N-(1-甲苯磺酰基乙基)硫脲与烯醇钾反应合成了一种新型环状硫脲,5-乙酰基-4,6-二甲基-1,2,3,4-四氢嘧啶-2-硫酮(L)。乙酰丙酮,然后对所得 5-乙酰基-4-羟基-4,6-二甲基六氢嘧啶-2-硫酮进行酸催化脱水。通过 X 射线衍射研究了它的多晶型物和与锌、镉和碘化汞的配合物。5-乙酰基-4,6-二甲基-1,2,3,4-四氢嘧啶-2-硫酮的两种多晶型在环构象和堆积方式上有所不同。在单体镉配合物 [CdL2I2] 中,中心原子以标准方式由碘和硫代羰基 S 原子四面体配位,而在二聚汞配合物 [Hg2L2I4] 中,每个汞原子由两个桥连 I 原子配位,一个末端 I原子和配体的一个硫代羰基 S 原子。
A facile approach for the synthesis of 3,4‐dihydropyrimidin‐2(1H)‐ones was developed by a tandem multi‐component reaction (MCR) in onepot. This approach involves two steps, lipase‐catalyzed in situ generation of acetaldehyde and the Biginelli reaction in turn. Several control experiments were performed using acetaldehydes directly to explore the possible mechanism of this procedure. Moreover, owing
The Biginelli Reaction with an Imidazolium-Tagged Recyclable Iron Catalyst: Kinetics, Mechanism, and Antitumoral Activity
作者:Luciana M. Ramos、Bruna C. Guido、Catharine C. Nobrega、José R. Corrêa、Rafael G. Silva、Heibbe C. B. de Oliveira、Alexandre F. Gomes、Fábio C. Gozzo、Brenno A. D. Neto
DOI:10.1002/chem.201204314
日期:2013.3.25
The present work describes the synthesis, characterization, and application of a new ion‐tagged iron catalyst. The catalyst was employed in the Biginelli reaction with impressive performance. High yields have been achieved when the reaction was carried out in imidazolium‐based ionicliquids (BMI⋅PF6, BMI⋅NTf2, and BMI⋅BF4), thus showing that the ionic‐liquid effects play a role in the reaction. Moreover
Synthesis of 5-acetyl-4,6-dimethyl-1,2,3,4-tetrahydropyrimidine-2-thione and structural characterization of its polymorphs and complexes with 12-group metal iodides
作者:Anatoly D. Shutalev、Elena V. Savinkina、Dmitry V. Albov、Ilia A. Zamilatskov、Evgueny A. Buravlev
DOI:10.1007/s11224-011-9770-7
日期:2011.8
obtained 5-acetyl-4-hydroxy-4,6-dimethylhexahydropyrimidine-2-thione. Itspolymorphs and complexes with zinc, cadmium, and mercury iodides were studied by X-ray diffraction. Two polymorphs of 5-acetyl-4,6-dimethyl-1,2,3,4-tetrahydropyrimidine-2-thione differ in ring conformation and packing manner. In the monomeric cadmium complex [CdL2I2], the central atom is tetrahedrally coordinated in the standard
N-(1-甲苯磺酰基乙基)硫脲与烯醇钾反应合成了一种新型环状硫脲,5-乙酰基-4,6-二甲基-1,2,3,4-四氢嘧啶-2-硫酮(L)。乙酰丙酮,然后对所得 5-乙酰基-4-羟基-4,6-二甲基六氢嘧啶-2-硫酮进行酸催化脱水。通过 X 射线衍射研究了它的多晶型物和与锌、镉和碘化汞的配合物。5-乙酰基-4,6-二甲基-1,2,3,4-四氢嘧啶-2-硫酮的两种多晶型在环构象和堆积方式上有所不同。在单体镉配合物 [CdL2I2] 中,中心原子以标准方式由碘和硫代羰基 S 原子四面体配位,而在二聚汞配合物 [Hg2L2I4] 中,每个汞原子由两个桥连 I 原子配位,一个末端 I原子和配体的一个硫代羰基 S 原子。
Discovery of novel pleuromutilin derivatives as potent antibacterial agents
Novel pleuromutilin derivatives with 3,4-dihydropyrimidin and pyrimidine moieties were designed, synthesized, and evaluated for their antibacterial activities. Most of the synthesized derivatives, especially the compounds bearing the pyrimidine moieties, exhibited potent antibacterial activities against methicillin-resistant Staphylococcus aureus BNCC 337371 (MRSA-337371), Staphylococcus aureus ATCC
was detected in high concentrations in the brain and red blood cells. BChE is another enzymes that is abundant available in the liver and released into the blood in a soluble form. Newly synthesized hetaryl sulfonamides exhibited impressive inhibition profiles with Ki values in the range of 1.42-6.58 nM against hCA I, 1.72-7.41 nM against hCA II, 0.20-1.14 nM against AChE and 1.55-5.92 nM against BChE