Neuroleptic activity and dopamine-uptake inhibition in 1-piperazino-3-phenylindans
摘要:
A series of 1-piperazino-3-phenylindans was synthesized and tested for neuroleptic and thymoleptic activity. Neuroleptic activity was found only in trans racemates and was associated with one of the enantiomers only. The potent and long-acting neuroleptic compound trans-4-[3-(4-fluorophenyl)-6-(trifluoromethyl)indan-1-yl]-1-piperazineethanol (Lu 18-012, tefludazine) was developed by systematic variation of structural components. Thymoleptic activity was optimized, especially with respect to dopamine-uptake inhibition. No geometrical stereoselectivity was found with regard to dopamine-uptake inhibition, but a high enantioselectivity could be demonstrated for both cis and trans racemates. The most potent compounds were 1-piperazino-3-(3,4-dichlorophenyl)indans with IC50 values of about 2nM for inhibition of dopamine uptake.
使用傅立叶变换红外光谱,热重分析,X射线衍射,扫描电子显微镜,能量分散X射线成功地合成并表征了作为溴源负载在磁性纳米颗粒(Br 3 TBA-Fe 3 O 4)上的三溴化三苄基铵光谱学和振动样品磁力计。合成的催化剂显示出是一种通用且高效的非均相催化剂,可用于Knoevenagel缩合以及2,3-二氢喹唑啉-4(1 H)-one和多氢喹啉衍生物的合成。据作者所知,这是首次使用固定在Fe 3 O 4上的溴源的报道。纳米颗粒可作为这些反应的磁性分离催化剂。纳米固体催化剂可以被磁回收并容易地重复使用几次,而不会显着降低催化效率。
octane (DABCO)-catalyzed Knoevenagel condensation reactions, which showed better catalytic activity compared to other ionic liquid (IL) that had no hydroxyl group attached to the IL scaffold. The effect of hydrogen bond formation between the hydroxyl group of [HyEtPy]Cl and the carbonyl group of aldehyde played an important role in the Knoevenagel condensation reaction. In the [HyEtPy]Cl–H2O–DABCO
Synthesis and characterization of sulfamic acid supported on Fe<sub>3</sub>
O<sub>4</sub>
nanoparticles: A green, versatile and magnetically separable acidic catalyst for oxidation reactions and Knoevenagel condensation
Sulfamic acid immobilized on diethylenetriamine functionalized Fe3O4 nanoparticles (SA‐DETA‐Fe3O4) was successfully prepared and characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), vibrating sample magnetometer (VSM), thermo gravimetric analysis (TGA), X‐Ray diffraction (XRD) and scanning electron microscopy (SEM). The sulfamic acid was found as a magnetically
成功制备了固定在二亚乙基三胺官能化的Fe 3 O 4纳米颗粒(SA-DETA-Fe 3 O 4)上的氨基磺酸,并通过X射线衍射(XRD),傅立叶变换红外光谱(FT-IR),振动样品磁力计(VSM)对其进行了表征。 ),热重分析(TGA),X射线衍射(XRD)和扫描电子显微镜(SEM)。发现氨基磺酸是用于氧化偶联的硫醇,硫化物的氧化的可磁分离和高活性的催化剂。此外,SA-DETA-Fe 3 O 4在芳族醛与活性亚甲基化合物(丙二腈和氰基乙酸乙酯)的Knoevenagel缩合反应中具有较高的催化活性。可以通过简单的磁分离容易地回收纳米固体催化剂,并在不降低催化活性的情况下重复使用许多循环。
Simple, Efficient, and Green Method for Synthesis of Trisubstituted Electrophilic Alkenes Using Lipase as a Biocatalyst
Abstract A simple and efficient Knoevenagelcondensationmethod for the synthesis of trisubstituted electrophilic alkenes was developed using lipase as a biocatalyst. Knoevenagelcondensation was performed using the conventional method and using lipases (Aspergillus oryzae or Rhizopus oryzae) as biocatalysts, and reaction time, reaction temperature, yield, and recyclability were compared. Using a lipase
Towards organo-click reactions: development of pharmaceutical ingredients by using direct organocatalytic bio-mimetic reductions
作者:Dhevalapally B. Ramachary、G. Babul Reddy
DOI:10.1039/b612611a
日期:——
Economic and environmentally friendly bio-mimetic one-pot three and four-component Knoevenagel–hydrogenation (K–H), five-component Knoevenagel–hydrogenation–alkylation (K–H–A) and six-component Knoevenagel–hydrogenation–alkylation–Huisgen cycloaddition (K–H–A–HC) reactions of aldehydes, CH-acids, o-phenylenediamine, alkyl halides and azides using proline, proline–metal carbonate and proline–metal carbonate–CuI-catalysis, respectively have been developed. Many of K–H and K–H–A compounds have direct application in pharmaceutical chemistry.
Chemoselective Reduction of α-Cyano Carbonyl Compounds: Application to the Preparation of Heterocycles
作者:Scott R. Pollack、Jeffrey T. Kuethe
DOI:10.1021/acs.orglett.6b03285
日期:2016.12.16
in synthesis. General methods for their preparation typically afford α and β disubstitution patterns or β only. Molecules with only α-substituents (β-hydrogen) are much less well-known. A chemoselective reductive tautomerization of α-cyanoacetates, usingDIBAL-H, has been developed to access these valuable synthons. α,β-Unsaturated cyanoacetates and α-cyanoketones can, also, be selectively reduced via