N-Phenacylpyridinium Bromides as Acid Corrosion Inhibitors
摘要:
The inhibiting effect of N-phenacylpyridinium bromides with the amide group in the pyridine ring on corrosion of carbon steel in 3 M sulfuric acid is studied. A relationship between the nature of substituents at the amide group and the corrosion-protective properties of the compounds studied is revealed. Compounds demonstrating high protection efficiency in acid solutions at elevated temperatures are found.
Copper-catalyzed highly efficient oxidative amidation of aldehydes with 2-aminopyridines in an aqueous micellar system
作者:Om P. S. Patel、Devireddy Anand、Rahul K. Maurya、Prem P. Yadav
DOI:10.1039/c5gc00628g
日期:——
An environmentally benign protocol for the synthesis ofN-(pyridine-2-yl)amides from aldehydes and 2-aminopyridines has been developed under mild conditions.
M(O-N)2(NO3)2·3H2O compounds [M = nickel(II), cobalt(II)] are consistent with the presence of trans-[M(O-N)2(H2O)2]2+ ions, similar to the trans-[Zn(O-N)2(CH3OH)2]2+ species observed earlier. The EPR spectra of the trans-Cu(O-N)2X2compounds (X = NO3−, CF3SO3−) indicate an elongated octahedral coordination with equatorial bidentate (O-N) ligands and solvent molecules or anions in axial sites. The solid-state spectra
标题配体N-(2-吡啶基)-3-苯基-2-丙烯酰胺(ON)与MX 2盐的反应产生M(ON)2 X 2和[M(ON)2(H 2 O)2 ] X 2,通过元素分析,磁矩以及IR和EPR光谱进行表征。从IR光谱发现,配体通过吡啶基氮和酰胺氧是二齿的,除了在[Pd(ON)2 Cl 2 ]中仅吡啶基环被配位的之外。M(ON)2(NO 3)2 ·3H 2的磁矩,红外光谱和热分析图O化合物[M =镍(II),钴(II)]与反式-[M(ON)2(H 2 O)2 ] 2+离子的存在一致,类似于反式-[Zn(ON)较早观察到2(CH 3 OH)2 ] 2+物种。所述的EPR谱反-Cu(ON)2 X 2的化合物(X = NO 3 -,CF 3 SO 3 -)表示与赤道双齿(ON)配体以及轴向位点中的溶剂分子或阴离子具有细长的八面体配位作用。固态光谱揭示了不止一种类型的铜(II)中心的存在。通过X射线衍射确定反式-Cu(ON)2(CF
Design of enamides as new selective monoamine oxidase-B inhibitors
作者:Fathima Sahla Kavully、Jong Min Oh、Sanal Dev、Swafvan Kaipakasseri、Ashique Palakkathondi、Ajeesh Vengamthodi、Rinshana Fathima Abdul Azeez、Anna Rita Tondo、Orazio Nicolotti、Hoon Kim、Bijo Mathew
DOI:10.1111/jphp.13264
日期:2020.6.8
To develop of newclass of selective and reversible MAO‐B inhibitors from enamides.
从酰胺中开发新型的选择性和可逆的MAO-B抑制剂。
Visible-Light-Induced Metal- and Photocatalyst-Free Radical Cascade Cyclization of Cinnamamides for Synthesis of Functionalized Dihydroquinolinones
environmentally benign nature of this protocol. Preliminary mechanistic studies reveal that the blue LED irradiation efficiently cleaves the I–O bond of the hypervalent iodine reagent PhI(O2CCOAr)2 formed through ligand exchange between iodobenzene diacetate and arylglyoxylic acid to initiate the cascade reaction. The synthetic value of this operationally simple and energy-efficient method is further demonstrated
可见光促进的金属和光催化剂自由基级联环化肉桂酰胺与α-氧代羧酸,用于在温和条件下一锅可持续合成多种药学上重要的二氢喹啉酮支架。脱羧级联环化在室温下有效进行,不需要昂贵的光催化剂(例如Ir或Ru配合物),这表明该方案的实用性和环境友好性。初步机理研究表明,蓝色 LED 照射有效裂解高价碘试剂 PhI(O 2 CCOAr) 2的 I-O 键,该试剂是通过二乙酸碘苯和芳基乙醛酸之间的配体交换形成的,从而引发级联反应。这种操作简单且节能的方法的合成价值通过药物分子的后期功能化以优异的产率得到进一步证明。
Sigmatropic rearrangements of B(MIDA)-propargylic alcohols towards the diverse synthesis of α-functionalized organoborons
作者:Jiasheng Qian、Li-Cai Liu、Zhi-Hao Chen、Yuan Liu、Yin Li、Qingjiang Li、Honggen Wang
DOI:10.1007/s11426-023-1722-8
日期:2024.2
α-Functionalized organoborons are usefulbuildingblocks and key structural elements in functional molecules. Their previous synthesis relied on the famous Matteson reaction or the late-stage borylative modification of alkynes or alkenes. Recently, the synthetic transformation of borylated buildingblocks offers another useful strategy and is currently actively explored. We report herein that B(MIDA)-propargylic