Tertiary α-diarylmethylamines derived from diarylketimines and organomagnesium reagents
作者:Alaric Desmarchelier、Pablo Ortiz、Syuzanna R. Harutyunyan
DOI:10.1039/c4cc06719c
日期:——
Organomagnesium reagents enable swift and versatile derivatisation of diarylimines to the corresponding α-substituted diarylmethylamines in excellent yields, through fast and clean reactions.
有机镁试剂使二芳基亚胺能够迅速、多样地衍生为相应的α-取代二芳基甲胺,收率极高,反应快速干净。
Mn<sub>3</sub> Single-Molecule Magnets and Mn<sub>6</sub>/Mn<sub>9</sub> Clusters from the Use of Methyl 2-Pyridyl Ketone Oxime in Manganese Phosphinate and Phosphonate Chemistry
作者:Olajuyigbe A. Adebayo、Khalil A. Abboud、George Christou
DOI:10.1021/acs.inorgchem.7b01793
日期:2017.9.18
aerial oxidation of Mn(ClO4)2 in the presence of mpkoH. 1 and 2 contain a triangular Mn3 core, 3 comprises the fusion of two Mn3 units of 1 by MeO– bridges, and 4 has a cagelike structure. 5 is similar to 1 in possessing a triangularcore. Variable-temperature, solid-state direct-current (dc) and alternating-current (ac) magnetic data were collected on 1–5: 1 and 2 exhibit ferromagnetic Mn····Mn exchange
报告了五个新的Mn团簇的合成,结构和磁化学性质:[Mn III 3 O(O 2 PPh 2)3(mpko)3 ](ClO 4)(1),[Mn III 3 O(O 2 PPh)2)3(ppko)3 ](ClO 4)(2)[Mn III 6 O 2(OMe)4(O 2 PPh 2)4(mpko)4 ](ClO 4)2(3),[Mn III 8 Mn II O 6(O 2 CMe)7(O 3 PPh)2(mpko)3(H 2 O)](4)和[Mn III 2 Mn II O(mpko)3(H 2 O)4(CLO 4)2 ](CLO 4)(5),其中,MPKO - (或ppko - )是甲基(或苯基)的阴离子2-吡啶基酮肟。1个通过用二苯基次膦酸(Ph 2 PO 2 H)处理在[Mn III 3 O(O 2 CMe)3(mpko)3 ](ClO 4)上进行羧酸酯取代获得。在EtOH中存在Ph 2 PO
Synthesis of Novel GABA Uptake Inhibitors. 3. Diaryloxime and Diarylvinyl Ether Derivatives of Nipecotic Acid and Guvacine as Anticonvulsant Agents
作者:Lars J. S. Knutsen、Knud Erik Andersen、Jesper Lau、Behrend F. Lundt、Rodger F. Henry、Howard E. Morton、Lars Nærum、Hans Petersen、Henrik Stephensen、Peter D. Suzdak、Michael D. B. Swedberg、Christian Thomsen、Per O. Sørensen
DOI:10.1021/jm981027k
日期:1999.9.1
(3R)-1-[4,4-bis(3-methyl-2-thienyl)-3-buteny] acid 1(tiagabine, Gabitril) is a potent and selective gamma-aminobutyric acid (GABA) uptake inhibitor with proven anticonvulsant efficacy in humans. This drug, which has a unique mechanism of action among marketed anticonvulsant agents, has been launched for add-on treatment of partial seizures with or without secondary generalization in patients > 12 years of age. Using this new agent as a benchmark, we have designed two series of novel GABA uptake inhibitors of remarkable potency, using a putative new model of ligand interaction at the GABA transporter type 1 (GAT-1) uptake site. This model involves the postulated interaction of an electronegative region in the CABA uptake inhibitor with a positively charged domain in the protein structure of the GAT-1 site. These two novel series of anticonvulsant agents contain diaryloxime or diarylvinyl ether functionalities linked to cyclic amino acid moieties and were derived utilizing the new model, via a series of design steps from the known 4,4-diarylbutenyl GABA uptake inhibitors. The new compounds are potent inhibitors of [H-3]-GABA uptake in rat brain synaptosomes in vitro, and their antiepileptic potential was demonstrated in vivo by their ability to protect against seizures induced by the benzodiazepine receptor inverse agonist methyl 4-ethyl-6,7-dimethoxy-beta-carboline-3-carboxylate (DMCM) in mice. From structure-activity studies of these new GABA uptake inhibitors, we have shown that insertion of an ether oxygen in conjugation with the double bond in tiagabine (K-i = 67 nM) improves in vitro potency by 5-fold to 14 nM.
“Switching on” the single-molecule magnet properties within a series of dinuclear cobalt(<scp>iii</scp>)–dysprosium(<scp>iii</scp>) 2-pyridyloximate complexes
作者:C. D. Polyzou、E. S. Koumousi、Z. G. Lada、C. P. Raptopoulou、V. Psycharis、M. Rouzières、A. C. Tsipis、C. Mathonière、R. Clérac、S. P. Perlepes
DOI:10.1039/c7dt02717f
日期:——
octahedrally coordinated by the six nitrogen atoms of the deprotonated organic ligands in a facial arrangement. The DyIII centre is bound to an O9 set of donor atoms, its coordination sphere being completed by three bidentate chelating nitrato groups. The coordination polyhedron around DyIII in 1 is best described as Johnson tricapped trigonal prism, while the coordination geometries of the DyIII centres
Synthesis, structural characterization and reactivity of triosmium carbonyl clusters containing oxime ligands
作者:Janet Shuk-Yee Wong、Wing-Tak Wong
DOI:10.1039/b107628k
日期:2002.1.24
respectively. In cluster 4, one of the oximato moieties is deoxygenated with N–O bondcleavage. Treatment of another oxime ligand, benzophenone oxime, with [Os3(CO)10(NCMe)2] gave [Os3(μ-H)(CO)10μ-η2-ONCPh2}] 5 in moderate yield. On thermolysis of 5 in toluene, [Os3(μ-H)2(CO)9μ-η3-ONCPh(C6H4)}] 6 and [Os3(CO)10(μ-OH)μ-NCPh2}] 7 were isolated in 27 and 21% yields, respectively. The oxime ligand in 6 is