Synthesis, characterization, and biological evaluation of certain 1,3-thiazolone derivatives bearing pyrazoline moiety as potential anti-breast cancer agents
摘要:
A series of 5-arylidene-2-(3,5-diaryl-4,5-dihydro-1H-pyrazol-1-yl)-1,3-thiazol-4(5H)-ones were synthesized and screened for their in vitro antitumor activity against human breast adenocarcinoma cell line (MCF-7). Five of the test compounds exhibited good antitumor activity superior to the reference drug, doxorubicin, with IC50 range 1.4-2.3 mu M. Among the test compounds, 2-[3,5-bis(4-chlorophenyl)-4,5-dihydro-1H-pyrazol-1-yl]-5-(2-methoxybenzylidene)-1,3-thiazol-4(5H)-one (3i) was found to show the most potent anticancer activity.
Homogeneous RuCl2(PPh3)3-Catalyzed Regioselective Liquid-Phase Transfer Hydrogenation of Carbon−Carbon Double Bond in Chlorobenzylidene Ketones with Ethylene Glycol as Hydrogen Donor
摘要:
The regioselective transfer hydrogenation of a carbon-carbon double bond of different chlorobenzylidene ketones is effectuated in ethylene glycol with a very high selectivity in the presence of homogeneous, tris(triphenylphosphine)ruthenium-(II) chloride catalyst. Different important process parameters such as temperature, catalyst loading, and reaction period are studied. The reaction follows a first order kinetics, and the energy of activation was found to be 52 kJ/mol.
Designed pincer ligand supported Co(<scp>ii</scp>)-based catalysts for dehydrogenative activation of alcohols: Studies on <i>N</i>-alkylation of amines, α-alkylation of ketones and synthesis of quinolines
作者:Anshu Singh、Ankur Maji、Mayank Joshi、Angshuman R. Choudhury、Kaushik Ghosh
DOI:10.1039/d0dt03748f
日期:——
Base-metal catalysts Co1, Co2 and Co3 were synthesized from designed pincerligands L1, L2 and L3 having NNN donor atoms respectively. Co1, Co2 and Co3 were characterized by IR, UV–Vis. and ESI-MS spectroscopic studies. Single crystal X-ray diffraction studies were investigated to authenticate the molecular structures of Co1 and Co3. Catalysts Co1, Co2 and Co3 were utilized to study the dehydrogenative
Efficient Organoruthenium Catalysts for α‐Alkylation of Ketones and Amide with Alcohols: Synthesis of Quinolines
<i>via</i>
Hydrogen Borrowing Strategy and their Mechanistic Studies
for C−C bond formation and exhibited excellent performance in the dehydrogenative coupling of ketones and amides. In the synthesis of C–C bonds, alcohols were utilized as the alkylating agent. A broad range of substrates, including sterically hindered ketones and alcohols, were well tolerated under the optimized conditions (TON up to 47000 and TOF up to 11750 h−1). This ruthenium (II) catalysts were
BINAP-copper supported by hydrotalcite as an efficient catalyst for the borrowing hydrogen reaction and dehydrogenation cyclization under water or solvent-free conditions
作者:Zhaojun Xu、Xiaoli Yu、Xinxin Sang、Dawei Wang
DOI:10.1039/c8gc00557e
日期:——
A BINAP-Cu system supported by hydrotalcite has been developed and proved to be a highlyefficientcatalyst for the atom-efficient and green borrowing hydrogen reaction and dehydrogenative cyclization. This BINAP-Cu complex supported by hydrotalcite is highly air-stable and can be recycled at least five times under solvent-free conditions. Notably, 1-benzyl-2-aryl-1H-benzo[d]imidazole derivatives could
已经开发了由水滑石支撑的BINAP-Cu系统,并被证明是一种高效的催化剂,用于原子效率高的绿色借入氢反应和脱氢环化反应。这种由水滑石负载的BINAP-Cu络合物具有高度的空气稳定性,在无溶剂条件下可以循环至少五次。值得注意的是,第一次以水为溶剂仅一步即可由醇合成1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物。这为在水或无溶剂条件下以高收率合成官能化的胺,酮和1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物提供了一种更加绿色有效的催化方法。
SmI
<sub>2</sub>
‐mediated C‐alkylation of Ketones with Alcohols under Microwave Conditions: A Novel Route to Alkylated Ketones
A microwave-assisted SmI2-catalysed protocol has been developed for the direct C-alkylation of ketones with alcohols. The developed methodology showed diverse substrate scope with good functional group tolerance. The methodology is also useful for the synthesis of substituted quinolines via Friedländer reaction. The synthetic applicability of the reaction is well explored by preparation of Donepezil
Fe
<sub>3</sub>
O
<sub>4</sub>
@CS‐Ni: An efficient and recyclable magnetic nanocatalyst for
<i>α</i>
‐alkylation of ketones with benzyl alcohols by borrowing hydrogen methodology
作者:Mina Taheri‐Torbati、Hossein Eshghi
DOI:10.1002/aoc.6838
日期:2022.10
heterogeneous magnetic impressive nickel catalyst in which Fe3O4 nanoparticles have been coated with chitosan and decorated with nickelnanoparticles (Fe3O4@CS-Ni). This catalyst has been used for direct α-alkylation of aryl ketones with substituted benzyl alcohols through borrowing hydrogen and dehydrogenation mechanism that affords the corresponding α-benzyl ketones, with good to excellent yield. The
本文报道了一种非均相磁性镍催化剂,其中 Fe 3 O 4纳米粒子已涂有壳聚糖并用镍纳米粒子(Fe 3 O 4 @CS-Ni)进行装饰。该催化剂通过借氢和脱氢机理用于芳基酮与取代苯甲醇的直接α-烷基化反应,得到相应的α-苄基酮,具有良好至极好的收率。核壳形态已通过不同的分析技术进行确认,例如傅里叶变换红外 (FT-IR)、X 射线衍射 (XRD)、振动样品磁力计 (VSM)、扫描电子显微镜 (SEM)、透射电子显微镜 ( TEM)、SEM 映射、能量色散 X 射线 (EDX)、电感耦合等离子体 (ICP) 和热重分析 (TGA)。此外,催化剂可以通过使用外部磁场从反应混合物中回收并重复使用六个连续循环,而催化活性不会显着降低。