265116-59-4Relevant academic research and scientific papers
Synthesis of some new spiropyrazolo[4',5':5,6]pyrano[2,3-d]pyrimidines
Al-Thebeiti, Marzoog S.
, p. 621 - 628 (2007/10/03)
3-Methylpyrazolin-5-ones (1a,b) were reacted with cycloalkanones (2a-d) in the presence of fused sodium acetate to give the corresponding cycloalkylidene derivatives (3a-h). Reaction of compounds (3a-h) with malononitrile gave the pyrano derivatives (4a-h), which were cyclized to pyranopyrimidines with acetic anhydride/pyridine, formamide and formamide/formic acid.
