Graphite Oxide as an Efficient and Reusable Catalyst for Tetrahydropyranylation/Depyranylation of Alcohols and Phenols
Xu Liang, Yang Anwei, Ma Ning
Chin. J. Org. Chem. . 2013, (9): 2004 -2009 .  DOI: 10.6023/cjoc201303033