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‘Bis(oxazolines)’ as Ligands for Self‐Assembling Chiral Coordination Polymers— Structure of a Copper( I ) Catalyst for the Enantioselective Cyclopropanation of Olefins
Author(s) -
Evans David A.,
Woerpel Keith A.,
Scott Michael J.
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199204301
Subject(s) - cyclopropanation , enantioselective synthesis , copper , catalysis , trifluoromethanesulfonate , chemistry , styrene , polymer chemistry , polymer , propane , organic chemistry , copolymer
An efficient Cu I catalyst for the highly enantioselective cyclopropanation (>98% ee ) of styrene with diazoacetic acid esters is obtained from the reaction of copper( I ) trifluoromethanesulfonate with bis(dihydrooxazolyl)propane ( 1 ). The CuOTf‐ 1 complex is a helical coordination polymer air‐stable in the solid state, whose structure is not retained in solution.