Citation
A. Diazortiz et al., FIRST DIELS-ALDER REACTION OF PYRAZOLYL IMINES UNDER MICROWAVE IRRADIATION, Synlett, (10), 1998, pp. 1069
Citations number
12
Categorie Soggetti
Chemistry Inorganic & Nuclear
ISSN journal
09365214
Issue
10
Year of publication
1998
Database
ISI
SICI code
0936-5214(1998):10<1069:FDROPI>2.0.ZU;2-0
Abstract
Microwave irradiation in solvent-free conditions induces pyrazolyl 2-a
zadienes to undergo Diels-Alder cycloadditions with nitroalkenes withi
n 5-10. min to give good yields of pyrazolo[3,4-b]pyridines. This is t
he first example of a [4 + 2] cycloaddition of a 2-azadiene involving
a pyrazole ring. By classical heating, these reactions do not occur or
afford only traces of the products.