... doi:10.1016/j.ceca.2011.11.009. Go to reference 20. 15. Klunder, J. M.; Onami, T.; Sharpless, K. B. J. Org. Chem. 1989, 54, 1295–1304. ... The license is subject to the Beilstein Journal of Organic Chemistry terms and conditions: (http://www.beilstein-journals.org/bjoc). ...