Eine bequeme Methode zur Herstellung 1-substituierter und 1,3-disubstituierter Pyrrole aus Acetalen von 3-Alkenalen

Synthesis of β-, γ-, δ-, ..., ω-Halogenated Ketones and Aldehydes

“…Olefin dibromination with Br 2 is compatible with the use of acetal protective groups, as was demonstrated by Kulinkovich and co-workers for acetals 174a-d (Scheme 44). 79 Upon deprotection under acidic conditions, β,γ-dibromoalkanals 176a-d were formed. Since the dibromides 175a-d and 176a-d were unstable, no attempts were made to isolate these species.…”