A stereoselective bromocyclopropanation of allylic alcohols using dibromomethylzinc bromide is described. Spectroscopic studies to monitor the formation of transient intermediates not only led to the development of a more-atom-economical halocyclopropanation reaction, but also highlighted the unique role of ether additives in the process. The desired bromo-substituted cyclopropanes were isolated in high yields and excellent diastereo- as well as enantioselectivities using readily available reagents.

No abstract

As tereoselective bromocyclopropanation of allylic alcohols using dibromomethylzinc bromide is described. Spectroscopic studies to monitor the formation of transient intermediates not only led to the development of amore-atomeconomical halocyclopropanation reaction, but also highlighted the unique role of ether additives in the process.T he desired bromo-substituted cyclopropanes were isolated in high yields and excellent diastereo-as well as enantioselectivities using readily available reagents.

No abstract

No abstract