Acetonitrile Acetylacetone

Abbreviations acac, acetylacetonate Aik, alkyl AN, acetonitrile bpy, 2,2 -bipyridine Bu, butyl cod, 1,5- or 1,4-cyclooctadiene coe, cyclooctene cot, cyclooctatetraene Cp, cyclopentadienyl Cp, pentamethylcyclopenladienyl Cy, cyclohexyl dme, 1,2-dimethoxyethane dpe, bis(diphenyl-phosphino)ethane dppen, cis-l,2-bis(di[Atenylphosphino)ethylene dppm, bis(diphenylphosphino) methane dppp, l,3-bis(diphenylphosphino)propane eda,ethylenediamine Et,ethyl Hal,halide Hpz, pyrazole HPz, variously substituted pyrazoles Hpz, 3,5-dimethylpyrazole Me, methyl Mes, mesityl nbd, notboma-2,5-diene OBor, (lS)-endo-(-)-bomoxy Ph, phenyl phen, LlO-phenanthroline Pr, f opyl py, pyridine pz, pyrazolate Pz, variously substituted pyrazolates pz, 3,5-dimethylpyrazolate solv, solvent tfb, tetrafluorobenzo(5,6]bicyclo(2.2.2]octa-2,5,7-triene (tetrafluorobenzobanelene) THE, tetrahydrofuran tht, tetrahydrothicphene Tol, tolyl. 

Similar pyrimidine-to-pyridine conversions were also reported for purine and 8-azapurine with C-H active acetonitriles, ethyl acetoacetate, acetylacetone with dimedone 8-azapurine is converted into triazolotetra-hydroquinoline (Scheme 15) (73JCS(P1)1620, S(Pl)1625, S(P1)1794). 

Combination of nickel bromide (or nickel acetylacetonate) and A. A -dibutylnorephcdrinc catalyzed the enantioselective conjugate addition of dialkylzincs to a./Tunsaturated ketones to afford optically active //-substituted ketones in up to ca. 50% ee53. Use of the nickel(II) bipyridyl-chiral ligand complex in acetonitrile/toluenc as an in situ prepared catalyst system afforded the //-substituted ketones 2, from aryl-substituted enones 1, in up to 90% ee54. 

Iron, tris(hexafluoroacetylacetone)-structure, 1,65 Iron, tris(oxalato)-chemical actinometer, 1,409 photoreduction, 1,471 relief-image-forming systems, 6,125 Iron, tris(l,10-phenanthroline)-absorptiometry, 1,549 racemization, 1,466 solid state, 1,467 structure, 1, 64 lron(III) chloride amino acid formation prebiotic systems, 6,871 Iron complexes acetonitrile. 4,1210 acetylacetone, 2,371 amidines... 

Reaction of 1,2-glycol systems, such as in the hemiacetal sesquiterpene 1751, with Me3SiCl/NaI in acetonitrile for 5 min at ambient temperature affords more than 80% of the corresponding olefin 1752 [15, 16] (Scheme 12.4). On reacting active methylene groups such as in ethyl acetoacetate or acetylacetone with benzal-dehyde in the presence of TCS14/Nal in acetonitrile, the intermediate unsaturated ketones 1753 and 1755 are reduced to ethyl 2-benzylacetoacetate 1754 [17] or 2-benzylacetylacetone 1756 [18] in 82% and 80% yield, respectively. 

On the other hand, CH-acidic solvents such as acetylacetone, acetonitrile, nitro-methane, and dimethyl sulfoxide (Entries 25-28) yield stable crystal inclusions, each having a strict 1 1 stoichiometry. Finally, respective crystallization experiments using solvents of even less polarity or ability to form H-bonds have been carried out. The... 

These procedures were further extended to tris(acetylacetonato)technetium(III) [24]. In an acetonitrile solution of Tc(acac)3, the absorbances at the characteristic absorption maxima at 348,375,505 and 535 nm decreased with time, while an increase in the absorbance at 272 nm corresponded to an increase of free acetylacetone liberated during the substitution reaction. The final absorption spectra of the reaction mixture exhibited absorption maxima at 271,325 and 387 nm. The first order rate constant k for decomposition was found to be k = (8.86 + 0.08) x 10 4s 1at [H+] = 2.0 M at 30°C. 

The reaction of compound 98 with 1,3-dicarbonyl compounds such as ethyl acetoacetate and acetylacetone provides an easy entry to differently substituted 1,2,4-triazole derivatives 221 (Equation 25) <2004IJH241>. Analogously, the reaction of compound 98 with different nitriles such as acetonitrile, benzonitrile, and />-tolueneni-trile, in 1 2 ratio in the presence of anhydrous aluminium chloride at 160—170°C, affords the corresponding compounds 221 (Equation 25) <2004IJH241>. 

Acetone Cyanohydrin Acetonitrile Acetophenone Acetylacetone Acetylbenzene Acetyl Bromide Acetyl Chloride Acetylene... 

Acetonitrile, 407 Acetophenone, 725,729,730 phenylhydrazone, 852 p-Acetotoluidide, 593, 605 Acetoxime, 343 Acetylacetone, 861, 862, 863 Acetylation, reductive, 749 Thiele, 749 Acetyl chloride, 367 2-Acetylcyciohexanone, 862, 864 Acetylene, 245, 897 reactions of, 245, 246 Acetylenic compounds, synthesis of, 467-469, 895-902 Acetylglycine, 909 Acetylmethylurea, 968, 969 Acetylsalicylio acid, 996 Acetyl-o-toluidide, 578 2-Acetylthiophene, 837 Acid anhydrides of aliphatic carboxylic acids, 371... 

Bridged 1,5-benzodiazepines (204), prepared by condensation of o-phenyl-enediamine with 4,6-dimethylbicyclo[3.3.1]nona-3,6-diene-2,8-dione, give barbaralanes (205) on electrochemical reduction in acetonitrile in the presence of acetic anhydride338 [Eq. (119)]. The reaction is akin to the reduction of acetylacetone in which cyclopropane derivatives have been formed.339-340... 

The hydroxo complexes behave as strong bases in aqueous organic solvents and react with weak acids, including carbon acids such as nitromethane, methyl ketones, acetylacetone, acetonitrile, phenylacetylene and cyclopentadiene this provides a useful synthesis under mild conditions of platinum(II)-carbon a-bonded complexes, as exemplified in Equation 6 (18) ... 

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