Enantioselective metal carbene transformations with polyethylene-bound soluble recoverable dirhodium(II) 2-pyrrolidone-5(S)-carboxylates
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Ligand displacement of methyl 2-pyrrolidone-5(S)-carboxylate (5(S)-MEPYH) from Rh 2 -(5(S)-MEPY) 4 by a soluble polyethylene-bound 2-pyrrolidone-5(S)-carboxylate produced a recoverable dirhodium (II) catalyst whose effectiveness was demonstrated by high enantioselection for intramolecular cyclopropanation of 3-methyl-2-buten-1-yl diazoacetate (98% ee) and intramolecular C-H insertion of 2-methoxyethyl diazoacetate (72% ee) as well as by catalyst recovery and reuse seven times. © 1992, American Chemical Society. All rights reserved.
author list (cited authors)
Doyle, M. P., Eismont, M. Y., Bergbreiter, D. E., & Gray, H. N.