Ultrasonics Sonochemistry p. 1139 - 1143 (2013)
Update date:2022-07-29
Topics:
Buriol, Lilian
München, Taiana S.
Frizzo, Clarissa P.
Marzari, Mara R.B.
Zanatta, Nilo
Bonacorso, Helio G.
Martins, Marcos A.P.
Pyrazolo[1,5-a]pyrimidines were synthesized via the ultrasonic sonochemical method using the cyclocondensation reaction of 4-alkoxy-1,1,1-trifluoro-3- alken-2-ones [CF3C(O)CH = C(R)(OMe) - where R = Me, Bu, i-Bu, Ph, 4-Me-C6H4, 4-F-C6H4, 4-Cl-C 6H4, 4-Br-C6H4, naphth-2-yl and biphen-4-yl] - with 3-amino-5-methyl-1H-pyrazole in the presence of EtOH for 5 min. This methodology has several advantages, for example, it is a simple procedure, it has an easy work-up, mild conditions, short reaction times (5 min) and produces satisfactory yields (61-98%).
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