Allylic Bromination of Alkenes 0 HH N-Br (NBS) ■N-bromosuccinimide Allylic (NBS)selectively positions brominates allylic positions HH Cyclohexene ■Requires light for 3-Bromocyclohexene (85%) activation H Br Br· HB Br2 Br Allylic radical HBr Br HAllylic Bromination of Alkenes „ N-bromosuccinimide (NBS) selectively brominates allylic positions „ Requires light for activation