Solid state reactions of nitrogenous heterocyclic compounds(Ⅰ)——Solid state reactions of 3-methyl-l-phenyl-5-pyrazolone with carbonyl compounds

<正> The solid state reaction of 3-methyl-1-phenyl-5-pyrazolone (MPP) with aromatic aldehydes and ke-tones benzil derivatives and imides,and the solid state Michael addition reaction of MPP with 4-arylidene-3-methyl-1-phenyl-5-pyrnzolone 2 were investigated.Some new solid state reactions between the reactants were found,from which a series of new compounds were obtained The structures of the products were identified by IR,1H NMR,MS,elemental analyses and also by X-ray crystal analysis,and the reaction mechanism of MPP with aromatic aldehydes and ketones was proposed

Organic Synthesis in Ionic Liquids: Condensation of 3-Methyl-1-phenyl-5-pyrazolone with Carbonyl Compounds Catalyzed by Ethylenediammonium Diacetate (EDDA)

An efficient and environmental benign method is reported for the condensation of 3-methyl-1-phenyl-5-pyrazolone with carbonyl compounds in ionic liquids [Bmim]BF4 and [Bmim]PF6 catalyzed by ethylenediammonium diacetate.

Solid State Synthesis and Crystal Structure of 3-Methyl-1-phenyl-4-phenylbenzoylmethylene-5-pyrazolone

The solid state thermal reaction of benzil with 3-methyl-1-phenyl-5-pyrazolone gave the title compound 1 (C_24H_18N_2O_2) and its isomer 2. The crystal structure of the title compound has been determined by X-ray analysis. The crystal belongs to monoclinic system, space group P2_1/n, with cell parameters a = 7. 479 ( 1 ), b =16. 992(1), c=15. 165(1) A , β= 100. 99(1)°, V= 1891. 9 A￣3, M_r=366. 42, Z=4, D_c= 1. 286 g/cm￣3, μ= 6. 236 cm￣-1, F(000) = 768. In the molecule of 1, benzoyl group and CO group of five-member ring are in cis-positions, the interaction of oxygen atoms leads to the noncoplanarity.

((3-(3-硅胶丙基)硫基)丙基)硫酸酯作为可回收催化剂用于合成4,4'-芳亚甲基-双(1H-吡唑-5-醇)(英文)

Sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl)ester is employed as a recyclable catalyst for the condensation reaction between aromatic aldehydes and 3-methyl-l-phenyl-5-pyrazolone. This condensation reaction was performed in ethanol under refluxing conditions giving 4,4'-alkylmethylene-bis(3-methyl-5-pyrazolones) in 74-90% yields. The heterogeneous catalyst was recycled and used in eleven runs for the reaction between benzaldehyde and 3-methyl-l-phenyl-5-pyrazolone without losing catalytic activity.

Possible Mechanism of Therapeutic Effect of 3-Methyl-l-phenyl-2-pyrazolin-5-one and Bone Marrow Stromal Cells Combination Treatment in Rat Ischemic Stroke Model

Background： The functional improvement following bone marrow stromal cells （BMSCs） transplantation after stroke is directly related to the number of engrafted cells and neurogenesis in the injured brain. Here, we tried to evaluate whether 3-methyl-1-phenyl-2-pyrazolin-5-one （MCI-186）, a free radical scavenger, might influence BMSCs migration to ischemic brain, which could promote neurogenesis and thereby enhance treatment effects after stroke. Methods： Rat transient middle cerebral artery occlusion （MCAO） model was established. Two separate MCAO groups were administered with either MC1-186 or phosphate-buffered saline （PBS） solution to evaluate the expression of stromal cell-derived factor-1 （SDF-1） in ischemic brain, and compared to that in sham group （n 5/group/time point[at 1,3, and 7 days after operation]）. The content ofchemokine receptor-4 （CXCR4, a main receptor of SDF-I） at 7 days after operation was also observed on cultured BMSCs. Another four MCAO groups were intravenously administered with either PBS, MCI-186, BMSCs （2 ×106）, or a combination of MCI-186 and BMSCs （n = 10/ group）. 5-bromo-2-deoxyuridine （BrdU） and Nestin double-immunofluorescence staining was performed to identity the engrafted BMSCs and neuronal differentiation. Adhesive-removal test and foot-fault evaluation were used to test the neurological outcome. Results： MC1-186 upregulated the expression ofSDF- 1 in ischemic brain and CXCR4 content in BMSCs was enhanced after hypoxic stimulation. When MCAO rats were treated with either MCI- 186, BMSCs, or a combination ofMCI- 186 and BMSCs, the neurologic function was obviously recovered as compared to PBS control group （P 〈 0.01 or 0.05, respectively）. Combination therapy represented a further restoration, increased the number of BMSCs and Nestin- cells in ischemic brain as compared with BMSCs monotherapy （P 〈 0.01）. The number ofengrafted-BMSCs was correlated with the density of neuronal cells in ischemic brain （r = 0.72, P 〈 0.01 ） and the improvement of foot-thult （r = 0.70, P 〈 0.0 t ）. Conclusion： MCI- 186 might promote BMSCs migration to the ischemic brain, amplify the neurogenesis, and improve the effects of cell therapy.

Solid state reaction of aromatic ketones with heteroaromatics

The solid state reactions of p-nitroacetophenone, acetyl-ferrocene with indole were catalyzed by anhydrous zinc chloride or aluminum chloride, and gave exclusively the 1:2 condensation products. The solid state condensation of aromatic ketones with 1-phenyl-3-methyl-5-pyrazolone was also investigated, and the 1:1 and 2:1 condensation products were obtained. The structures of eleven new products were determined by IR, MS, H-1 NMR and elemental analysis.

CuO–CeO_2 nanocomposite: A highly efficient recyclable catalyst for the multicomponent synthesis of 4H-benzo[b]pyran derivatives

CoO-CeO2 is reported as a highly efficient and green recyclable catalyst, for the multicomponent synthesis of 4H-benzo[b]pyran derivatives. The catalyst was synthesized by a co-precipitation method and characterized by XRD, BET specific surface area, ESEM and EDS analysis. This synthetic method provides several advantages such as simple work-up procedures, minimal amount of waste generated, short reaction time, and high yields of products.

An Efficient One-pot Synthesis of Pyrazolone Derivatives Promoted by Acidic Ionic Liquid

A new class of pyrazolone derivatives has been isolated in good to excellent yields from the 2 ： 1 condensation reaction between 3-methyl-1-phenyl-5-pyrazolone and arylaldehydes in the presence of ionic liquid [HMIM]HSO4. The compounds were characterised by their IR, NMR spectra, MS and elemental analyses. The important features of the methodology are a wide application range of substrates, higher yields and shorter reaction time.