Magnetic bio-nanocomposite catalysts of CoFe2O4/hydroxyapatite-lipase for enantioselective synthesis provide a framework for enzyme recovery and reuse

2020 ◽  
Vol 148 ◽  
pp. 284-291 ◽  
Author(s):  
Samuel Saire-Saire ◽  
Sergi Garcia-Segura ◽  
Clemente Luyo ◽  
Leandro H. Andrade ◽  
Hugo Alarcon
Nanoscale ◽  
2020 ◽  
Vol 12 (15) ◽  
pp. 8065-8094 ◽  
Author(s):  
Xudong Wen ◽  
Jingqi Guan

Different kinds of electrocatalysts used in NRR electrocatalysis (including single atom catalysts, metal oxide catalysts, nanocomposite catalysts, and metal free catalysts) are introduced.


Author(s):  
Xin-Ming Xu ◽  
Ming Xie ◽  
Jiazhu Li ◽  
Mei-Xiang Wang

An exquisite Pybox/Cu(OTf)2-catalyzed asymmetric tandem reaction of tertiary enamides was developed, which enabled the expeditious synthesis of indolizino[8,7-b]indole derivatives in high yield, excellent enantioselectivity and diastereoselectivity.


2018 ◽  
Author(s):  
Matthew L. Landry ◽  
Grace McKenna ◽  
Noah Burns

A concise and selective synthesis of the dichlorinated meroterpenoid azamerone is described. The paucity of tactics for the synthesis of chiral organochlorides motivated the development of unique strategies for accessing these motifs in enantioenriched forms. The route features a novel enantioselective chloroetherification reaction, a Pd-catalyzed cross-coupling between a quinone diazide and a boronic hemiester, and a late-stage tetrazine [4+2]-cycloaddition/oxidation cascade.


2019 ◽  
Author(s):  
Ming Shang ◽  
Karla S. Feu ◽  
Julien C. Vantourout ◽  
Lisa M. Barton ◽  
Heather L. Osswald ◽  
...  

<div> <div> <div> <p>The union of two powerful transformations, directed C–H activation and decarboxylative cross-coupling, for the enantioselective synthesis of vicinally functionalized alkyl, carbocyclic, and heterocyclic compounds is described. Starting from simple carboxylic acid building blocks, this modular sequence exploits the residual directing group to access more than 50 scaffolds that would be otherwise extremely difficult to prepare. The tactical use of these two transformations accomplishes a formal vicinal difunctionalization of carbon centers in a way that is modular and thus amenable to rapid diversity incorporation. A simplification of routes to known preclinical drug candidates is presented along with the rapid diversification of an antimalarial compound series. </p> </div> </div> </div>


2018 ◽  
Author(s):  
Matthew L. Landry ◽  
Grace McKenna ◽  
Noah Burns

A concise and selective synthesis of the dichlorinated meroterpenoid azamerone is described. The paucity of tactics for the synthesis of chiral organochlorides motivated the development of unique strategies for accessing these motifs in enantioenriched forms. The route features a novel enantioselective chloroetherification reaction, a Pd-catalyzed cross-coupling between a quinone diazide and a boronic hemiester, and a late-stage tetrazine [4+2]-cycloaddition/oxidation cascade.


ARCHALP ◽  
2020 ◽  
Vol 2020 (N. 4 / 2020) ◽  
Author(s):  
Antonio De Rossi ◽  
Laura Mascino

It hasn’t even been half a century since, in 1977, the famous book by Nuto Revelli entitled Il mondo dei vinti was published. A symbolic image, which summed up with powerful evocative efficacy the dramatic process of depopulation and dissolution of traditional Alpine societies during the twentieth century. A phenomenon that found its epicenter in the valleys of Carnia and in the south-east of France, and especially in the Piedmont’s valleys of the Cuneo area, with drop-out rates that will reach even 80-90% of the population. A little over forty years have passed by since Nuto Revelli’s book was published and since then a lot seemed to have changed. Today many prestigious and successful tourist and winter centers are experiencing a growing crisis of image and public, while the once neglected Valades ousitanes live an unprecedented season, focused on enhancing the trinomial of natural, historical, and cultural heritage. Maira Valley, Ostana in the Po Valley, Paraloup and Rittana in the Stura Valley, the upper Varaita Valley, the phenomena of rebirth are affecting all the Occitan valleys, with interesting resettlement processes that have their engine in who are defined «the new mountaineers». This renaissance of the Occitan valleys is accompanied by new forms of architecture that focus on the theme of the recovery and reuse of heritage, of dialectical confrontation with environmental and historical contexts, but without forgetting the contemporary and technological innovation.


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