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Imidazoles reactions

Pyrazolo[3,4-d][l,2]diazepines synthesis, 7, 597 Pyrazolop, 4- 6][ 1,4]diazepines synthesis, 5, 272 Pyrazolo[l, 4]diazepinones as anticonvulsant, 1, 170 Pyrazolo[2,3-e]diazepinones synthesis, 5, 272 1 H-Pyrazolo[l,5-6]imidazoles synthesis, 6, 992 Pyrazolo[2,3-a]imidazoles biological activity, 6, 1024 Pyrazolo[2,3-c]imidazoles reactions, 6, 1041 synthesis, 6, 1047 Pyrazolo[2,3-imidazoles synthesis, 6, 991 Pyrazolo[3,2- njisoquinolines synthesis, 5, 339 Pyrazolop, 4-c]isoquinolines synthesis, 5, 273 Pyrazolonaphthyri dines synthesis, 5, 339 Pyrazolone, diazophotolysis, 5, 252 Pyrazolone, 4,4-dihalo-rearrangements, 5, 250 Pyrazolone, ethoxy-hydrazinolysis, 5, 253 Pyrazolone, 4-halo-... [Pg.777]

Figure 12.10 The imidazole reaction between glyoxal and arginine creates cyclic addition compounds lacking positive charge. Figure 12.10 The imidazole reaction between glyoxal and arginine creates cyclic addition compounds lacking positive charge.
All three cases involve the formation of six-membered rings, as would be expected, since the formation of five-membered rings is generally much more efficient in conformationally flexible systems. The imidazole reactions present no real problem since the reference reaction used in each case was the attack of... [Pg.195]

Since its discovery by Chandross and to this day, peroxy-oxalate chemiluminescence has been controversial because of its enormous complexity in view of the many alternative steps involved in this process. The principal mechanistic feature of the peroxy-oxalate chemiluminescence pertains to the base-catalyzed (commonly imidazole) reaction of an activated aryl oxalate with hydrogen peroxide in the presence of a chemiluminescent activator, usually a highly fluorescent aromatic hydrocarbon with a low oxidation potential . A variety of putative high-energy peroxide intermediates have been proposed for the generation of the excited states . In the context of the present chapter, it is of import to mention that recent work provides experimental evidence for the intervention of the 1,2-dioxetanedione 18 (Scheme 11) as the high-energy species responsible for the chemiexcitation. Furthermore, clear-cut experimental data favor the CIEEL mechanism as a rationalization of the peroxy-oxalate chemiluminescence . [Pg.1188]

Cloxacillin injection is assayed using the mercury-imidazole reaction in comparison with a cloxacillin standard. The sample and standard were both diluted in 500 ml of water and then 25 ml was taken from each of the solutions and was made up to 100 ml. 2 ml of the sample and standard solutions were then reacted with mercury-imidazole reagent. Froin the data below calculate the amount of cloxacillin per vial. [Pg.89]

Only one example has been reported of the potentially quite general approach of using a-bromoketones to prepare 4//-imidazoles. Reaction between a 3.5-mol excess of benzamidine and 36 (Scheme 11) gave the tetra-phenyl derivative 37 (18%). ... [Pg.421]

Figure 399 The 5 -phosphate group of oligonucleotides may be labeled with cystamine using the EDC/imidazole reaction. This results in the formation of an amine terminal spacer containing an internal disulfide group. Reduction of the disulfide provides a route to creating a free thiol for further derivatization. Figure 399 The 5 -phosphate group of oligonucleotides may be labeled with cystamine using the EDC/imidazole reaction. This results in the formation of an amine terminal spacer containing an internal disulfide group. Reduction of the disulfide provides a route to creating a free thiol for further derivatization.
When a secondary nitrogen atom is present (as in pyrrole and imidazole) reaction can occur through the dissociated anion, with formation of either the N- or the (7-substituted product. The N-substituted isomer, may, in turn, rearrange to the C-substituted one. [Pg.244]

The photolysis of 2,3-dihydro-5,6-diphenylpyrazine and related 2,3-dihydropyrazines gives imidazoles. Reaction proceeds through a diazahexatriene intermediate (196) as illustrated. The major product,... [Pg.191]

