Organocatalysis as a Safe Practical Method for the Stereospecific Dibromination of Unsaturated Compounds
Gloria Hernández-Torres, Bin Tan and Carlos F. Barbas III*
*The Skaggs Institute for Chemical Biology and Departments of Chemistry and Molecular Biology, The Scripps Research Institute, 10550 Torrey Pines Road, La Jolla, California 92037, United States, Email: carlosscripps.edu
G. Hernández-Torres, B. Tan, C. F. Barbas III, Org. Lett., 2012, 14, 1858-1861.
DOI: 10.1021/ol300456x (free Supporting Information)
see article for more reactions
Organocatalytic stereospecific dibromination of various functionalized alkenes was achieved using a simple thiourea catalyst and 1,3-dibromo 5,5-dimethylhydantoin as a stable, inexpensive halogen source at room temperature. The procedure was extended to alkynes and aromatic rings and to dichlorination reactions by using the 1,3-dichloro hydantoin derivative.
see article for more examples