Strain-promoted retro-Dieckmann-type condensation on [2.2.2]- and [2.2.1]bicyclic systems: a fragmentation reaction for the preparation of functionalized heterocycles and carbocycles.
The fragmentation reaction of differently functionalized [2.2.2]- and [2.2.1]bicyclic systems that leads to substituted five membered heterocycles and five/six membered carbocycles is broadly studied. This reaction is carried out through a retro-Dieckmann-type condensation on strained [2.2.1]bicyclic β-ketosulfones and their counterparts β-ketoesters under very mild catalytic acid or basic conditions and short reaction times. The same reaction is also achieved on [2.2.2]bicyclic β-ketosulfones requiring harsher reaction conditions.
Department of Organic Chemistry, Faculty of Chemistry, University of Seville, C/Prof. García-González, 1, E-41012, Seville, Spain. ajmoreno@us.es robina@us.es.
Elena
E
Moreno-Clavijo
Antonio J
AJ
Moreno-Vargas
Ana T
AT
Carmona
Inmaculada
I
Robina