Carbon-based solid acid has been used as a mild and efficient heterogeneous catalyst for the synthesis of tetrahydrobenzo[b]pyran derivatives via a one-vessel, three-component cyclocondensation of dimedone, aryl aldehydes, and malononitrile with high atom economy ranging from 94.2 to 95.4 %. The remarkable features of this new method are short reaction times, high yields, clean reaction profiles, and simple work-up procedure. The reactions were performed in ethanol and the catalyst could be recycled after a simple work-up, and used for many runs without significant loss of its activity. However, using aliphatic aldehydes, moderate yields of the products were obtained. The structure of the catalyst was confirmed by FT-IR spectroscopy, energy dispersive X-ray, X-ray diffraction, and the N2 adsorption/desorption analysis techniques.
Research on Chemical Intermediates – Springer Journals
Published: Jan 29, 2014
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.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera