Innovative Green Synthesis of 4-Aryl-Pyrazolo[5,6]Pyrano [2,3-d]Pyrimidines under Catalyst-Free Conditions
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DOI: 10.1080/10406638.2018.1484780
Abstract: Abstract A clean, cost-effective and practical approach has been described for the convenient synthesis of a library of 4-aryl-pyrazolo[5,6]pyrano[2,3-d]pyrimidines starting from a four-component condensation of ethyl acetoacetate, hydrazine hydrate, aromatic aldehydes, and barbituric/thiobarbituric acid in… read more here.
Keywords: pyrazolo pyrano; pyrano pyrimidines; aryl pyrazolo; catalyst free ... See more keywords
Synthesis of one-pot pyrazolo[4′,3′:5,6]pyrano[2,3-c]phenazin-15-yl) methanone derivatives via a multi-component using Fe3O4@TiO2-SO3H as a recoverable magnetic catalyst under microwave irradiation
Sign Up to like & getrecommendations! Published in 2020 at "Green Chemistry Letters and Reviews"
DOI: 10.1080/17518253.2020.1794056
Abstract: ABSTRACT A new one-pot method for the synthesis four-component of pyrazolo[4′,3′:5,6]pyrano[2,3-c]phenazin-15-yl)methanone derivatives has been developed in the presence of nano Fe3O4@TiO2-SO3H catalysts (heterogeneous acid) under microwave conditions and in a solvent-free environment at 180 W. One… read more here.
Keywords: methanone derivatives; pyrazolo pyrano; one pot; pyrano phenazin ... See more keywords