A series of pyrimido[4,5-d]pyrimidine derivatives were synthesized by a multicomponent reaction of urea/thiourea, aldehyde and barbituric or thiobarbituric acid in the presence of triethyl benzyl ammonium chloride as a catalyst under solvent-free conditions. The pure products were obtained after recrystallization from ethanol. All synthesized compounds were characterized using IR and NMR (1H and 13C) spectroscopic and elemental analyses data.
Research on Chemical Intermediates – Springer Journals
Published: Oct 4, 2013
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud