A highly diastereoselective pyrrolidine-promoted dibromination of alkenes by combination of NBS and succinimide is presented. The pyrrolidine-mediated dibromination of alkenes is higly anti-selective and gives the corresponding products in moderate to high yields and up to >25:1 dr.
umpolung of cationic bromine from N-bromosuccinimide (NBS) using an amine organocatalyst is reported. The intermediate reagents and their reactivity have well been characterised by spectroscopic and computational methods. Strategic structural change in the NBS molecule can cause sufficient polarity reversal to accelerate the dibromination reaction needing both “Br” synthons. This has further been utilised