952593-97-4Relevant academic research and scientific papers
NbCl5-promoted the synthesis of 4H-pyrans through multicomponent reaction
de Souza Siqueira, Mayara,da Silva-Filho, Luiz Carlos
, p. 5050 - 5052 (2016)
Multicomponent reactions between β-ketoesters and benzaldehydes for the synthesis of 4H-pyran derivatives promoted by niobium pentachloride (NbCl5) were carried out, providing good yields and reasonable reaction times under mild reaction condit
Unmodified nano-powder magnetite or iron(III) oxide catalyze the easy and fast synthesis of 4-substituted-4H-pyrans
Cano, Rafael,Ramón, Diego J.,Yus, Miguel
experimental part, p. 2017 - 2020 (2011/10/08)
Inexpensive and commercially available nano-power magnetite or iron(III) oxide can be used as catalyst in a new, straightforward, and fast protocol for the construction of 4-substituted-4H-pyrans. The reaction implies a tandem process, involving an aldol
