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Titolo:
Microwave irradiation in solvent-free conditions: an eco-friendly methodology to prepare indazoles, pyrazolopyridines and bipyrazoles by cycloaddition reactions
Autore:
Diaz-Ortiz, A; de la Hoz, A; Langa, F;
Indirizzi:
Univ Castilla La Mancha, Fac Quim, E-13071 Ciudad Real, Spain Univ Castilla La Mancha Ciudad Real Spain E-13071 071 Ciudad Real, Spain Univ Castilla La Mancha, Fac Ciencias Medioambiente, Toledo 45001, Spain Univ Castilla La Mancha Toledo Spain 45001 ambiente, Toledo 45001, Spain
Titolo Testata:
GREEN CHEMISTRY
fascicolo: 4, volume: 2, anno: 2000,
pagine: 165 - 172
SICI:
1463-9262(200008)2:4<165:MIISCA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYCLO-ADDITIONS; FOCUSED MICROWAVES; COUPLING REACTIONS; ELECTRON-TRANSFER; C-60-DONOR DYADS; DRY-MEDIA; DERIVATIVES; TETRATHIAFULVALENES; HETEROCYCLES; ALKYLATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Diaz-Ortiz, A Univ Castilla La Mancha, Fac Quim, E-13071 Ciudad Real, Spain Univ Castilla La Mancha Ciudad Real Spain E-13071 l, Spain
Citazione:
A. Diaz-Ortiz et al., "Microwave irradiation in solvent-free conditions: an eco-friendly methodology to prepare indazoles, pyrazolopyridines and bipyrazoles by cycloaddition reactions", GREEN CHEM, 2(4), 2000, pp. 165-172

Abstract

A study on the behaviour of vinylpyrazoles, pyrazolyl imines and pyrazolylhydrazones as dienes or dipoles is reported. Cycloaddition of the aforementioned compounds with electron-poor reagents under microwave irradiation insolvent-free conditions permits the preparation of indazoles, pyrazolopyridines and bipyrazoles in moderate to good yields. This represents an eco-friendly, green approach to these valuable pyrazole derivatives that avoids the harsh or highly contaminant conditions involving classical heating and offers a reduction or even elimination of solvent use and recovery, simplification of the work up procedures, facility of scale up and savings in energy consumption, in addition with higher yields.

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Documento generato il 04/12/20 alle ore 15:19:52