Macrocyclic multinuclear metal complexes acting as catalysts for organic synthesis

2020 ◽  
Vol 10 (1) ◽  
pp. 12-34 ◽  
Author(s):  
Bikash Dev Nath ◽  
Kazuto Takaishi ◽  
Tadashi Ema
Keyword(s):  
Metal Complexes ◽  
Organic Synthesis ◽  
Homogeneous Catalysis ◽  
Recent Progress

Recent progress in homogeneous catalysis with macrocyclic multinuclear metal complexes (categories A–C) is overviewed.

O-AcylTEMPOs, a Modified and Fundamental, but Unexplored Carboxylic Derivative: Recent Progress in Synthetic Applications

2019 ◽  
Vol 23 (19) ◽  
pp. 2102-2121
Author(s):  
Hiroyuki Kawafuchi ◽  
Lijian Ma ◽  
Md Imran Hossain ◽  
Tsutomu Inokuchi
Keyword(s):  
Organic Synthesis ◽  
Recent Progress ◽  
Knoevenagel Condensation ◽  
Acid Synthesis ◽  
Amino Acid Synthesis ◽  
Electrophilic Amination ◽  
Weinreb Amides ◽  
Anionic Species ◽  
Diastereoselective Addition ◽  
Carbonyl Function

O-Acylated 2,2,6,6-tetramethylpiperidine-N-oxyls (abbr. O-AcylTEMPOs) are easily available and stable carboxylic derivatives, but their utility in organic synthesis is unexplored in contrast to analogues, such as the N-methoxy-N-methylamides, known as Weinreb amides. Especially, the O–N unit of the O-acylTEMPOs dictates a fairly electronwithdrawing character for the carbonyl function. This enhances the reactivity and stability of the resulting enolate ions. Accordingly, O-acylTEMPOs allow various transformations and this review encompasses seven topics: (1) Reactivity of O-acylTEMPOs towards nucleophiles and chemoselective transformations, (2) Reactivity of anionic species derived from O-acylTEMPOs, (3) E-Selective Knoevenagel condensation of acetoacetylTEMPOs and synthesis of furans, (4) Electrocyclization of 2,4-dienones derived from acetoacetic derivatives and 2-substituted enals, (5) Diastereoselective addition of amide anion to O-(2-alkenoyl)TEMPOs and β-amino acid synthesis, (6) Thermolysis of O-acylTEMPOs, and (7) Applications for Umpolung reactions using O-benzoylTEMPOs, useful for the electrophilic amination of alkenes and alkynes.

Phosphorus Containing Porous Organic Polymers: Synthetic Techniques and Applications in Organic Synthesis and Catalysis

2021 ◽  
Author(s):  
Pramod Kumar ◽  
Animesh Das ◽  
Biplab Maji
Keyword(s):  
Organic Synthesis ◽  
Homogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Organic Polymer ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Porous Organic Polymer ◽  
Phosphorus Containing

The phosphorous-containing porous organic polymer is a trending material for the synthesis of heterogeneous catalysts. Decades of investigations have established phosphines as versatile ligands in homogeneous catalysis. Recently, phosphine-based heterogeneous...

Recent progress in the mechanochromism of phosphorescent organic molecules and metal complexes

2016 ◽  
Vol 4 (28) ◽  
pp. 6688-6706 ◽  
Author(s):  
Pengchong Xue ◽  
Jipeng Ding ◽  
Panpan Wang ◽  
Ran Lu
Keyword(s):  
Metal Complexes ◽  
Recent Progress ◽  
Organic Molecules ◽  
Mechanical Force ◽  
Spectral Shifts ◽  
Luminescence Color

Phosphorescent mechanochromic materials may change their luminescence color and intensity with large spectral shifts under a mechanical force stimulus.

Homogeneous catalysis as a tool for organic synthesis

1998 ◽  
Vol 70 (5) ◽  
pp. 1041-1046 ◽  
Author(s):  
W. A. Nugent ◽  
G. Licini ◽  
Marcella Bonchio ◽  
Olga Bortolini ◽  
M. G. Finn ◽  
...  
Keyword(s):  
Organic Synthesis ◽  
Homogeneous Catalysis
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