@article{cb73ffc52b404bd69775b6d19a8d0bd8,
title = "Tetrahydroquinoline syntheses induced with catalytic amounts of viologen additives",
abstract = "The viologen N,N′-dicyanomethyl-4,4′-bipyridinium·2PF6 was found to induce an aza-Diels-Alder reaction of N-arylimines with N-vinylpyrrolidinone or N-vinylcarbazole, producing tetrahydroquinoline derivatives with high cis/trans selectivities and yields.",
author = "Zheng Xue and Anindya Samanta and Whittlesey, {Bruce R.} and Mayer, {Michael F.}",
note = "Funding Information: We thank the Robert A. Welch foundation for financial support of this research project (Grant No. D-1635 ). ",
year = "2009",
month = nov,
day = "4",
doi = "10.1016/j.tetlet.2009.08.058",
language = "English",
volume = "50",
pages = "6064--6067",
journal = "Tetrahedron Letters",
issn = "0040-4039",
number = "44",
}