在这项研究中,已经报道了一些新的5-乙酰基-3,4-二氢-6-甲基-4-(取代的苯基)-2(1H)-嘧啶酮的合成。该化合物是通过乙酰丙酮与芳族醛和尿素的Biginelli反应制备的。通过UV,IR,1 H NMR,13 C NRM,质谱和元素分析表征化合物的结构。这些化合物的钙拮抗活性在体外用4 x 10(-3)M氯化钡预收缩的大鼠回肠上进行了测试。
A One-Pot Synthesis of 3,4-Dihydropyrimidin-2-(1H)-ones from Primary Alcohols Promoted by Bi(NO3)3·5H2O in Two Different Media: Organic Solvent and Ionic Liquid
作者:Ahmad Reza Khosropour、Ahmad R. Khosropour、Mohammd M. Khodaei、Mojtaba Beygzadeh、Mahbubeh Jokar
DOI:10.3987/com-04-10257
日期:——
A new, simple and efficientprocedure for the one-pot conversion of alcohols instead of aldehydes to the corresponding 3,4-dihydropyrimidin-2(1H)-ones (DHPMs) with Bi(NO 3 ) 3 .5H 2 O as a commercially available, inexpensive, stable and non-toxic reagent in two media, acetonitrile (as an organic solvent) and tetrabutylammonium bromide (as an ionic liquid) is described. This one-pot oxidation-cyclocondensation
Regioselective chlorination at C-6 methyl position of 3,4-dihydropyrimidin-2(1H)-ones using (dichloroiodo)benzene
作者:Nilesh P. Tale、Amol V. Shelke、Bhagyashree Y. Bhong、Nandkishor N. Karade
DOI:10.1007/s00706-012-0908-0
日期:2013.7
(dichloroiodo)benzene with 4-aryl-1,2,3,4-tetrahydro-6-methyl-2-oxopyrimidine-5-carboxylates and 5-acetyl-4-aryl-3,4-dihydro-6-methylpyrimidin-2(1H)-ones resulted in geminal dichlorination at the C-6 methyl position of 3,4-dihydropyrimidin-2(1H)-one. Graphical abstract
Study of the Synthesis of Some Biginelli-type Products Catalyzed by Nano-ZrO<sub>2</sub>
作者:Asadollah Farhadi、Mohammad Ali Takassi、Leila Hejazi
DOI:10.5560/znb.2013-2192
日期:2013.1.1
Abstract
Nanoparticles of zirconium(IV) oxide catalyze the three-component coupling of aromatic aldehydes, b-diketones and urea to afford the correspo nding 3,4-dihydropyrimidinones (Biginelli compounds) in moderate to good yields under mild conditions.
Pyridinium-Based Brønsted Acidic Ionic Liquid as a Highly Efficient Catalyst for One-Pot Synthesis of Dihydropyrimidinones
作者:Abdol R. Hajipour、Mohadeseh Seddighi
DOI:10.1080/00397911.2010.523488
日期:2012.1.15
Abstract In this work, the synthesis and characterization of 3-carboxypyridinium hydrogensulfate ([Hcpy]HSO4) as a new Brønsted acidic ionicliquid are reported. This reusable, inexpensive, and green catalyst was employed for one-pot condensation of 1,3-dicarbonyl compounds, aromatic aldehydes and urea or thiourea for the synthesis of the corresponding 3,4-Dihydropyrimidin-2(1H)-ones. The reactions were
Sulfamicacid supported on magnetic Fe3O4 nanoparticles catalyzed the condensation reaction of aldehydes, 1,3-dicarbonyl compounds, and urea or thiourea in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones under solvent-free conditions. This method offers several advantages including high yield, short reaction time, ease of separation, and recyclability of the magnetic catalyst.
磁性Fe 3 O 4纳米粒子上负载的氨基磺酸催化在溶剂-溶剂下合成3,4-二氢嘧啶-2(1 H)-酮/硫酮时醛,1,3-二羰基化合物与脲或硫脲的缩合反应。免费条件。该方法具有几个优点,包括高产率,短反应时间,易于分离和磁性催化剂的可回收性。