A tandem olefin migration and Prins cyclization using Cu(OTf)2–bisphosphine complexes: an improved synthesis of functionalized tetrahydropyrans

Arun K. Ghosh, Daniel R. Nicponski, Jorden Kass
Tetrahedron Letters

Volume 53, Issue 29, 18 July 2012, Pages 3699–3702

http://dx.doi.org/10.1016/j.tetlet.2012.04.006