Synthesis of 1,1-Dibromo-3-hydroxyalkanes via Opening of Cyclic Sulfates
作者:Hans Christian Stiasny
DOI:10.1055/s-1996-4193
日期:1996.2
3-Alkoxy-1,1-dibromoalkanes are interesting substrates for diastereoselective bromine/lithium exchange reactions. A general route to the precursor 1,1-dibromo-3-hydroxyalkanes is described here via reaction of dibromomethyllithium with cyclic sulfates of 1,2-diols.
Unexpected tosyl deprotection during osmium catalysed dihydroxylation
作者:Frédéric Batt、Olivier Piva、Fabienne Fache
DOI:10.1016/j.tetlet.2007.11.058
日期:2008.1
Depending on the double bond position, tosyl deprotection was observed during olefin dihydroxylation using osmium tetroxide. leading to triols. (C) 2007 Elsevier Ltd. All rights reserved.