Authors: Michael P. Doyle* , Marina N. Protopopova, Bridget D. Brandes, Huw M. L. Davies, Nicholas J. S. Huby, James K. Whitesell
Syn. Lett.,
1993, 2, 151-153
The extent of stereodifferentiation in intermolecular cyclopropanation and cyclopropenation reactions has been determined with chiral diazoacetate esters possessing chiral auxiliaries derived from d- and l-menthol, (+)-trans-2-phenylcyclohexanol, and (-)-D-pantolactone, catalyzed by chiral dirhodium(II) tetrakis(methyl 2-pyrrolidone-5-carboxylates).