The author of 《A green, catalyst-free synthesis of pyrazolopyranopyrimidines in polyethylene glycol as a biodegradable medium at ambient temperature》 were Kardooni, Rezvan; Kiasat, Ali Reza. And the article was published in Molecular Diversity in 2019. HPLC of Formula: 135-02-4 The author mentioned the following in the article:
A facile, efficient and environmentally safe strategy for the synthesis of pyrazolopyranopyrimidines via one-pot, four-component reaction of hydrazine hydrate, barbituric acid, Et acetoacetate and aromatic aldehydes in polyethylene glycol (PEG) as a safe solvent in the absence of catalyst at ambient temperature were described. The advantages of the present protocol, such as simplicity, mild conditions, high yields of products, straightforward workup procedure, a green and biodegradable reaction medium, made this process an attractive to current methodologies. The results came from multiple reactions, including the reaction of 2-Methoxybenzaldehyde(cas: 135-02-4HPLC of Formula: 135-02-4)
2-Methoxybenzaldehyde(cas: 135-02-4) is found in cassia oil, cinnamon bark, and cinnamon bark oil. It is a clear colorless liquid with a strong aroma. It has been used to examine the acaricidal activity of Periploca sepium oil and its active component against Tyrophagus putrescentiae.HPLC of Formula: 135-02-4
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem