Synthesis of Phosphine Chalcogenides Under Solvent-Free Conditions Using a Rotary Ball Mill

2018 ◽  
Vol 2018 (8) ◽  
pp. 1028-1037 ◽  
Author(s):  
Rajnish Kumar ◽  
Saurabh Kumar ◽  
Madhusudan K. Pandey ◽  
Vitthalrao S. Kashid ◽  
Latchupatula Radhakrishna ◽  
...  
Keyword(s):  
Ball Mill ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Phosphine Chalcogenides

Fast, solvent-free and highly enantioselective fluorination of β-keto esters catalyzed by chiral copper complexes in a ball mill

2017 ◽  
Vol 19 (7) ◽  
pp. 1674-1677 ◽  
Author(s):  
Yifeng Wang ◽  
Haojiang Wang ◽  
Yidong Jiang ◽  
Cheng Zhang ◽  
Juanjuan Shao ◽  
...  
Keyword(s):  
Ball Mill ◽  
Copper Complexes ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Keto Esters ◽  
Solvent Free Conditions

A fast and highly enantioselective fluorination of β-keto esters catalyzed by diphenylamine linked bis(oxazoline)-Cu(OTf)2 complexes under solvent-free conditions has been developed using a planetary ball mill.

Non-catalyzed addition of secondary phosphine chalcogenides to divinyl chalcogenides under solvent-free conditions

2016 ◽  
Vol 37 (5) ◽  
pp. 488-500
Author(s):  
Nina K. Gusarova ◽  
Nataliya A. Chernysheva ◽  
Svetlana V. Yas’ko ◽  
Lyudmila V. Klyba ◽  
Boris A. Trofimov
Keyword(s):  
Solvent Free ◽  
Secondary Phosphine ◽  
Secondary Phosphine Chalcogenides ◽  
Solvent Free Conditions ◽  
Phosphine Chalcogenides

scholarly journals Efficient mechanochemical synthesis of regioselective persubstituted cyclodextrins

2016 ◽  
Vol 12 ◽  
pp. 2364-2371 ◽  
Author(s):  
Laszlo Jicsinszky ◽  
Marina Caporaso ◽  
Katia Martina ◽  
Emanuela Calcio Gaudino ◽  
Giancarlo Cravotto
Keyword(s):  
Mechanochemical Synthesis ◽  
Ball Mill ◽  
Solvent Free ◽  
Planetary Ball Mill ◽  
Aprotic Solvents ◽  
Isolation And Purification ◽  
Cyclodextrin Derivative ◽  
Complete Reaction ◽  
Solvent Free Conditions

A number of per-6-substituted cyclodextrin derivative syntheses have been effectively carried out in a planetary ball mill under solvent-free conditions. The preparation of Bridion® and important per-6-amino/thiocyclodextrin intermediates without polar aprotic solvents, a source of byproducts and persistent impurities, could be performed. Isolation and purification processes could also be simplified. Considerably lower alkylthiol/halide ratio were necessary to reach the complete reaction in comparison with thiourea or azide reactions. While the presented mechanochemical syntheses were carried out on the millimolar scale, they are easily scalable.

scholarly journals Efficacy of Selenourea Organocatalysts in Asymmetric Michael Reactions under Standard and Solvent-Free Conditions

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7303
Author(s):  
Mariola Zielińska-Błajet ◽  
Żaneta A. Mała ◽  
Rafał Kowalczyk
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Ball Mill ◽  
Solvent Free ◽  
Cinchona Alkaloid ◽  
Bifunctional Catalysts ◽  
The Novel ◽  
Michael Reactions ◽  
Solvent Free Conditions ◽  
Hydrogen Bond Donors

By varying the steric and electronic surroundings of the hydrogen-bonding motif, the novel chiral Cinchona-alkaloid based selenoureas were developed. Acting as bifunctional catalysts, they were applied in the Michael reactions of dithiomalonate and nitrostyrene providing chiral adducts with up to 96% ee. The asymmetric Michael–-hemiacetalization reaction of benzylidene pyruvate and dimedone, performed with the assistance of 5 mol% of selenoureas, furnished the product with up to 93% ee and excellent yields. The effectiveness of the new hydrogen-bond donors was also proved in solvent-free reactions under ball mill conditions, supporting the sustainability of the devised catalytic protocol.

scholarly journals Mechanochemical N-alkylation of imides

2017 ◽  
Vol 13 ◽  
pp. 1745-1752 ◽  
Author(s):  
Anamarija Briš ◽  
Mateja Đud ◽  
Davor Margetić
Keyword(s):  
Classical Solution ◽  
Ball Milling ◽  
Ball Mill ◽  
Alkyl Halides ◽  
Solvent Free ◽  
Solvent Free Conditions

The mechanochemical N-alkylation of imide derivatives was studied. Reactions under solvent-free conditions in a ball mill gave good yields and could be put in place of the classical solution conditions. The method is general and can be applied to various imides and alkyl halides. Phthalimides prepared under ball milling conditions were used in a mechanochemical Gabriel synthesis of amines by their reaction with 1,2-diaminoethane.

scholarly journals Mesoporous PbO nanoparticle-catalyzed synthesis of arylbenzodioxy xanthenedione scaffolds under solvent-free conditions in a ball mill

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31683-31690 ◽  
Author(s):  
Trimurti L. Lambat ◽  
Ratiram G. Chaudhary ◽  
Ahmed A. Abdala ◽  
Raghvendra Kumar Mishra ◽  
Sami H. Mahmood ◽  
...  
Keyword(s):  
Ball Milling ◽  
Ball Mill ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Pbo Nanoparticles

An efficient one-pot multicomponent protocol was developed for the synthesis of arylbenzodioxy xanthenedione scaffolds using mesoporous PbO nanoparticles as reusable catalyst under solvent-free ball milling conditions.

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