2.4.5- Tris imidazolium chloride

Dimroth rearrangement, 5, 438 Imidazolium chloride, 4-chloromethyl-reaction with poly(vinyl alcohol), 1, 306 Imidazolium chloride, 2,4,5-tri(diethylamino)-reduction, 5, 415 Imidazolium complexes, 7, 746... 

Tlie desulfurization of thiono compounds is another frequently used synthetic approach for the formation of double bonds via carbenoid intermediates. By this methodology, some indigoid 1,3,5,7-tetraazafulvalenes 88 and 90 were synthesized (83BSB781 90JPR949).Tliis dimerization starting from 2,4,5-tris(dimethylamino)imidazolium chloride via the appropriate thione 87 has been realized in the presence of phosphanes or phosphites to... 

The results show that basic alkylphosphines are especially suitable. The ligand should be sterically demanding, but tri-f-butylphosphine (entry 8) is obviously too bulky. An ideal ligand seems to be tri-f-propylphosphine (entries 6 and 7). Unfortunately, the water-soluble ligands TPPMS (entries 2 and 3) and TPPTS do not work in this reaction, also the carbene ligand bis(mesitylene)imidazolium chloride (entry 12) has only a low activity. The influence of additives like maleic anhydride (MA) and 1,3-divinyltetra-methyldisiloxane (dvds) is negligible. 

Tris(diethylamino)imidazolium chloride is reduced by sodium borohydride in ethanol to the 1,3-diazacyclopentadiene (134 Scheme 63) (81TL2973). 

S-Tris(diethylamino)imidazolium chloride adds ethoxide to give the heterocyclic aminal ester (499 Scheme 9i). 6 -970 Treatment of 3-bromo-3-phenyldiazirine with methoxide at low temperatures affords the labile 3-methoxy-3-phenyldiazirine (500), which can be regarded, from its substitution pat-... 

Figure 7.21 Side view of an aluminum film on steel deposited from an ionic melt that has been formed of ethyl-methyl-imidazolium-chloride and aluminum-tri-chloride. (Reproduced with permission from Ref. [35], 2006, Elsevier.)...

Figure 2.39 NaCI desorption effect on the supported lipase (IL used was l-methyl-3-(tri-ethoxysilylpropyl)-imidazolium chloride).

An N-heterocyclic carbene ligand, formed from l,3-bis-(2,4,6-trimethylphenyl)-3//-imidazol-l-ium chloride and cesium carbonate, with dipalladium tris(dibenzylideneacetone) gave excellent yields (93-96% yields) in the Suzuki coupling of 2-chloropurines and arylboronic acids in anhydrous dioxane <2001TL8751>. The combination of an imidazolium-carbene and nickel(O) bis(cyclooctadiene) formed a catalyst capable of insertion into the C-F bond of 6-fluoropurine nucleosides (Scheme 35) <20050L1149>. 

Finally, several imidazolium-based polymers have been synthesized, including poly[3-(4-vinylbenzyl)-1 -methylimidazolium chloride and bis(tri-fiuoromethylsulfonyl)imide], and recent studies have evidenced their ability to stabilize metal nanoparticles (Figure 4.13). ... 

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