Ru(II)-(S)-Pheox Catalyst (1) is a chiral phenyloxazoline-ruthenium(II) complex, developed by Iwasa et al.
1 catalyzes highly enantioselective cyclopropanation of various olefins using diazoacetates1-6,8) or diazomethylphosphonates.7,8) In addition, 1 is also used for an enantioselective Si–H insertion reaction of α-diazo esters.9) 1 is a promising reagent for the synthesis of medicinally relevant optically active cyclopropane derivatives.
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