A. Berkessel et M. Frauenkron, CATALYTIC ASYMMETRIC EPOXIDATION WITH A CHIRAL RUTHENIUM PORPHYRIN AND N-OXIDES, Journal of the Chemical Society. Perkin transactions. I, (16), 1997, pp. 2265-2266
The enantiomerically pure ruthenium porphyrin 3 was synthesized in ver
y high yield by refluxing the porphyrin 2 with Ru-3(CO)(12) in phenol;
its subsequent use in the catalytic asymmetric epoxidation of olefins
with 2,6-dichloropyridine N-oxide as terminal oxidant, to afford epox
ides in good yields and with enantioselectivities up to 77%, is report
ed.