scholarly journals Funktionalisierte tripod-Liganden mit Neopentan-Grundgerüst: Umsetzung von HOCH2C(CH2PR2)3 mit Elektrophilen / Functionalized tripod-Ligands with N eopentane Fram ew ork: R eaction of HOCH2C(CH2PR2)3 with Electrophiles

1995 ◽  
Vol 50 (9) ◽  
pp. 1287-1306 ◽  
Author(s):  
Thomas Seitz ◽  
Alexander Asam ◽  
Gottfried Hüttner ◽  
Olaf Walter ◽  
Laszlo Zsolnai
Keyword(s):  
Hydroxy Group ◽  
Analytical Techniques ◽  
One Pot ◽  
X Ray ◽  
One Pot Synthesis ◽  
Tripod Ligands ◽  
Esterification Reactions ◽  
New Compounds

AbstractSeveral ways to functionalize hydroxy-tripod-ligands (HOCH2C(CH2PR2)3) by activation with electrophiles are presented. The use of carboxylic halides and anhydrides is shown to be generally successful for esterification reactions in a one-pot synthesis starting from the oxetanes O(CH2)2C(CH2PR2)2. Facial coordinaton of the related esters towards iron(II) and molybdenum(O) can be achieved depending on the nature of the phosphane donor groups. If methyliodide or trimethylsilylchloride are used as electrophiles in order to functionalize the hydroxy group in HOCH2C(CH2PR2)3, it is necessary to proctect the phosphane groups by formation of the tris-borane adduct. All new compounds have been fully characterized by the usual analytical techniques as well as by X-ray analyses on selected examples.

Catalyst-Free One-Pot Synthesis of Chromeno-Imidazo-Pyridinones by an Aza-Michael Addition/Rearrangement/Heterocyclization Tandem Reaction

Synlett ◽  
2018 ◽  
Vol 29 (11) ◽  
pp. 1437-1440 ◽  
Author(s):  
Oualid Talhi ◽  
Norah Bennamane ◽  
Artur Silva ◽  
Houria Lakhdari ◽  
Ridha Hassaine ◽  
...  
Keyword(s):  
Michael Addition ◽  
Room Temperature ◽  
Addition Reaction ◽  
2D Nmr ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
New Compounds

A one-pot synthesis of a novel series of chromeno-imidazo-pyridinone derivatives from 3-[(2-hydroxyphenyl)-3-oxoprop-1-en-1-yl]chromones and ethane-1,2-diamine at room temperature under catalyst-free conditions has been successfully developed. This approach involves a tandem aza-Michael addition reaction, a chromone-to-chromanone rearrangement, and a heterocyclization sequence, leading to chromeno-imidazo-pyridinone polyheterocycles. The structure and absolute configurations of the new compounds were elucidated by a combination of 1D- and 2D-NMR analyses and single-crystal X-ray diffraction.

tripod-Eisen- und tripod-Cobalt-Komplexe mit Acetonitril als Stützliganden (tripod = RCH2C(CH2PPh2)3; R = H, Ph) / tripod-Iron and tripod-Cobalt-Complexes with Acetonitrile as Supporting Ligands (tripod = RCH2C(CH2PPh2)3; R = H, Ph)

1993 ◽  
Vol 48 (12) ◽  
pp. 1707-1714 ◽  
Author(s):  
A. Asam ◽  
B. Janssen ◽  
G. Huttner ◽  
L. Zsolnai ◽  
O. Walter
Keyword(s):  
Cyclic Voltammetry ◽  
Analytical Techniques ◽  
Cobalt Complexes ◽  
X Ray ◽  
Tripod Ligands ◽  
Reversible Reduction

The tripod ligands RCH2C(CH2PPh2)3 react with (CH3CN)6Fe(BF4)2 to yield the tripod-Fe(II) complexes RCH2C(CH2PPh2)3Fe(CH3CN)3(BF4)2 (R = H, la; R = Ph, lb). The octahedral low spin Fe(II) compounds are shown by cyclic voltammetry to undergo reversible one electron oxidation at +1.47 V (vs. SCE) to give the corresponding Fe(III) derivatives.In a similar way (CH3CN)6Co(BF4)2 reacts with the same tripod ligands to produce the tripod-Co(II) complexes RCH2C(CH2PPh2)3Co(CH3CN)2(BF4)2 (R = H, 2a; R = Ph, 2b). The compounds are paramagnetic (2a, g = 2.123; 2b, g = 2.129). The structure of complex 2b shows that the tripod ligand is facially coordinated with one longer (233.1 pm) and two shorter (about 222 pm) Co—P bonds. Reversible reduction is found for 2a at —0.30 V by cyclic voltammetry. The compounds have been characterized by spectroscopic and analytical techniques including X-ray analyses.

One-Pot Synthesis of a Novel 3D CuO Microstructure with Excellent Electrochemical Hydrogen Capacity

2014 ◽  
Vol 998-999 ◽  
pp. 71-74
Author(s):  
Ying Li ◽  
Yong Kui Yin ◽  
Sheng Zhong Rong ◽  
Xin Yu Cui ◽  
Ge Jin ◽  
...  
Keyword(s):  
Field Emission ◽  
Vital Role ◽  
Scanning Microscopy ◽  
One Pot ◽  
Initial Concentration ◽  
X Ray ◽  
Hydrogen Capacity ◽  
One Pot Synthesis

A novel flocculus-like CuO microstructure exhibiting excellent electrochemical hydrogen capacity of 210 mAh/g were fabricated using Cu (OH)2 as precursor. By altering the initial concentration of NaOH, novel butter-like and flower-like CuO microstructures without electrochemical hydrogen capacity were also obtained. Field emission scanning microscopy (FESEM) and X-ray power diffraction (XRD) were characterized the as-obtained products. The dosage of NaOH plays a vital role in controlling the morphology, which affects electrochemical hydrogen capacity of final products.

Facile One-Pot Synthesis and X-ray Characterization of N-(Thio)phosphoryl-2-oxo-1,2-azaphospholanes: First Example of Cyclic O,O- and O,S-Bidentate Ligands with the P-N-P Backbone

Synthesis ◽  
2009 ◽  
Vol 2010 (04) ◽  
pp. 613-618
Author(s):  
Irina Odinets ◽  
Inga Aladzheva ◽  
Olga Bykhovskaya ◽  
Yulya Nelyubina ◽  
Alexander Korlyukov ◽  
...  
Keyword(s):  
Bidentate Ligands ◽  
One Pot ◽  
X Ray ◽  
One Pot Synthesis

Nano-cuprous oxide catalyzed one-pot synthesis of a carbazole-based STAT3 inhibitor: a facile approach via intramolecular C–N bond formation reactions

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36775-36785 ◽  
Author(s):  
C. P. Baburajeev ◽  
Chakrabhavi Dhananjaya Mohan ◽  
Govindagouda S. Patil ◽  
Shobith Rangappa ◽  
Vijay Pandey ◽  
...  
Keyword(s):  
Cuprous Oxide ◽  
Inhibitory Activity ◽  
Bond Formation ◽  
One Pot ◽  
Carbazole Derivatives ◽  
One Pot Synthesis ◽  
The One ◽  
New Compounds ◽  
Bond Formation Reactions

In this study, we report the one-pot synthesis of substituted carbazole derivatives using nano cuprous oxide as a catalyst and demonstrated the STAT3 inhibitory activity of new compounds.

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