Elie J, Fruit C, Besson T. Microwave-Assisted Sequential One-Pot Synthesis of 8-Substituted Pyrazolo[1,5-
a][1,3,5]triazines.
Molecules 2021;
26:molecules26123540. [PMID:
34200623 PMCID:
PMC8230123 DOI:
10.3390/molecules26123540]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/02/2021] [Accepted: 06/09/2021] [Indexed: 11/16/2022] Open
Abstract
This paper reports a convenient sequential one-pot approach for the synthesis of an array of 14 pyrazolo[1,5-a][1,3,5]triazines, substituted in C8 by halogen (Br), various functions (CN and CO2Et) and alkyl or (het)aryl groups. This study confirms the interest of combining the efficient heating obtained under dielectric microwave heating and the achievement of sequential one-pot reactions, avoiding the tedious work-up and purification of intermediate compounds, achieving sustainable synthesis processes. Considering usual conventional methods, this microwave protocol is featured by advantages in terms of yields, reaction times, and convenient gram scale synthesis.
Collapse