Asymmetric Cyclopropanation and Cyclopropenation

Rh2(5S-MEPY)4 Rti2(5S-MEPY)4 Rti2(5S-MEPY)4 Rti2(5S-MEPY)4 ref. 37 ref. 37 ref. 37 ref. 37 

These chiral catalysts have also been linked to polymeric resins (Equation (7)) for multiple use/reuse without significant loss in enantiocontrol (Fig. 15.2) [40, 41]. Both No-vasyn and Merrifield resins proved effective, and mixed hgand systems with enhanced electronic and steric characteristics could be produced by this methodology [41]. 

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