catalyst is preferred for type B reactions.

Synthesis of Phenols - Organic Chemistry Portal

It is known that trimethyl(trifluoromethyl)silane is produced by interaction of triptoreline or triftormetilfullerenov with metals in the presence similarbuy agents trimethylchlorosilane, trimethylsilyl ester trifluoroacetic acid, etc., trimethyl(trifluoromethyl)silane obtained by reacting BROMOTRIFLUOROMETHANE with trimethylchlorosilane in the presence of aluminum in N-methylpyrrolidone (Synlett; 1995. No. 6 p. 641).

Nomenclature and classification

N2 - The reactions of α,β-unsaturated aldehydes with cyclopentadiene in the presence of diarylprolinol silyl ethers as catalyst proceed via iminium cations as intermediates, and can be divided into two types; one involving a Michael-type reaction (type A) and one involving a cycloaddition (type B). Diphenylprolinol silyl ethers and trifluoromethyl-substituted diarylprolinol silyl ethers, which are widely used proline-type organocatalysts, have been investigated in this study. As the LUMO of the iminium ion derived from trifluoromethyl-substituted diarylprolinol silyl ether is lower in energy than that derived from diphenylprolinol silyl ether, as supported by ab initio calculations, the trifluoromethyl-substituted catalyst is more reactive in a type B reaction. The iminium ion from an α,β-unsaturated aldehyde is generated more quickly with diphenylprolinol silyl ether than with the trifluoromethyl-substituted diarylprolinol silyl ether. When the generation of the iminium ion is the rate-determining step, the diphenylprolinol silyl ether catalyst is the more reactive. Because acid accelerates the generation of iminium ions and reduces the generation of anionic nucleophiles in the Michael-type reaction (type A), it is necessary to select the appropriate acid for specific reactions. In general, diphenylprolinol silyl ether is a superior catalyst for type A reactions, whereas the trifluoromethyl-substituted diarylprolinol silyl ether catalyst is preferred for type B reactions.

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