Phase-Transfer Catalysts

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (31 December 2014)

Special Issue Editors

Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
Interests: phase transfer catalysis; organocatalysis; green chemistry; bioactive compounds; non toxic antifouling agents
Special Issues, Collections and Topics in MDPI journals
Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
Interests: fundamental studies and applications of phase transfer catalysis

Special Issue Information

Dear Colleagues,

Phase-transfer catalysis (PTC) began to develop in the 1960s and soon received widespread attention by academic and industrial chemists due to its simplicity and versatility. Nowadays it still represents a well established procedure, widely employed in academic research and industrial applications, and is particularly attractive from the environmental and economic point of view. In particular, PTC is a powerful tool to carry out reactions with environmentally benign reagents and solvents under mild and safe reaction conditions, and is therefore a suitable methodology for practical synthesis on scale.

A typical example is the replacement of hazardous, expensive and strong bases with inexpensive alkaline hydroxides or carbonates.

Moreover, the great development in asymmetric PTC reactions has enormously increased the synthetic potential of this methodology.

This special issue will focus on recent progress in the application of PTC to organic synthesis and hopefully will contribute to increase familiarity of PTC within chemical community.

Dr. Domenico Albanese
Prof. Dr. Dario Landini
Guest Editors

Manuscript Submission Information

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Keywords

  • phase transfer catalysis
  • organocatalysis
  • non-hazardous reagents
  • asymmetric catalysis
  • depollution
  • environmentally benign reagents
  • green chemistry
  • sustainable development

Published Papers (3 papers)

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Research

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3684 KiB  
Article
Solventless Synthesis of Quaterphenyls and Terphenyls from Chalcones and Allylsulfones under Phase Transfer Catalysis Conditions
by Domenico C. M. Albanese, Selene Brunialti and Dario Destro
Catalysts 2016, 6(9), 142; https://doi.org/10.3390/catal6090142 - 13 Sep 2016
Cited by 4 | Viewed by 4844
Abstract
Easily available chalcones and allyl sulfones along with cheap solid NaOH and polyethyleneglycol (PEG) 1000 have been used to directly generate the meta-terphenyl or quaterphenyl motifs under Phase Transfer Catalysis solventless conditions. The new approach provides an economic and environmentally friendly solution [...] Read more.
Easily available chalcones and allyl sulfones along with cheap solid NaOH and polyethyleneglycol (PEG) 1000 have been used to directly generate the meta-terphenyl or quaterphenyl motifs under Phase Transfer Catalysis solventless conditions. The new approach provides an economic and environmentally friendly solution to removal of hazardous bases as well as organic solvents. Full article
(This article belongs to the Special Issue Phase-Transfer Catalysts)
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695 KiB  
Article
Cyclopropanation of 5-(1-Bromo-2-phenyl-vinyl)-3-methyl-4-nitro-isoxazoles under Phase Transfer Catalysis (PTC) Conditions
by Linda Piras, Maria Moccia, Mauro Cortigiani and Mauro F. A. Adamo
Catalysts 2015, 5(2), 595-605; https://doi.org/10.3390/catal5020595 - 13 Apr 2015
Cited by 21 | Viewed by 5742
Abstract
Heavily substituted cyclopropane esters were prepared in high yields, complete diastereoselection and average (up to 58%) enantioselectivity. The reaction described herein entailed reacting 4-nitro-5-bromostyrylisoxazoles, a class of powerful Michael acceptors with malonate esters under the catalysis of 5 mol% of a chincona derived [...] Read more.
Heavily substituted cyclopropane esters were prepared in high yields, complete diastereoselection and average (up to 58%) enantioselectivity. The reaction described herein entailed reacting 4-nitro-5-bromostyrylisoxazoles, a class of powerful Michael acceptors with malonate esters under the catalysis of 5 mol% of a chincona derived phase-transfer catalyst. Full article
(This article belongs to the Special Issue Phase-Transfer Catalysts)
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Review

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1157 KiB  
Review
Solid-Liquid Phase C-Alkylation of Active Methylene Containing Compounds under Microwave Conditions
by Alajos Grün, Erika Bálint and György Keglevich
Catalysts 2015, 5(2), 634-652; https://doi.org/10.3390/catal5020634 - 21 Apr 2015
Cited by 14 | Viewed by 7471
Abstract
The solid–liquid phase C-alkylation of active methylene containing compounds with C=O or P=O functions under phase transfer catalysis or microwave conditions has been summarized in this minireview. The mono- and dialkylation of the methylene containing derivatives was investigated under microwave (MW) conditions. [...] Read more.
The solid–liquid phase C-alkylation of active methylene containing compounds with C=O or P=O functions under phase transfer catalysis or microwave conditions has been summarized in this minireview. The mono- and dialkylation of the methylene containing derivatives was investigated under microwave (MW) conditions. It was found that in many cases, there was no need to use phase transfer catalyst under MW conditions. Moreover, most of the reactions were carried out without any solvent. These results mean a serious green chemical advantage. Full article
(This article belongs to the Special Issue Phase-Transfer Catalysts)
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