Title: Sulfamic Acid: An Efficient Catalyst for the Diastereoselective, One-Pot Synthesis of Pyrano Benzopyrans, Furano Benzopyrans and Ethoxy Benzopyrans
Volume: 2
Issue: 5
Author(s): R. S. Kumar, R. Nagarajan, K. Vijay and P. T. Perumal
Affiliation:
Keywords:
sulfamic acid, three- component coupling, diastereoselective, pyranobenzopyran, furanobenzopyran
Abstract: Sulfamic acid catalyses the one-pot three components coupling of aldehydes, anilines and electron rich dienophiles such as dihydropyran, dihydrofuran and ethyl vinylether resulting in the formation of pyrano, furano and ethoxy benzopyrans.