 n - enoxyphthalimides undergo a rh(iii)-catalyzed 
 c  h activation 
 initiated cyclopropanation of electron deficient alkenes . 
 the reaction 
 is proposed to proceed via a directed activation of the olefinic c  h 
 bond followed by two migratory insertions , first across the electron - deficient 
 alkene and then by cyclization back onto the enol moiety . a newly 
 designed isopropylcyclopentadienyl ligand drastically improves yield 
 and diastereoselectivity . 
Supplementary Material