Liquid crystalline 5,6-O-acetals of L-galactono-1,4-lactone prepared by a microwave irradiation on montmorillonite

Csiba, M.; Cléophax, J.; Loupy, André; Malthête, Jacques; Géro, S. D.

doi:10.1016/s0040-4039(00)60779-7

Cited by 64 publications

(16 citation statements)

References 8 publications

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“…They explored solventfree microwave reactions, particularly with 'dry' media in open vessels. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Organic reactants, often together with an inorganic reagent, were adsorbed onto solid supports and heated in domestic microwave ovens. Samples were not mixed and their temperature was not measured.…”

Section: Beginnings Of Microwave-assisted Organic Chemistrymentioning

confidence: 99%

A Strategic, 'Green' Approach to Organic Chemistry with Microwave Assistance and Predictive Yield Optimization as Core, Enabling Technologies

Strauss¹

2009

Aust. J. Chem.

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Since 1988, we have pursued enabling technologies and methods as tools for 'green' synthetic chemistry. The developed technologies comprise hardware including catalytic membranes and continuous and batch microwave reactors that have established global markets, as well as interactive, predictive software for optimization of yields and translation of conditions. New methods include 'green' reactions such as a catalytic symmetrical etherification, Pd-catalyzed coupling processes and a multi-component cascade for aniline derivatives. Reactions and workup were facilitated through solvent-free conditions, aqueous media at high temperature and dimethylammonium dimethylcarbamate (dimcarb) as a 'distillable' protic ionic liquid, as well as by non-extractive techniques for product isolation. The technologies and methods were designed for use alone or in various combinations as desired. Consolidation of individual operations or processes into unit steps was achieved through multi-tasking: media, reactants, catalysts, and conditions were selected to serve several purposes at various stages of a reaction. The tools were used to establish a technology platform comprising structurally diverse oligomers, macrocycles, and rod-like molecules supplementary to those available through phenolformaldehyde chemistry. Dienone precursors were assembled from versatile building blocks containing complementary 'male' or 'female' fittings that were connected through inherently 'green' Claisen-Schmidt-type reactions. Isoaromatization afforded Horning-crowns, macrocyclic phenolic derivatives that were hybrids of calixarenes and crown ethers. Preliminary studies of organic substrates in salt water, with and without CO 2 , called into question proposals for disposal of anthropogenic CO 2 by deep-sea dispersal.

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Section: Beginnings Of Microwave-assisted Organic Chemistrymentioning

confidence: 99%

A Strategic, 'Green' Approach to Organic Chemistry with Microwave Assistance and Predictive Yield Optimization as Core, Enabling Technologies

Strauss¹

2009

Aust. J. Chem.

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“…Frequently these employ polymeric resins, in applications such as the facile generation of libraries of enones or amides and ureas [5]. The number of reported synthetic transformations conducted under solventless conditions (i.e., carbohydrate glycosylation [48] and acetalization on clay supports [49]) continues to increase yearly.…”

Section: Solid-state Reactionsmentioning

confidence: 99%

High-energy Glycoconjugates: Synthetic Transformations of Carbohydrates Using Microwave and Ultrasonic Energy

Cioffi

2008

CTMC

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Methods to transform carbohydrates are often complex and tedious, both due to the vast array of naturally occurring and synthetically designed scaffolds which may manifest meager to drastic reactivity, dependent upon the transformation sought and the stereogenic site chosen. In order to facilitate and expedite desired synthetic transformation, many researchers are utililizing microwave and ultrasonic irradiation to achieve their goals, in generally high yields within a shorter period of time, and often without undesirous byproducts. The basic physical principles underlying the energy regimes are qualitatively discussed prior to review of the applications in carbohydrate syntheses and transformation. This literature review looks at research involving glycosylations, -OH group conversions, isotopic incorporation, and C-N bond formation. Instances of improved yields and selectivities resultant from the use of these high-energy sources will be highlighted.

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“…Solvent-free microwave assisted reactions (Kidwai, 2001) provide an opportunity to work with open vessels thus avoiding the risk of high pressure and increasing the potential for scale up of such reactions. The practical feasibility of microwave assisted solvent free synthesis has been demonstrated in various useful transformations (Csiba et al, 1993;Villemin and Martin, 1995;Varma et al, 1997) and in the synthesis of heterocyclic systems (Scheme 9-11). The microwave technique has shown distinct advantages in not requiring prolonged heating to carry out a reaction.…”

Section: Energy Conservationmentioning

confidence: 99%

Green Chemistry: An Innovative Technology

Kidwai

Mohan

2005

Found Chem

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The drive towards clean technology in the chemical industry with an increasing emphasis on the reduction of waste at source requires a level of innovation and new technology that the chemical industry is beginning to adopt. The green chemistry revolution provides an enormous number of opportunities to discover and apply new synthetic approaches using alternative feedstocks; ecofriendly reaction conditions, energy minimizations and the design of less toxic and inherently safer chemicals.

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Liquid crystalline 5,6-O-acetals of L-galactono-1,4-lactone prepared by a microwave irradiation on montmorillonite

Cited by 64 publications

References 8 publications

A Strategic, 'Green' Approach to Organic Chemistry with Microwave Assistance and Predictive Yield Optimization as Core, Enabling Technologies

A Strategic, 'Green' Approach to Organic Chemistry with Microwave Assistance and Predictive Yield Optimization as Core, Enabling Technologies

High-energy Glycoconjugates: Synthetic Transformations of Carbohydrates Using Microwave and Ultrasonic Energy

Green Chemistry: An Innovative Technology

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