A closed-system microwave plasma reactor was used to react imidazole molecules to PVC surfaces. Newly created surfaces were analysed using ATR FTIR spectroscopy. Surface reactions on PVC were heavily dependent on a prior thermal history of the PVC substrate. A mechanism for the PVC-imidazole reactions was also presented. The PVC was useful as an implant for biomedical applications. 10 refs. [Pg.126]

Samanta SK, Kylanlahti 1, Yli-Kauhaluoma J (2005) Microwave-assisted synthesis of imidazoles reaction of p-toluenesulfonylmethyl isocyanide and polymer-bound imines. Bioorg Med Chem Lett 15 3717-3719... [Pg.55]

Reactions of amines with substituted phenyl acetates are subject to a change in pathway as a function of basicity of the leaving phenoxide group. In the ammonolysis, hydrazinolysis, and imidazole-catalyzed hydrolysis of substituted phenyl acetates, both first- and second-order terms in amine are observed (Bruice and Mayahi, 1960 Bruice and Benkovic, 1964). Out of five phenyl acetate derivatives (p-NOg, m-N02, p-H, p-Cl, and p-CHs) the general-base term kz is observed with only the least acidic leaving groups, that is p-CHs, p-H, and p-Cl in the case of ammonolysis and hydrazinolysis, and p-CHj in the case of the imidazole reaction. Uncatalyzed k terms are observed with all... [Pg.277]


See other pages where Imidazoles reactions is mentioned: [Pg.822]    [Pg.271]    [Pg.213]    [Pg.464]    [Pg.1188]    [Pg.221]    [Pg.822]    [Pg.162]    [Pg.106]    [Pg.178]    [Pg.391]    [Pg.221]    [Pg.822]    [Pg.276]    [Pg.279]    [Pg.279]    [Pg.822]    [Pg.59]    [Pg.213]    [Pg.272]    [Pg.178]    [Pg.136]   
See also in sourсe #XX -- [ Pg.166 ]




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1- Substituted imidazoles, reaction

2-Methyl-imidazoles, side-chain reactions

3- Substituted imidazole 1-oxide reactions

4- Amino-1 -substituted imidazoles reaction with anhydrides

4- Amino-1 -substituted imidazoles reaction with formates

5- Amino-4-unsubstituted imidazoles reaction with

5- Amino-imidazole-4-carbonitrile, reaction with

Acyl imidazoles, reaction with

Acyl imidazoles, reaction with ester enolates

Alkylation reactions imidazole

Benzynes, reaction with imidazoles

By Reaction between 1-Imidazoles and Electrophiles

Chichibabin reaction imidazole

Diazo-4,5-dicyano-2H-imidazole and Its Reaction Products

Epoxides reaction with imidazole

Heck reaction imidazoles

Heteroaryl Heck reaction imidazoles

Imidazol-1-sulfonate esters reactions

Imidazole 1- trimethylsilyl-, reactions

Imidazole 2 + 2]cycloaddition reactions

Imidazole Michael reactions

Imidazole carbon atom reactions

Imidazole dicarbonyl, reaction with

Imidazole dicarbonyl, reaction with acids

Imidazole in NHS ester reactions

Imidazole reaction mechanism

Imidazole reaction with electrophile

Imidazole reaction with electrophiles

Imidazole ring closure reactions

Imidazole, 2- synthesis via retro Diels-Alder reaction

Imidazole, reaction + singlet

Imidazole-2,4 -diones generation, reactions

Imidazole-4,5-dicarbaldehyde reactions

Imidazoles Diels-Alder reactions

Imidazoles Maillard reactions

Imidazoles Mannich reaction

Imidazoles addition reactions

Imidazoles cross-coupling reactions

Imidazoles reaction with

Imidazoles reaction with alkyl radicals

Imidazoles reaction with chloroform

Imidazoles reaction with dimethyl acetylenedicarboxylate

Imidazoles, 2-vinylsynthesis via retro Diels-Alder reactions

Imidazoles, cyano-, reactions

Imidazoles, diazo-, reactions

Imidazoles, l-benzyl-2-alkyl-4,5-dihydromethiodide salt reactions with organometallic compounds

Multi-component reaction , imidazole

Phenyl acetates, reaction with imidazole

Phosgene reaction with imidazole

Radziszewski Reactions (Imidazole Synthesis)

Reaction of Imidazoles, Oxazoles and Thiazoles

Reaction of imidazoles with

Sonogashira reaction imidazoles

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