The rate and equilibrium constants for the formation of a number of metmyoglobin species Mb+X (X = imidazole, imidazole-H-, 1-methylimidazole, 2-methylimidazole, 4-6 troimidazole, 2-methyl-5-nitroimidazole, pyridine, 2-, 3-, and 4-picoline) and the rates of their reduction by dithionite have been measured at 25”. Several different kinds of kinetic behavior for the reduction were observed. In al...

The use of N-methylimidazole as an efficient catalyst for the cyclization of 2′-hydroxychalcones to the corresponding flavanones in DMSO was investigated. The scope of this process was studied and various flavanones were obtained exclusively in good yields.

WT and leucine --> valine distal pocket mutants of nitrophorin 2 (NP2) and their NO complexes have been investigated by spectroelectrochemistry. NO complexes of two of the mutants exhibit more positive reduction potential shifts than does the WT protein, thus indicating stabilization of the Fe(II)-NO state. This more positive reduction potential for NP2-L132V and the double mutant is consistent...

Acylethynylpyrroles, now readily available by the cross-coupling of pyrroles with acylbromoacetylenes in solid Al2O3 media, presence 1-methylimidazole underwent unprecedentedly easy (40–45 °C) cyclodimerization into bis(acylmethylidene)dipyrrolo[1,2-a:1′,2′-d]pyrazines up to 51% yield. Some other organic and inorganic basic catalysts can also trigger this cyclodimerization, but less efficiently.

A series of pyrazolyl- and 3,5-dimethylpyrazolyl-functionalized 2-methylimidazolium-based salts have been prepared through neat reactions of 1-pyrazolylmethylene-2-methylimidazole and 1-(3,5-dimethylpyrazolylmethylene)-2-methylimidazole with alkyl or polyfluoroalkyl iodides or 1-bromohexane, followed by anion exchange with LiN(SO2CF3)2 or KPF6. Their thermal properties were determined by DSC an...

A new two-dimensional zeolitic imidazolate framework (named as ZIF-L) was synthesized in zinc salt and 2-methylimidazole (Hmim) aqueous solution at room temperature. ZIF-L (Zn(mim)2·(Hmim)1/2·(H2O)3/2 or C10H16N5O3/2Zn) has unique cushion-shaped cavities and leaf-like crystal morphology, and exhibits excellent CO2 adsorption properties.

Oligoribonucleotides have been synthesized directly from unprotected ribonucleosides by a chemical polymerization approach using phosphorus tris-azoles. The procedure involves two steps: (i) the reaction of unprotected ribonucleoside with phosphorus tris-azole and (ii) the in situ oxidation of the resulting phosphite with iodine and water. Several phosphorus tris-azoles were investigated for ge...