@article { author = {Kiasat, Ali Reza and Hamid, Sheida and Saghanezhad, Seyyed Jafar}, title = {Synthesis and Characterization of a Novel Nanosilica Supported Bipyridinium Chloride Nanocomposite and its Application as a Basic Catalyst in the One-pot Preparation of Tetrahydrobenzo[b]pyran, Dihydropyrano[3,2-c]chromene and Dihydropyrano[4,3-b]pyran Derivatives}, journal = {Nanochemistry Research}, volume = {1}, number = {2}, pages = {157-165}, year = {2016}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.7508/ncr.2016.02.003}, abstract = {A novel rice-husk-silica supported n-propyl bipyridinium chloride (RHPrBPCl) has been prepared. Due to the basicity of RHPrBPCl, it was decided to evaluate its catalytic activity in the one-pot preparation of tetrahydrobenzo[b]pyran, dihydropyrano[3,2-c]chromene and dihydropyrano[4,3-b]pyran derivatives. The catalyst was characterized by FT-IR, SEM and TGA analyses. This methodology offers several advantages including easy work-up procedure, high yields of the products, short reaction times, recyclable catalyst and green reaction medium.}, keywords = {Bipyridine,Dihydropyrano[3,2-c]chromenes,Dihydropyrano[4,3-b]pyrans,Nanosilica supported catalyst,Tetrahydrobenzo[b]pyran}, url = {http://www.nanochemres.org/article_17610.html}, eprint = {http://www.nanochemres.org/article_17610_852bd3c0cda89da168fad8db9edf2a97.pdf} }